ORIGINAL_ARTICLE
Foreword
https://www.jwent.net/article_20472_ef01c8d0df733c0c33c9f67ea166ce0d.pdf
2016-07-01
0
0
Journal of Water and Environmental Nanotechnology
J Water Environ Nanotechnol
Foreword
Mohsen
Jahanshahi
info@jwent.net
1
Editor-in-Chief Journal of Water & Environmental Nanotechnology
LEAD_AUTHOR
ORIGINAL_ARTICLE
Effective removal of hexavalent mercury from aqueous solution by modified polymeric nanoadsorbent
Mercury is one of the most toxic metals present in the environment. Adsorption has been proposed among the technologies for mercury adsorbent. The kinetics of adsorption depends on the adsorbent concentration, and the physical and chemical characteristics of adsorbent. In this study we were used a novel adsorbent, magnetite-polyrhodanine core- shell nanoparticles, for removing Hg(II) from aqueous solution. The effect of pH, initial Hg(II) concentration, initial adsorbent concentration and contact time on the efficiency of Hg(II) removal were investigated systematically by batch experiments. The maximum adsorption capacity was obtained 29.14 mg g-1 at PH=6.5 and 25°C with 10 g L-1 nano adsorbent. The kinetic data of adsorption of Hg(II) ion on the synthesized adsorbent were best described by a pseudo- second- order equation, indicating their chemical adsorption. The Freundlich, Langmuir and Temkin isotherms were used to modeling of mercury adsorption on Hg(II) in aqueous medium which modeled best by the Freundlich isotherm is whole concentration rage.
https://www.jwent.net/article_20473_1c7059ef1fd9a0b42e6cf93799a289ee.pdf
2016-07-01
1
8
10.7508/jwent.2016.01.001
Adsorption
Core-shell polymer
Mercury
Morphology
Nanocomposite
Lida
Rahmanzadeh
lida.rahmanzadeh69@gmail.com
1
Babol University of Technology, P.O.Box 484, Babol, Iran.
AUTHOR
Mohsen
Ghorbani
m.ghorbani@nit.ac.ir
2
Faculty of Chemical Engineering, Babol University of Technology, P.O.Box 484, Babol, Iran.
LEAD_AUTHOR
Mohsen
Jahanshahi
jahanshahhhjahan@yahoo.com
3
Faculty of Chemical Engineering, Babol University of Technology, P.O.Box 484, Babol, Iran.
AUTHOR
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ORIGINAL_ARTICLE
Predictions of the adsorption equilibrium of CO2/O2 mixture on multi-walled carbon nanotube using Ideal Adsorbed Solution Theory
Multiwalled carbon nanotubes (MWCNT) were found to be an effective separation media for purifing CO2 from O2. Significant uptakes of CO2 and O2 were measured at 288 K, 298K and 308 K over the pressure range of 1 to 40 bar using volumetric method in dual sorption vessels. The same shape of isotherms introduced a common mechanism of adsorption but the amount of CO2 adsorbed on MWCNT is 2 times higher than O2 adsorption. The mass uptake of CO2 and O2 by MWCNT was found to increase with increasing pressure and decreasing temperature. The experimental data was well fitted by the Langmuir and Freundlich model isotherms considering the values of regression correlation coefficients. Following a simple acidic treatment procedure, CO2 and O2 adsorption was increased over range of pressure. The adsorbents was characterized by N2 adsorption isotherm at 77 K, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The effect of temperature and pressure on selectivity obtained from IAST demonstrated that maximum selectivity over the pressure and temperature ranges p = 0.5-5 bar and T = 298–308 K was achieved at 308 K and 5 bar.
https://www.jwent.net/article_20474_16a184a142af2367dd993b1eb8747283.pdf
2016-07-01
9
17
10.7508/jwent.2016.01.002
Adsorption isotherms
Carbon dioxide
IAST
MWCNT
Oxygen
Soodabeh
Khalili
soodabeh.khalili@yahoo.com
1
Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran.
LEAD_AUTHOR
Ali Asghar
Ghoreyshi
ghoreyshiasqarasqar@yahoo.com
2
Chemical Engineering Department, Babol University of Technology, Babol, Iran.
AUTHOR
Mohsen
Jahanshahi
jahanshahhhjahan@yahoo.com
3
Chemical Engineering Department, Babol University of Technology, Babol, Iran.
AUTHOR
Behnam
khoshandam
behnammmmmkhoshhhhh@yahoo.com
4
Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran.
AUTHOR
1. Samanta, A., A. Zhao, G.K. Shimizu, P. Sarkar, and R. Gupta, 2011. Post-combustion CO2 capture using solid sorbents: a review. Industrial & Engineering Chemistry Research, 51(4): 1438-1463.
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20
ORIGINAL_ARTICLE
Selective removal of dicamba from aqueous samples using molecularly imprinted polymer nanospheres
For the first time, uniform molecularly imprinted polymer (MIP) nanoparticles were prepared using dicamba as a template. The MIP nanoparticles were successfully synthesized by precipitation polymerization using methacrylic acid (MAA) as functional monomer, trimethylolpropane trimethacrylate (TRIM) as cross-linker and acetonitrile as porogen. The produced polymers were characterized by differential scanning calorimetry (DSC) and their morphology was precisely examined by scanning electron microscopy (SEM). The MIP nanospheres were obtained with the average diameter of 234 nm. Batch-wise guest binding experiments were carried out to determine the removal efficiency of the produced MIP nanoparticles towards the template molecule in aqueous solutions. The MIP showed outstanding affinity toward dicamba in aqueous solution with maximum removal efficiency of 87.5% at 300 mg.L-1 of dicamba solution. The MIP exhibited higher adsorption efficiency compared with the corresponding non-imprinted polymer (NIP) as well as outstanding selectivity towards dicamba relative to the template analog in an aqueous solution. Moreover, effects of pH on removal efficiency and selectivity of MIP were evaluated in detail.
https://www.jwent.net/article_20475_3f1ec1ce78c11fe11a94ef05fe4d4e76.pdf
2016-07-01
19
25
10.7508/jwent.2016.01.003
Dicamba
Molecularly imprinted polymer
Molecular recognition
Nanospheres
Precipitation polymerization
Water treatment
Tooraj
Beyki
tooraj.beyki@gmail.com
1
Department of chemical engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran.
AUTHOR
Mohammad Javad
Asadollahzadeh
m.asadalahzadeh@gmail.com
2
Department of chemical engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran.
LEAD_AUTHOR
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12. Javanbakht, M., S. Eynollahi Fard, A. Mohammadi, M. Abdouss, M. R. Ganjali, P. Norouzi and L. Safaraliee, 2008. Molecularly imprinted polymer based potentiometric sensor for the determination of hydroxyzine in tablets and biological fluids. Anal. Chim. Acta. 612(1): 65–74.
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13. Cui, A., A. Singh and D.L. Kaplan, 2002. Enzyme-Based Molecular Imprinting with Metals. Biomacromolecules. 3(6): 1353–1358.
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14. Chen, W., D.K. Han, K.D. Ahn and J.M. Kim, 2002. Molecularly imprinted polymers having amidine and imidazole functional groups as an enzyme-mimetic catalyst for ester hydrolysis. Macromol. Res. 10(2): 122-126.
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20. Masoumi, M. and M. Jahanshahi, 2015. Synthesis and Recognition of Nano Pore Molecularly Imprinted Polymers of Thymol on the Surface of Modified Silica Nanoparticles. Adv. Polym. Technol. doi: 10.1002/adv.21548.
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27. Sellergren, B., 2001. Molecularly Imprinted Polymers: Man-Made Mimics of Antibodies and their Application in Analytical Chemistry. Elsevier.
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28. Haupt, K. 2003. Imprinted Polymers-Tailor-Made Mimics of Antibodies and Receptors. Chem. Commun. 34(15): 171-178.
28
29. Omidi, F., M. Behbahani, H. Sadeghi Abandansari, A. Sedighi and S.J. Shahtaheri, 2014. Application of molecular imprinted polymer nanoparticles as a selective solid phase extraction for preconcentration and trace determination of 2,4-dichlorophenoxyacetic acid in the human urine and different water samples. J. Environ. Health Sci. Eng. 12:137.
29
30. Yanli, S., 2014. Molecularly imprinted polymer for 2, 4-dichlorophenoxyacetic acid prepared by a sol-gel method. J. Chem. Sci. 126(4): 1005–1011.
30
31. Bruggemann, O., K. Haupt, L. Ye, E. Yilmaz and K. Mosbach, 2000. New configurations and applications of molecularly imprinted polymers. J. Chromatogr. A. 889(1–2): 15–24.
31
32. Pan, G., B. Zu, X. Guo, Y. Zhang, C. Li and H. Zhang, 2009. Preparation of molecularly imprinted polymer microspheres via reversible addition-fragmentation chain transfer precipitation polymerization. Polymer. 50(13): 2819–2825.
32
33. Jiang, Y. and A.J. Tong, 2004. Synthesis of molecularly imprinted microspheres for recognition of trans-aconitic acid. J. Appl. Polym. Sci. 94(2): 542-547.
33
34. Esfandyari-Manesh, M., M. Javanbakht, F. Atyabi and R. Dinarvand, 2012. Synthesis and Evaluation of Uniformly Sized Carbamazepine-Imprinted Microspheres and Nanospheres Prepared with Different Mole Ratios of Methacrylic Acid to Methyl Methacrylate for Analytical and Biomedical Applications. J. Appl. Polym. Sci. 125(3): 1804–1813.
34
35. Esfandyari-Manesh, M., M. Javanbakht, F. Atyabi, A. Badiei and R. Dinarvand, 2011. Effect of Porogenic Solvent on the Morphology, Recognition and Release Properties of Carbamazepine Molecularly Imprinted Polymer Nanospheres. J. Appl. Polym. Sci. 121(2): 1118–1126.
35
36. Yu, Q., S. Deng and G. Yu, 2008. Selective removal of perfluorooctane sulfonate from aqueous solution using chitosan-based molecularly imprinted polymer adsorbents. Water Res. 42(12): 3089–3097.
36
37. Dai, C., S-U. Geissen, Y-L. Zhang, Y-J. Zhang and X-F. Zhou, 2011. Selective removal of diclofenac from contaminated water using molecularly imprinted polymer microspheres. Environ. Pollut. 159(6):.1660-1666.
37
38. Lee, S-C., F-L. Chuang, Y-L. Tsai and H. Chen, 2010. Studies on the preparation and properties of sol-gel
38
molecularly imprinted polymer based on tetraethoxysilane for recognizing sulfonamides. J. Polym. Res. 17(5): 737-744.
39
39. Jervais, G., B. Luukinen, K. Buhl and D. Stone, 2008. 2,4-D Technical Fact Sheet. National Pesticide Information Center. Oregon State University Extension.
40
ORIGINAL_ARTICLE
Photo-Catalytic Degradation of Methylene Blue by ZnO/SnO2 Nanocomposite
In this study, considering the importance of protecting the environment and preventing the pollution caused by industrial plants, a nanocomposite each component thereof is capable of removing the desired combination to solve this problem has been produced. To achieve this goal, ZnO/SnO2nanocomposite was synthesized using the co-precipitation method. The characterization of this nanocomposite was conducted by DLS, XRD, FTIR and SEM. The nanocomposite size was about 15nm. Several parameters such as the initial concentration of the wastewater, as well as the amount of catalyst and time were investigated. The reduction of the particle size due to an increase in the surface area of the nanocomposite increased the amount of decolorization. For all the performed experiments, the dye removal rate was 100% and the difference was to do with the time of the complete removal of methylene blue. A decrease in the concentration of methylene blue in the range of the tested concentrations reduced the decolorization, and by increasing the amount of nanocomposite in the range of the tested values, a decline in decolorization was observed.
https://www.jwent.net/article_20476_1bc822ef2c79966bf4a6b8a5766f80a6.pdf
2016-07-01
27
34
10.7508/jwent.2016.01.004
co-precipitation
Decolorization
Nanocomposite
Wastewater
ZnO/SnO2
Samad
Sabbaghi
sabbaghi@shirazu.ac.ir
1
Nano Chemical Eng. Dep., Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran.
LEAD_AUTHOR
Fateme
Doraghi
fatemedoraghi@gmail.com
2
Nano Chemical Eng. Dep., International Division, Shiraz University, Shiraz, Iran.
AUTHOR
1. Kuzhalosai, V., B. Subash, A. Senthilraja, P. Dhatshanamurthi and M. Shanthi, 2013. Synthesis, Characterization and Photocatalytic Properties of SnO2–ZnO Composite under UV-A Light. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 115(1): 876-882.
1
2. Hamrouni, A., H. Lachheb and A. Houas, 2013. Synthesis, Characterization and Photocatalytic Activity of ZnO-SnO2 Nanocomposites. Materials Science and Engineering: B, 178(20): 1371-1379.
2
3. Thiruvenkatachari, R., S. Vigneswaran and S. Moon, 2008. A Review on UV/TiO2 Photocatalytic Oxidation Process. Korean Journal of Chemical Engineering, 25(1): 64-72.
3
4. Mai, F.D., C.C. Chen, J.L. Chen and S.C. Liu, 2008. Photodegradation of Methyl Green Using Visible Irradiation in ZnO Suspensions Determination of the Reaction Pathway and Identification of Intermediates by a High-Performance Liquid Chromatography–Photodiode Array-Electrospray Ionization-Mass Spectrometry Method. Journal of Chromatography A, 1189(1): 355-365.
4
5. Yang, Z., L. Lv, Y. Dai, Z. Xv and D. Qian, 2010. Synthesis of ZnO–SnO2 Composite Oxides by CTAB-Assisted Co-precipitation and Photocatalytic Properties. Applied Surface Science, 256(9): 2898-2902.
5
6. Houas, A., H. Lachheb, M. Ksibi, E. Elaloui, C. Guillard and J-M. Herrmann, 2001. Photocatalytic Degradation Pathway of Methylene Blue in Water. Applied Catalysis B: Environmental, 31(2): 145-157.
6
7. Lin, C-C and Y-J. Chiang, 2012. Feasibility of Using a Rotating Packed Bed in Preparing Coupled ZnO/SnO2 Photocatalysts. Journal of Industrial and Engineering Chemistry, 18(4): 1233-1236.
7
8. Li, D., H. Haneda, N. Ohashi, S. Hishita and Y. Yoshikawa, 2004. Synthesis of Nanosized Nitrogen-Containing MOx–ZnO (M = W, V, Fe) Composite Powders by Spray Pyrolysis and Their Visible-Light-Driven Photocatalysis in Gas-Phase Acetaldehyde Decomposition. Catalysis Today, 93-95(1): 895-901.
8
9. Li, D and H. Haneda, 2003. Photocatalysis of Sprayed Nitrogen-Containing Fe2O3–ZnO and WO3–ZnO Composite Powders in Gas-Phase Acetaldehyde Decomposition. Journal of Photochemistry and Photobiology A: Chemistry, 160(3): 203-212.
9
10. Yang, J., D. Li, X. Wang, X. Yang, and L. Lu, 2002. Rapid Synthesis of Nanocrystalline TiO2/SnO2 Binary Oxides and Their Photoinduced Decomposition of Methyl Orange. Journal of Solid State Chemistry, 165(1): 193-198.
10
11. Shi, L., C. Li, H. Gu and D. Fang, 2000. Morphology and Properties of Ultrafine SnO2-TiO2 Coupled Semiconductor Particles. Materials Chemistry and Physics, 62(1): 62-67.
11
12. Ratanatawanate, C., Y. Tao and K.J. Balkus, 2009. Photocatalytic Activity of PbS Quantum Dot/TiO2 Nanotube Composites. Journal of Physical Chemistry C, 113(24): 10755-10760.
12
13. Wang, C., B-Q. Xu, X. Wang and J. Zhao, 2005. Preparation and Photocatalytic Activity of ZnO/TiO2/SnO2 Mixture. Journal of Solid State Chemistry, 178(11): 3500-3506.
13
14. Cun, W., Z. Jincai, W. Xinming, M. Bixian, S. Guoying, P. Ping’an and F. Jiamo, 2002. Preparation, Characterization and Photocatalytic Activity of Nano-Sized ZnO/SnO2 Coupled Photocatalysts. Applied Catalysis B: Environmental, 39(3): 269-279.
14
15. Lucas, M.S and J.A. Peres, 2007. Degradation of Reactive Black 5 by Fenton/UV-C and Ferrioxalate/H2O2/Solar Light Processes. Dyes and Pigments, 74(3): 622-629.
15
16. Aksu, Z., 2005. Application of Biosorption for the Removal of Organic Pollutants: A Review. Process Biochemistry, 40(3-4): 997-1026.
16
17. Somasiri, W., X-F. Li, W-Q. Ruan and C. Jian, 2008. Evaluation of the Efficacy of Upflow Anaerobic Sludge Blanket Reactor in Removal of Colour and Reduction of COD in Real Textile Wastewater. Bioresource Technology, 99(9): 3692-3699.
17
18. Wang, C., X. Wang, B-Q. Xu, J. Zhao, B. Mai, P. Peng, G. Sheng and J. Fu, 2004. Enhanced Photocatalytic Performance of Nanosized Coupled ZnO/SnO2 Photocatalysts for Methyl Orange Degradation. Journal of Photochemistry and Photobiology A: Chemistry, 168(1-2): 47-52.
18
19. Mihaiu, S., I. Atkinson, O. Mocioiu, A. Toader, E. Tenea and M. Zaharescu, 2011. Phase Formation Mechanism in the ZnO-SnO2 Binary System. Roumanian Journal of Chemistry, 56(5), 465-472.
19
20. Sandesh, S., G.V. Shanbhag and A.B. Halgeri, 2014. Zinc Hydroxystannate: A Promising Solid Acid–Base Bifunctional Catalyst. The Royal Society of Chemistry, 4(2): 974-977.
20
21. Kartal, Ö.E., M. Erol and H. Oguz, 2001. Photocatalytic Destruction of Phenol by TiO2 Powders. Chemical Engineering & Technology, 24(6): 645-649.
21
22. Konstantinou, I.K and T.A. Albanis, 2004. TiO2-Assisted Photocatalytic Degradation of Azo Dyes in Aqueous Solution: Kinetic and Mechanistic Investigations: A Review. Applied Catalysis B: Environmental, 49(1): 1-14.
22
23. Mahmoudi, N.M., K.H. Rayat Tari, S. Borhani, M. Arami and F. Nourmohammadian, 2008. Decolorization of Colored Wastewater Containing Azo Acid Dye Using Photo-Fenton Process: Operational Parameters and a Comparative Study. Journal of Color Science and Technology, 2(1): 23-29.
23
24. Mahmoudi, N.M., M. Arami, K.A.D. Gharanjig and F. Nourmohammadian, 2007. Decolorization and Mineralization of Basic Dye Using Nanophotocatalysis: Pilot Scale Study. Journal of Color Science and Technology, 1(1): 1-6.
24
25. Daneshvar, N., M.A. Behnajady and Y. Zorriyeh Asghar, 2007. Photooxidative Degradation of 4-Nitrophenol (4-NP) in UV/H2O2 Process: Influence of Operational Parameters and Reaction Mechanism. Journal of Hazardous Materials, 139(2): 275-279.
25
26. Kansal, S.K., M. Singh and D. Sud, 2007. Studies on Photodegradation of Two Commercial Dyes in Aqueous Phase Using Different Photocatalysts, 141(3): 581-590.
26
ORIGINAL_ARTICLE
Synthesis, characterization and application of Lanthanide metal-ion-doped TiO2/bentonite nanocomposite for removal of Lead (II) and Cadmium (II) from aquatic media
The efficient application of the photocatalytic activity and superficial adsorption on removing heavy metals from water, two types of sorbents, Nd-TiO2/bentonite and Ce-TiO2/bentonite nanocomposites, were synthesized by sol-gel method. The crystalline nanocomposites were obtained after heat treatment at 500 °C for 3 hours. The results of scanning electron microscopy (SEM) indicates that Nd-TiO2/bentonite and Ce-TiO2/bentonite were produced on a nanoscale. The phase change of both nanocomposite from amorphous to anatase has been investigated by X- ray diffraction. Removal of lead (II) and cadmium (II) were studied through adsorption on these nanocomposites by letting them float in the bulk of sample for a definite time in presence and absence of light. The effective parameters in removal process were studied and optimized. The optimum pH, removal time and sorbent dosage in the absence and presence of light for Pb2+ ion were 7, 0.3 g, 15 min and for Cd2+ ion were 7, 0.4 g, 20 min, respectively. Subsequently, the effect of interfering ions in removal process was investigated at optimum conditions and no evidence of interference was observed. The study showed that reproducibility of method (n=9) is good and suitable. The results further indicated that the removal efficiency of Pb2+ ion with Nd-TiO2/bentonite in the presence of light was more than that in the absence of light. Finally, the equilibrium adsorption data fitted Freundlich and Langmuir adsorption models.
https://www.jwent.net/article_20477_fdfcfb7fe3e89430be0a16d22ef5e0fa.pdf
2016-07-01
35
44
10.7508/jwent.2016.01.005
Cadmium (II)
Lead (II)
Nanocomposite
Nanotechnology
Removal
Susan
Samadi
susansamadi@iausr.ac.ir
1
Department of Chemistry, College of Basic Science, Yadegar -e- Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic Azad University, Tehran, Iran.
LEAD_AUTHOR
Rokhsareh
Motallebi
rokhi.motalebi@yahoo.com
2
Department of Chemistry, College of Basic Science, Yadegar -e- Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic Azad University, Tehran, Iran.
AUTHOR
Maryam
Nasiri Nasrabadi
maryam_nasiri_66@yahoo.com
3
Department of Chemistry, College of Basic Science, Yadegar -e- Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic Azad University, Tehran, Iran.
AUTHOR
1. Adebayo, A.O., 2013. Investigation on pleurotus ferulae potential for the sorption of Pb(II) from aqueous solution. Bull Chem Soc Ethiop, 27(1): 25-34.
1
2. Sara vanan, D., T. Gomathi and P.N. Sudha, 2013. Sorption studies on heavy metal removal using chitn/bentonite biocomposite. Int J Biol Macromol, 53:67-71.
2
3. Ahmad, A., R. Ghufran andW. Mohd Faizal, 2010. Cd (II), Pb (II) and Zn (II) Removal from contaminated water by Biosorption using Activated sludge Biomass. Clean, 38(2): 153-158.
3
4. Bramat, M., 2007. Metal technology welding control and tests. El Coll De Boeck University France.
4
5. Grimshaw, P., J.M. Calo, P.A. Shirvanian and G. Hradil, 2011. Electrodeposition/Removal of Nickel in a spouted electrochemical. Ind Eng Chem Res, 50(16): 9525-9531.
5
6. Dabrowski, A., Z. Hubicki, P. Pod koscielny and E. Robens. 2004. Selective removal of the heavy metal ions from waters and industrial wastewaters by ion- Exchange method. Chemosphere, 56(2): 91-106.
6
7. Alfassi, Z.B. and C.M. Wai, 1992. Preconcentration Technique for trace elements. CRC Press Boston MA.
7
8. Eba, F., J.Ndong NLo, J.A. Ondo, P. Andeme EYi and E. Nsi- Emvo, 2013. Batch experiments on the removal of U (VI) ions in aqueous solutions by adsorption onto a natural clay surface. J Environ Earth Sci, 3(1): 11-23.
8
9. Anirudhan, T.S., S. Jalajamony and S.S. Sreekumari, 2012. Adsorption of heavy metal ions from aqueous solutions by amine and carboxylate furctionalised bentonites. Appl Clay Sci, 65-66: 67-71.
9
10. Lu, Ch. And H. Chiu, 2006. Adsorption of Zinc (II) from water with purified carbon nanotubes. Chem Eng Sci, 61: 1138-1145.
10
11. Samadi, S., F. Khalilian and A. Tabatabaee, 2014. Synthesis, Characterization and application of Cu-TiO2/chitosan nanocomposite thin film for the removal of some heavy metals. J Nanostruct Chem, 4(48): 1-8.
11
12. Khayet, M., J.P.G. Villaluenga, J.L. Valentin, M.A. Lopez-Manchado, J.A. Mengual and B. Seoane, 2005. Filled poly (2,6-dimethyl-1,4-phenylene oxide) dense membranes by silica and silane modified silica nanoparticles characterization and application in pervaporation. Polymer, 47: 114-122.
12
13. Shen, J.Y., W.T. Zhu, L.Q.Chen and X.P. Qiu, 2006. A nanocomposite proton exchange membrane based on PVDF, poly (2-acvylamido-2-methyl propylene sulfonic acid), and nano Al2O3 for direct methanol fuel cells. J Power Sources, 159: 894-899.
13
14. Han, P., H. Yahui, W. Yang and L. Linlin, 2006. Preparation of poly sulfone- Fe3O4 composite ultrafiltration membrane and its magnetic field. J Membr Sci, 284: 9-16.
14
15. Huang, H.G., J.H. Chen and L.C. Zou, 2003. Preparation and characterization of ZnO-PANI composite film. J Rare Met, 27: 91-94.
15
16. Bottino, A., G. Capannelli and A. Comite, 2002. Preparation and characterization of novel porous PVDF-ZrO2 Composite membranes. Desalination, 146: 35-40.
16
17. Trigo, C.E.L., A.O. Porto and G.M. De lima, 2004. Preparation and characterization of ZnO-PANI composite film. Eur Poly J, 40: 2465-2469.
17
18. Wu, Z., G. Suna, W. Jin, S. Hou Wang and Q. Xin, 2008. Nafion and nano-size TiO2-SO42- solid super acid composite membrane for direct methanol fuel cell. J Member Sci, 313: 336-343.
18
19. Zhou, H., Y. Chen, H. Fan, H. Shi, Z. Luo and B. Shi, 2008. Water vapor permeability of the polyurethane/TiO2 nanohybrid membrane with temperature sensivity. J Appl Polym Sci, 109: 3002-3007.
19
20. Mishra, S.P. 2014. Adsorption–desorption of heavy metal ions: a review. Curr Sci India, 107(4): 601-612.
20
21. Kabra, K., R. Chaudhary, R.L. Sawhney, 2004. Treatment of hazardous organic and inorganic compounds though aqueous phase photocatalysis: a review. Ind Eng Chem Res, 43: 7683-7696.
21
22. Prairie, M.R., L.R.Evans and S.L.Martinez, 1994. Destruction of organics and removal of heavy metals in water via TiO2 photocatalysis. In Chemical Oxidation: Technology for the nineties. Second International Symposium, Eckenfelder, Bowers, WW, Roth, AR, Eds., JA Technomic Publishing Company Lancaster Pa 428-441.
22
23. Anirudhn, T.S., S. Jalajamony and S.S. Sreekumari, 2012. Adsorption of heavy metal ions from aqueous solutions by amine and carboxylate functionalized bentonite. Appl Clay Sci, 65-66: 67-71.
23
24. Saravanan, D., T. Gomathi and P.N. Sudha, 2013. Sorption studies of heavy metal removal using chitin/bentonite bicomposite. Int J Biol Macromol, 53: 67-71.
24
25. Zhao, G., L. Chen, Y. Tang, L. He, B. Long, Z. Nie and H. Chen, 2014. Preparation of TiO2 photocatalyst loaded bentonite material and study of catalytic degradation. Mater Sci Forum, 809-810:860-866.
25
26. Aberoomand Azar, P., Sh. Moradi Dehaghi, S. Samadi, M. Saber Tehrani and M.H. Givianrad, 2011. Effect of CMC and HPC mixture on the photocatalytic activity of Nd-TiO2/SiO2 film 00under visible light irradiation. Turk J Chem, 35: 37- 44.
26
27. Samadi, S., 2012. Effect of HPC, PEG, CMC and PVP on the microstructure and photocatalytic activity of Nd-TiO2/SiO2 films under visible light irradiation. Asian J Chem, 24: 3649-3652.
27
28. Mahdavi, Sh., Jalali, M. and Afkhami, A., 2013. Heavy Metals removal from aqueous solutions using TiO2, MgO, and Al2O3 nanoparticles. Chem Eng Commun, 2013(3): 448-470.
28
29. Zhang, X.J., Ma, T.Y. and Yuan, Z.Y., 2008. Titania–phosphonate hybrid porous materials: preparation, photocatalytic activity and heavy metal ion adsorption. J Mater Chem, 18:2003-2010.
29
ORIGINAL_ARTICLE
Comparison of Kaolin and chemical source for preparation of Nano pore NaA Zeolite membranes
Zeolite membranes have uniform and nano-sized pores, and they separate molecules based on differences in the molecules size and diffusion properties. Different routes used to prepare zeolite composite membranes include growing zeolite layers from gels on porous supports. Our approach to membrane synthesis was based on hydrothermally converting films of layered aluminosilicates into zeolite films. In this research, synthesis of nano NaA zeolite membrane from kaolin was investigated. In the first step, kaolin has been calcined at 700 °C to the metakaolinite phase. As a second step, the zeolitisation experiments have been carried out under hydrothermal conditions. The metakaolinite obtained has been reacted with NaOH solutions in autoclaves at 100°C. X-ray diffraction (XRD) patterns of the membranes exhibited peaks corresponding to the support and the zeolite. The morphology of the support and membrane subjected to crystallization was characterized by Scanning electron microscopy (SEM). Separation performance of the NaA membranes was evaluated using pervaporation of water–Ethanol mixtures. The membranes showed high water selectivity in the water–Ethanol mixtures.
https://www.jwent.net/article_20478_78c83e836681e95a648512bc7b0bb290.pdf
2016-07-01
45
53
10.7508/jwent.2016.01.006
Kaolin
Nano
Pervaporation
Synthesis
Zeolite
Mansoor
Kazemimoghadam
mzkazemi@gmail.com
1
Malek Ashtar University of Technology, Faculty of Chemical and Chemical Engineering, Tehran, Iran
LEAD_AUTHOR
1. A. Almutairi, L. Weatherley, Intensification of ammonia removal from waste water in biologically active zeolitic ion exchange columns, Journal of Environmental Management 160 (2015) 128–138.
1
2. H. Premakshi, K. Ramesh, M. Kariduraganavar, Modification of crosslinked chitosan membrane using NaY zeolite for pervaporation separation of water–isopropanol mixtures, Chemical Engineering Research and Design 94 (2015) 32–43.
2
3. Sorenson. S, E. Payzant, W. Gibbons, B. Soydas, H. Kita, R. Noble, J. Falconer, Influence of zeolite crystal expansion/contraction on NaA zeolite membrane Separations, Journal of Membrane Science 366 (2011) 413–420.
3
4. Chun-Feng Wang, Jian-Sheng Li, Lian-Jun Wang, Xiu-Yun Sun, Influence of NaOH concentrations on synthesis of pure-form zeolite A from fly ash using two-stage method, Journal of Hazardous Materials 155 (2008) 58–64.
4
5. Sathy Chandrasekhar, P.N. Pramada, Kaolin-based zeolite Y, a precursor for cordierite ceramics, Applied Clay Science 27 (2004) 187– 198.
5
6. B. Zhu, D. Myat, G. Connor, Application of robust MFI-type zeolite membrane for desalination of saline wastewater, Journal of Membrane Science 475 (2015) 167-174.
6
7. S. Basu, S. Mukherjee, A. Kaushik, Integrated treatment of molasses distillery wastewater using microfiltration (MF), Journal of Environmental Management 158 (2015) 55–60.
7
8. Mahir Alkan, C. gilded Hopi, Zoo¨ Ryrie Wilma, Hail Go¨ leer, The effect of alkali concentration and solid/liquid ratio on the hydrothermal synthesis of zeolite NaA from natural kaolinite, Microporous and Mesoporous Materials 86 (2005) 176–184.
8
9. Fernando G. Colina, Joan Llorens, Study of the dissolution of dealuminated kaolin in sodium–potassium hydroxide during the gel formation step in zeolite X synthesis, Microporous and Mesoporous Materials xxx (2007) 157–166.
9
10. K. Speronello, Porous mullite, U.S. Patent NO 4628042, 1986.
10
11. K. Speronello, Porous mullite, U.S. Patent No. 4601997, 1986.
11
12. Sanaa Jamaly, Adewale Giwa, Shadi Wajih Hasan, Recent improvements in oily wastewater treatment: Progress, challenges, and future opportunities, Journal of Environmental Sciences 37 (2015) 15–37.
12
13. Sonia Aguado, Jorge Gascn, Jacobus C. Jansen, Freek Kapteijn, Continuous synthesis of NaA zeolite membranes, Microporous and Mesoporous Materials 120 (2009) 170–176.
13
14. A. Malekpour, M.R. Mililani, M. Kheirkhah, Synthesis and characterization of a NaA zeolite membrane and its applications for desalination of radioactive solutions, Desalination 225 (2008) 199–208.
14
15. L. Heller-Kallai, I. Lapides, Reactions of kaolinites and metakaolinites with NaOH—comparison of different samples (Part 1), Applied Clay Science 35 (2007) 99–107.
15
16. I. Lapides, L. Heller-Kallai, Reactions of metakaolinite with NaOH and colloidal silica — Comparison of different samples (part 2), Applied Clay Science 35 (2007) 94–98.
16
17. Sathy Chandrasekhar, P.N. Pramada, Microwave assisted synthesis of zeolite A from metakaolin, Microporous and Mesoporous Materials 108 (2008) 152–161.
17
18. L. Ayele, J. Pariente, Y. Chebude, Synthesis of zeolite A from Ethiopian kaolin, Microporous and Mesoporous Materials 215 (2015) 29-36.
18
19. A. Tironi, M. Trezza, E. Irassar, A. Scian, Thermal treatment of kaolin: effect on the pozzolanic activity, Procedia Materials Science 1 (2012) 343 – 350.
19
ORIGINAL_ARTICLE
TiO2/Gold nanocomposite as an extremely sensitive molecule sensor for NO2 detection: A DFT study
First-principles calculations within density functional theory (DFT) have been performed to investigate the interactions of NO2 molecules with TiO2/Gold nanocomposites in order to completely exploit the adsorption properties of these nanostructures. Given the need to further comprehend the behavior of the NO2 molecules positioned between the TiO2 nanoparticle and Au monolayer, we have geometrically optimized the complex systems consisting of the NO2 molecule oriented at appropriate positions between the nanoparticle and Au monolayer. The structural properties such as bond lengths, bond angles, adsorption energies and Mulliken population analysis and the electronic properties including the density of states and molecular orbitals have been also analyzed in detail. The results indicate that the interaction between NO2 and undoped TiO2-N/Gold nanocomposites is stronger than that between gas molecules and N-doped TiO2/Gold nanocomposites, which reveals that the pristine nanocomposite can react with NO2 molecule more efficiently. Therefore, the obtained results also suggest a theoretical basis for the potential applications of TiO2/Gold nanocomposites in gas sensing, which could help in the developing of novel TiO2 based advanced sensor devices.
https://www.jwent.net/article_20479_0f285e073f9ff5e2ed0b04697b9dd70d.pdf
2016-07-01
55
62
10.7508/jwent.2016.01.007
density functional theory
TiO2
NO2
TiO2/Gold nanocomposite
Density of states
Amirali
Abbasi
a_abbasi@azaruniv.edu
1
Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran
LEAD_AUTHOR
Jaber
Jahanbin Sardroodi
jsardroodi@azaruniv.edu
2
Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran
AUTHOR
Alireza
Rastkar Ebrahimzadeh
a_rastkar@azaruniv.edu
3
Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran
AUTHOR
1. A. Fujishima and K. Honda, 1972. Electrochemical Photolysis of Water at a Semiconductor Electrode. Nature, 238: 37–38.
1
2. A. Fujishima., K. Hashimoto and T. Watanabe, 1999. TiO2 Photocatalysis: Fundamentals and Applications, Bkc, Tokyo.
2
3. R. Erdogan., O. Ozbek and I. Onal, 2010. A periodic DFT study of water and ammonia adsorption on anatase TiO2 (001) slab. Journal of Surface science, 604:1029-1033.
3
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ORIGINAL_ARTICLE
Green synthesis of silver nanoparticles by Escherichia coli : Analysis of antibacterial activity
The emerging infectious diseases and the development of drug resistance in the pathogenic microorganism is a matter of serious concern. Despite the increased knowledge of microbial pathogenesis and application of modern therapeutics, the morbidity and mortality associated with the microbial infections still remains high. Therefore, there is a pressing demand to discover novel strategies and identify new antimicrobial agents to develop the next generation of drugs or agents to control microbial infections. The use of nanoparticles is gaining impetus in the present century as they possess defined chemical, optical and mechanical properties. In the present study green synthesis of silver nanoparticles by Escherichia coli has been done. Various parameters such as mixing ratio of culture supernatant and silver nitrate, media, temperature and pH for production of silver nanoparticles were optimised. The nanoparticles synthesised was characterized using SEM, FTIR and XRD. The antibacterial activity of silver nanoparticles synthesised using both pellet and supernatant against human pathogens Salmonella typhi, Vibrio cholerae, Bacillus subtilis and Klebsiella pneumoniae was analysed and MIC was calculated as 20µg and 50µg respectively.
https://www.jwent.net/article_20480_b4fd0809d485141b1721463bf75aae06.pdf
2016-07-01
63
74
10.7508/jwent.2016.01.008
Antimicrobial activity
Optimisation
Silver nanoparticles
Koilparambil
Divya
divyak2189@gmail.com
1
School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India
AUTHOR
Liya C.
Kurian
liyackn@gmail.com
2
School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India
AUTHOR
Smitha
Vijayan
smithaprakash00@gmail.com
3
School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India
AUTHOR
Jisha
Manakulam Shaikmoideen
jishams@mgu.ac.in
4
School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala, India
LEAD_AUTHOR
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