JWARP  Vol.8 No.10 , September 2016
Separation of Benzene, Toluene, Ethylbenzene and P-Xylene from Aqueous Solutions by Carbon Nanotubes/Polyvinylidene Fluoride Nanocomposite Membrane
Abstract: Carbon nanotubes/polyvinylidene fluoride (PVDF) nanocomposite membranes (abbreviated as CPMs) were fabricated to study their physicochemical property and separation efficiency of organic pollutants such as benzene, toluene, ethylbenzene and methylbenzene (abbreviated as BTEX) from aqueous solutions. The rejection coeffi-cients (R) of BTEX depend on the CNT content of CPM, pore size of membrane, molecule size of BTEX, permeation pressure (P), feed concentration (Cf) and temperature. The CNT contents were 5%, 10% and 15% in CPM have been conducted. The 10% CNT content of CPM (10-CPM) has not only higher water flux but also the relatively higher R as comparing of 5% and 15% CNT of CPM. The R decreased with increasing P, Cf and temperature but has no significant influence on ionic strength (μ). The R of BTEX were found in the order as B < T < E X which revealed the major mechanism of BTEX separation with CPM was related to molecule size of BTEX (B < T < E X). It exhibits that the size exclusion plays the important role in BTEX separation. According to the result of separation of BTEX by 10-CPM, the R of BTEX not only have above 80% with relative lower pressure but also have higher water flux as compared of other nano-filtration. This suggests that the 10-CPMs possess good potential for BTEX removal in wastewater treatment.
Cite this paper: Su, F. , Lu, C. and Tai, J. (2016) Separation of Benzene, Toluene, Ethylbenzene and P-Xylene from Aqueous Solutions by Carbon Nanotubes/Polyvinylidene Fluoride Nanocomposite Membrane. Journal of Water Resource and Protection, 8, 913-928. doi: 10.4236/jwarp.2016.810075.

[1]   Eckenfelder Jr., W.W. (1989) Industrial Water Pollution Control, Singapore. McGraw-Hill, Singapore.

[2]   Holt, J.K., Park, H.G., Wang, Y., Stadermann, M., Artyukhin, A.B., Grigoropoulos, C.P., Noy, A. and Bakajin, O. (2006) Fast Mass Transport Through Sub-2-Nanometer Carbon Nanotubes. Science, 312, 1034-1037.

[3]   Fornasiero, F., Park, H.G., Holt, J.K., Stadermann, M., Grigoropoulos, C.P., Noy, A. and Bakajin, O. (2008) Mechanism of Ion Exclusion by Sub-2nm Carbon Nanotube Membranes. Materials Research Society Symposium Proceedings, 1106, 1106-PP1103-1103.

[4]   Fornasiero, F., Park, H.G., Holt, J.K., Stadermann, M., Grigoropoulos, C.P., Noy, A. and Bakajin, O. (2008) Ion Exclusion by Sub-2-nm Carbon Nanotube Pores. Proceedings of the National Academy of Sciences, 105, 17250-17255.

[5]   Guo, S., Meshot, E.R., Kuykendall, T., Cabrini, S. and Fornasiero, F. (2015) Nanofluidic Transport through Isolated Carbon Nanotube Channels: Advances, Controversies, and Challenges. Advanced Materials, 27, 5726-5737.

[6]   Hummer, G., Rasaiah, J.C. and Noworyta, J.P. (2001) Water Conduction through the Hydrophobic Channel of a Carbon Nanotube. Nature, 414, 188-190.

[7]   Kim, S., Pechar, T.W. and Marand, E. (2006) International Congress on Membranes and Membrane Processes Poly(imide siloxane) and Carbon Nanotube Mixed Matrix Membranes for Gas Separation. Desalination, 192, 330-339.

[8]   Holt, J.K., Noy, A., Huser, T., Eaglesham, D. and Bakajin, O. (2004) Fabrication of a Carbon Nanotube-Embedded Silicon Nitride Membrane for Studies of Nanometer-Scale Mass Transport. Nano Letters, 4, 2245-2250.

[9]   Majumder, M., Chopra, N., Andrews, R. and Hinds, B.J. (2005) Nanoscale Hydrodynamics: Enhanced Flow in Carbon Nanotubes. Nature, 438, 44-44.

[10]   Kim, S., Jinschek, J.R., Chen, H., Sholl, D.S. and Marand, E. (2007) Scalable Fabrication of Carbon Nanotube/Polymer Nanocomposite Membranes for High Flux Gas Transport. Nano Letters, 7, 2806-2811.

[11]   Corry, B. (2008) Designing Carbon Nanotube Membranes for Efficient Water Desalination. The Journal of Physical Chemistry B, 112, 1427-1434.

[12]   Joseph, S. and Aluru, N.R. (2008) Why Are Carbon Nanotubes Fast Transporters of Water? Nano Letters, 8, 452-458.

[13]   Thomas, J.A. and McGaughey, A.J.H. (2008) Reassessing Fast Water Transport through Carbon Nanotubes. Nano Letters, 8, 2788-2793.

[14]   Goh, P.S., Ismail, A.F. and Ng, B.C. (2013) Carbon Nanotubes for Desalination: Performance Evaluation and Current Hurdles. Desalination, 308, 2-14.

[15]   Blocher, C., Dorda, J., Mavrov, V., Chmiel, H., Lazaridis, N.K. and Matis, K.A. (2003) Hybrid Flotation—Membrane Filtration Process for the Removal of Heavy Metal Ions from Wastewater. Water Research, 37, 4018-4026.

[16]   Bessbousse, H., Rhlalou, T., Verchère, J.F. and Lebrun, L. (2008) Removal of Heavy Metal Ions from Aqueous Solutions by Filtration with a Novel Complexing Membrane Containing Poly(Ethyleneimine) in a Poly(Vinyl Alcohol) Matrix. Journal of Membrane Science, 307, 249-259.

[17]   Mostafavi, S.T., Mehrnia, M.R. and Rashidi, A.M. (2009) Issues 1 and 2: First International Workshop between the Center for the Seawater Desalination Plant and the European Desalination Society Preparation of Nanofilter from Carbon Nanotubes for Application in Virus Removal from Water. Desalination, 238, 271-280.

[18]   Shawky, H.A., Chae, S.-R., Lin, S. and Wiesner, M.R. (2011) Synthesis and Characterization of a Carbon Nanotube/Polymer Nanocomposite Membrane for Water Treatment. Desalination, 272, 46-50.

[19]   Bakajin, O., Noy, A., Fornasiero, F., Grigoropoulos, C.P., Holt, J.K., In, J.B., Kim, S. and Park, H.G. (2014) Chapter 11: Nanofluidic Carbon Nanotube Membranes: Applications for Water Purification and Desalination. In: Sustich, R., Duncan, J. and Savage, N., Eds., Nanotechnology Applications for Clean Water, 2nd Edition, William Andrew Publishing, Oxford, 173-188.

[20]   Kim, J.-H. and Lee, S.-H. (2002) Molecular Dynamics Simulation Studies of Benzene, Toluene, and p-Xylene in a Canonical Ensemble. Bulletin of the Korean Chemical Society, 23, 441-446.

[21]   Zhai, G., Ying, L., Kang, E.T. and Neoh, K.G. (2002) Poly(Vinylidene Fluoride) with Grafted 4-Vinylpyridine Polymer Side Chains for pH-Sensitive Microfiltration Membranes. Journal of Materials Chemistry, 12, 3508-3515.

[22]   Su, F., Lu, C. and Chen, H.-S. (2011) Adsorption, Desorption, and Thermodynamic Studies of CO2 with High-Amine-Loaded Multiwalled Carbon Nanotubes. Langmuir, 27, 8090-8098.

[23]   Dresselhaus, M.S., Dresselhaus, G. and Saito, R. (1995) NanotubesPhysics of Carbon Nanotubes. Carbon, 33, 883-891.

[24]   Saito, Y., Yoshikawa, T., Bandow, S., Tomita, M. and Hayashi, T. (1993) Interlayer Spacings in Carbon Nanotubes. Physical Review B, 48, 1907-1909.

[25]   Su, F., Lu, C. and Hu, S. (2010) Adsorption of Benzene, Toluene, Ethylbenzene and p-Xylene by NaOCl-Oxidized Carbon Nanotubes. Colloids and Surfaces A: Physico-chemical and Engineering Aspects, 353, 83-91.

[26]   Luo, M.-L., Zhao, J.-Q., Tang, W. and Pu, C.-S. (2005) Hydrophilic Modification of Poly(ether Sulfone) Ultrafiltration Membrane Surface by Self-Assembly of TiO2 Nano-particles. Applied Surface Science, 249, 76-84.

[27]   Miyauchi, M., Kieda, N., Hishita, S., Mitsuhashi, T., Nakajima, A., Watanabe, T. and Hashimoto, K. (2002) Reversible Wettability Control of TiO2 Surface by Light Irradiation. Surface Science, 511, 401-407.

[28]   Vrijenhoek, E.M., Hong, S. and Elimelech, M. (2001) Influence of Membrane Surface Properties on Initial Rate of Colloidal Fouling of Reverse Osmosis and Nanofiltration Membranes. Journal of Membrane Science, 188, 115-128.

[29]   Al-Jeshi, S. and Neville, A. (2006) An Investigation into the Relationship between Flux and Roughness on RO Membranes Using Scanning Probe Microscopy. Selected Paper from the 10th Aachen Membrane Colloquium. Desalination, 189, 221-228.

[30]   Escobar, I.C., Hong, S. and Randall, A.A. (2000) Removal of Assimilable Organic Carbon and Biodegradable Dissolved Organic Carbon by Reverse Osmosis and Nanofiltration Membranes. Journal of Membrane Science, 175, 1-17.

[31]   Sharma, R.R. and Chellam, S. (2006) Temperature and Concentration Effects on Electrolyte Transport across Porous Thin-Film Composite Nanofiltration Membranes: Pore Transport Mechanisms and Energetics of Permeation. Journal of Colloid and Interface Science, 298, 327-340.

[32]   Gethard, K., Sae-Khow, O. and Mitra, S. (2011) Water Desalination Using Carbon-Nano-tube-Enhanced Membrane Distillation. ACS Applied Materials & Interfaces, 3, 110-114.