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TiO2纳滤膜对重金属离子的截留性能

作者：董国祥，朱瓌之，李世大，漆虹

单位：材料化学工程国家重点实验室，南京工业大学膜科学技术研究所，南京 210009

关键词：陶瓷纳滤膜；TiO2；重金属离子；离子截留

DOI号：

分类号： TQ028.5

出版年,卷(期):页码： 2012,32(1):59-63

摘要：

采用孔径为1.5 nm的TiO2纳滤膜，在压力0.4~0.8 MPa，pH值3~7的条件下，考察了膜对浓度范围为50~500 mg•L-1的Cu(NO3)2、Ni(NO3)2、ZnCl2和CdCl2四种单组份重金属溶液的截留性能。结果表明：除Cd2+外，膜对重金属离子的截留率随溶液浓度的增大先增大，当浓度达到200 mg•L-1后趋于稳定；升高压力膜的离子截留率会略有增加；当pH=6时，膜对Ni2+和Cd2+的截留率最低，而对Cu2+和Zn2+的截留率在pH=5~6时达到最高。TiO2膜对Cu2+、Ni2+、Zn2+和Cd2+的最高截留率分别可以达到96.9 %、95.9 %、92.5 %和83.2 %。

Retention properties of TiO2 nanofiltration membrane ( with mean pore size of 1.5 nm ) with respect to the heavy metal salt solutions, namely Cu(NO3)2, Ni(NO3)2, ZnCl2 and CdCl2 were investigated. The effects of processing parameters, such as pH, transmembrane pressure and concentration of heavy metal ions, on membrane retention rate were studied in detail. Results show that heavy metal ions rejection of membrane increases at first with concentration while does not vary too much as the concentration reaches 200 mg•L-1. But this is not for Cd2+. Retention properties of membrane increases slightly as the transmembrane pressure elevated. The membrane exhibits minimal retention properties towards Ni2+ and Cd2+ at a pH value of 6, where the maximal retention rate towards Cu2+ and Zn2+ can be found. Retention properties of TiO2 nanofiltration membrane towards Cu2+, Ni2+, Zn2+ and Cd2+ can reach maximum values of 96.9 %, 95.9 %, 92.5 % and 83.2 %, respectively.

基金项目：

国家自然科学基金青年基金(20906047)；化学工程联合国家重点实验室开放基金资助项目(SKL-ChE-09A01)；材料化学工程国家重点实验室自主课题（ZK 201002）；江苏省高校然科学研究项目（11KJB530006），

作者简介：

董国祥(1985-)，男，江苏盐城人，硕士生，主要从事多孔陶瓷膜支撑体的制备. * 通讯联系人，E-mail: hqinjut@yahoo.com.cn，电话：025-83172279，传真：025-83172292.

参考文献：

[1] Gestel T V, Vandecasteele C, Buekenhoudt A. Salt retention in nanofiltration with multilayer ceramic TiO2 membranes [J]. J Membr Sci, 2002, 209: 379~389.
[2] Ahn K H, Song K G, Cha H Y et al. Removal of ions in nickel electroplating rinse water using low-pressure nanofiltration [J]. Desalination, 1999, 122: 77~84.
[3] Ballet G T, Gzara L, Hafiane A, et al. Transport coefficients and cadmium salt rejection in nano?ltration membrane [J]. Desalination, 2004, 167: 369~376.
[4] Qdais H A, Moussa H. Removal of heavy metals from wastewater by membrane processes: a comparative study [J]. Desalination, 2004, 164: 105~110.
[5] 高以烜, 王黎霓. 膜分离技术用于电镀废水处理的发展与问题[J]. 北京工业大学学报, 1990, 16(3): 86~93.
[6] 漆虹, 李世大, 江晓骆, 等. TiO2纳滤膜的制备及其离子截留性能[J]. 无机材料学报, 2011, 26(3): 305~310.
[7] 漆虹, 邢卫红, 范益群. γ-Al2O3中孔陶瓷膜的制备及表征[J]. 化工学报, 2009, 60(10): 2628~2632.
[8] 漆虹, 江晓骆, 韩静, 等. ZrO2中孔膜的制备及其耐酸碱腐蚀性能[J]. 过程工程学报, 2009, 9(6): 1216~1221.
[9] Murthy Z V P, Chaudhari L B. Separation of binary heavy metals from aqueous solutions by nano?ltration and characterization of the membrane using Spiegler–Kedem model [J]. Chem Eng J, 2009, 150: 181~187.
[10] Garba Y, Taha S, Cabon J, et al. Modeling of cadmium salts rejection through a nano?ltration membrane: relationships between solute concentration and transport parameters [J]. J Membr Sci, 2003, 211: 51~58.
[11] Paugam L, Tahaet S, Dorange G, et al. Mechanism of nitrate ions transfer in nanofiltration depending on pressure, pH, concentration and medium composition [J]. J Membr Sci, 2004, 23: 137~46.
[12] Mehiguene K, Garba Y, Taha S et al. In?uence of operating conditions on the retention of copper and cadmium in aqueous solutions by nanofiltration: experimental results and modeling. Sep Purif Technol, 1999, 15: 181~187.
[13] Peeters J M M, Mulder M H V, Strathmann H. Streaming potential measurements as a characterization method for nanofiltration membranes [J]. Colloids Surf, A Colloids and Surfaces A, 1999, 150: 247~259.
[14] Schaep J, Vandecasteele C, Peeters B et al. Characteristics and retention properties of a mesoporous ?-Al2O3 membrane for nanofiltration [J]. J Membr Sci, 1999, 163(2): 229~237.
[15] Frarès N B, Taha S, Dorange G. Influence of the operating conditions on the elimination of zinc ions by nanofiltration [J]. Desalination, 2005, 185: 245~253.
[16] Belkhouche N E, Didi M A, Taha S et al. Zinc rejection from leachate solutions of industrial solid waste—effects of pressure and concentration on nanofiltration membrane performance [J]. Desalination, 2009, 239: 58~65.

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