Combined nano-membrane technology for removal of lead ions

被引：79

作者：

Hajdu, Istvan ^{[1
]}

Bodnar, Magdolna ^{[1
]}

Csikos, Zsuzsanna ^{[1
]}

Wei, Shi ^{[5
]}

Daroczi, Lajos ^{[3
]}

Kovacs, Bela ^{[4
]}

Gyori, Zoltan ^{[4
]}

Tamas, Janos ^{[2
]}

Borbely, Janos ^{[1
,2
]}

机构：

[1] BBS Nanotechnol Ltd, H-4225 Debrecen 16, Hungary

[2] Univ Debrecen, Dept Water & Environm Management, H-4010 Debrecen, Hungary

[3] Univ Debrecen, Dept Solid State Phys, H-4010 Debrecen, Hungary

[4] Univ Debrecen, Inst Food Proc Qual Assurance & Microbiol, H-4010 Debrecen, Hungary

[5] S China Univ Technol, Guangzhau, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2012年 / 409卷

关键词：

Poly-gamma-glutamic acid; Lead ion; Nanoparticles; Removal; Ultrafiltration; Biosorption; HEAVY-METAL IONS; ENHANCED ULTRAFILTRATION PROCESS; GAMMA-GLUTAMIC ACID; AQUEOUS-SOLUTIONS; CADMIUM REMOVAL; WATER TREATMENT; CHROMIUM IONS; COMPLEXATION; SEPARATION; ADSORPTION;

D O I：

10.1016/j.memsci.2012.03.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The removal of toxic lead ions from aqueous solution by a combined nano-membrane separation technique was investigated. Biodegradable poly-gamma-glutamic acid (gamma-PGA), a linear biopolymer, and its cross-linked nanoparticles were used to capture the metal ions by forming nanosized particles. The polymer-metal ion particles, with sizes in the range of 80-350 nm, were then removed by membrane separation. Two ultrafiltration techniques were studied with the aim of developing a nanoparticle-enhanced separation process for the efficient removal of lead ions from aqueous solution. The influence of parameters such as the feed lead ion and gamma-PGA concentrations and their proportions, the gamma-PGA cross-linking ratio and the pH of the solution on the lead-removal efficiency and permeate flux was studied. It was found that gamma-PGA could bind and remove more than 99.8% of the lead ions from water through a convenient, low-pressure ultrafiltration technique, resulting in a permeate that satisfied the standard for drinking water recommended by the WHO. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：44 / 53

页数：10

共 56 条

[1] Chemically modified cellulosic adsorbent for divalent cations removal from aqueous solutions [J].