Separation of ammonium salts from coking wastewater with nanofiltration combined with diafiltration

被引：38

作者：

Yin, Na ^{[1
]}

Yang, Gang ^{[1
]}

Zhong, Zhaoxiang ^{[1
]}

Xing, Weihong ^{[1
]}

机构：

[1] Nanjing Univ Technol, Membrane Sci & Technol Res Ctr, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

来源：

DESALINATION | 2011年 / 268卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Coking wastewater; Ammonium salt; Nanofiltration; Diafiltration; REVERSE-OSMOSIS; REMOVAL; ULTRAFILTRATION; MEMBRANES; NITRATE; MODE;

D O I：

10.1016/j.desal.2010.10.034

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

It is rather difficult to separate high concentration of ammonium thiosulfate from ammonium thiocyanate in coking wastewater which results in resources waste and environment pollution. In this work, a membrane process of nanofiltration (NF) was applied to solve the problem. The experimental results showed that the NF membrane selectively retained (NH4))(2)S2O3 with a rejection of 95.0% at a concentration of more than 60 g L-1 Meanwhile, the permeation of NH4SCN was 120.0% at a concentration of nearly 120 g L-1 Diafiltration was optimized to ensure a high average salt rejection of 93.4% for (NH4)(2)S2O3. In addition, salt concentrations and yields can be predicted by theoretical calculation. The results reveal that the NF membranes are successful in separating high concentration of hi-component ammonium salt solutions into mono-component ones. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：233 / 237

页数：5

共 27 条

[1] Fouling strategies and the cleaning system of NF membranes and factors affecting cleaning efficiency [J].