Integrated ultrafiltration-nanofiltration membrane processes applied to the treatment of gold mining effluent: Influence of feed pH and temperature

被引：12

作者：

Andrade, L. H. ^{[1
]}

Aguiar, A. O. ^{[1
]}

Pires, W. L. ^{[1
]}

Miranda, G. A. ^{[1
]}

Amaral, M. C. S. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Sanit & Environm Engn, Ave Antonio Carlos 6627, Belo Horizonte, MG, Brazil

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2017年 / 52卷 / 04期

关键词：

Feed pH and temperature; gold mining acid effluent; nanofiltration; ultrafiltration; zeta potential; TEXTILE WASTE-WATER; ARSENIC REMOVAL; REVERSE-OSMOSIS; NF MEMBRANES; PERFORMANCE; REJECTION; SALT; RECLAMATION; MIXTURES; CHARGE;

D O I：

10.1080/01496395.2016.1262419

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study aimed to evaluate the effect of feed pH (2.2 - original effluent pH - up to 6.0) and temperature (20 up to 40 degrees C) on the performance of integrated ultrafiltration (UF) and nanofiltration (NF) applied to gold mining effluent. pH increase led to a significant decrease in UF permeate flux. NF showed high retention efficiencies of ions when temperature was below 30 degrees C. Retention of high-valence counter-ions to balance the charge of retained co-ions seemed to be the strongest NF mechanisms. Process performance at feed pH of 5.0 was superior in terms of fouling, retention efficiency, and investment cost.

引用

页码：756 / 766

页数：11

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