Phosphonate removal from discharged circulating cooling water using iron-carbon micro-electrolysis

被引：23

作者：

Zhou, Zhen ^{[1
]}

Qiao, Weimin ^{[1
]}

Lin, Yangbo ^{[1
]}

Shen, Xuelian ^{[1
]}

Hu, Dalong ^{[1
]}

Zhang, Jianqiao ^{[1
]}

Jiang, Lu-Man ^{[1
]}

Wang, Luochun ^{[1
]}

机构：

[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China

来源：

WATER SCIENCE AND TECHNOLOGY | 2014年 / 70卷 / 03期

关键词：

circulating cooling water; iron-carbon micro-electrolysis; phosphonate; response surface methodology; WASTE-WATER; DEGRADATION; MICROELECTROLYSIS; SYSTEM;

D O I：

10.2166/wst.2014.248

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Phosphonate is a commonly used corrosion and scale inhibitor for a circulating cooling water (CCW) system. Its discharge could cause eutrophication of receiving waters. The iron-carbon (Fe/C) micro-electrolysis technology was used to degrade and remove phosphonate from discharged CCW. The influences of initial pH, Fe/C ratio (FCR) and temperature on phosphonate removal were investigated in a series of batch tests and optimized by response surface methodology. The quadratic model of phosphonate removal was obtained with satisfactory degrees of fitness. The optimum conditions with total phosphorus removal efficiency of 95% were obtained at pH 7.0, FCR of 1.25, and temperature of 45 degrees C. The phosphonate removal mechanisms were also studied. Phosphonate removal occurred predominantly via two consecutive reactive phases: the degradation of phosphonate complexes (Ca-phosphonate) and the precipitation of Fe/C micro-electrolysis products (PO43-, Ca2+ and Fe3+).

引用

页码：524 / 532

页数：9

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