Primary biodegradation of sulfide mineral flotation collectors

被引：90

作者：

Chen, Shaohua ^{[1
]}

Gong, Wenqi ^{[1
]}

Mei, Guangjun ^{[1
]}

Zhou, Qi ^{[1
]}

Bai, Cuiping ^{[1
]}

Xu, Nian ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

来源：

MINERALS ENGINEERING | 2011年 / 24卷 / 08期

关键词：

Sulfide mineral flotation collectors; Aerobic biodegradation; Kinetics;

D O I：

10.1016/j.mineng.2011.01.003

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The primary aerobic biodegradation of several sulfide mineral flotation collectors has been studied, and the kinetic model of biodegradation is also discussed. The results show that sodium diethyldithiocarbamate, ammonium butyl-dithiophosphate, n-butyl xanthate can be readily biodegraded, their primary biodegradation extent can reach 97.1%, 93.7%, 81.8%, respectively in 8 d. However, ethylthionocarbamate is difficult to be biodegraded, with its primary biodegradation efficiency being only 37.3% in 8 d. The rate constants follow the order of: k(sodiurn) (diethyldithiocarbamate)>k(ammonium butyl-dithiophosphate)>k(n-butyl) (xanthate)>k(ethylthionocarbamate). Their aerobic biodegradation kinetics can be accurately described by first order reaction kinetics equations. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：953 / 955

页数：3

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