[用于评估重金属对活性污泥抑制作用的TTC和INT-电子传输系统活性测试]

[Evaluation of TTC and INT-electron transport system activity tests for heavy metal inhibition of activated sludge].

作者信息

Yin Jun, Tan Xue-jun, Ren Nan-qi

机构信息

School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.

出版信息

Huan Jing Ke Xue. 2005 Jan;26(1):56-62.

PMID:15859409

Abstract

The effects of Cu2+, Zn2+, Cd2+, Hg2+, Ni2+, Pb2+ and Ag+ on TTC and INT-electron transport system activity are studied and the sensitivities of TTC and INT-electron transport system activity to seven tested heavy metals are compared to evaluate both the parameters for assessing heavy metal inhibition of activated sludge. The median inhibitory concentration (IC50) of seven tested heavy metals measured via TTC-electron transport system activity is less than that measured via INT-electron transport system activity, which indicates that the INT-electron transport system activity is less sensitive to heavy metals than the TTC-electron transport system activity. The ranking of tested heavy metals in order of decreasing toxicity based on TTC-electron transport system activity was Hg2+, Cd2+, Cu2+, Ag+, Zn2+, Ni2+ and Pb2+ , and the ranking based on INT-electron transport system activity was Hg2+, Ag+, Cu2+, Cd2+, Zn2+, Ni2+ and Pb2+.

摘要

研究了Cu2+、Zn2+、Cd2+、Hg2+、Ni2+、Pb2+和Ag+对TTC和INT电子传递系统活性的影响，并比较了TTC和INT电子传递系统活性对七种受试重金属的敏感性，以评估用于评估活性污泥中重金属抑制作用的两个参数。通过TTC电子传递系统活性测得的七种受试重金属的半数抑制浓度（IC50）低于通过INT电子传递系统活性测得的结果，这表明INT电子传递系统活性对重金属的敏感性低于TTC电子传递系统活性。基于TTC电子传递系统活性，受试重金属毒性由高到低的排序为Hg2+、Cd2+、Cu2+、Ag+、Zn2+、Ni2+和Pb2+；基于INT电子传递系统活性的排序为Hg2+、Ag+、Cu2+、Cd2+、Zn2+、Ni2+和Pb2+。