工业废水中Cr^3＋对厌氧微生物产甲烷毒性的研究  

Study on methanogenic toxicity to anaerobic microorganisms of Cr^(3+) in industrial wastewater

作　　者：罗亚红[1] 樊静[1] 何成达[2] 李怡帆[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,河南新乡453007 [2]扬州大学环境科学与工程学院,江苏扬州225009

出　　处：《工业水处理》2010年第8期33-35,共3页Industrial Water Treatment

基　　金：教育部博士点基金(200804760004)

摘　　要：在温度为(35±1)℃的厌氧条件下,间歇性进行了厌氧产甲烷毒性研究,探讨了不同浓度Cr3+对厌氧微生物的抑制程度和毒性机理。结果表明,Cr3+对厌氧污泥中的产甲烷菌的活性有较为显著的抑制,当Cr3+为50 mg/L时,为轻度抑制;当Cr3+为100~150 mg/L时,为中度抑制;当Cr3+>200 mg/L时,为重度抑制。毒性作用机理为:当Cr3+≤50 mg/L时为代谢性毒素,当Cr3+为100 mg/L时为生理性毒素,当Cr3+≥150 mg/L时为杀菌性毒素。The anaerobic methanogenic toxicity has been studied intermittently under anaerobic condition at the temperature of（35±1） ℃.The effects of inhibition extent and toxicity mechanism of Cr3＋ with different concentrations on anaerobic microorganisms are discussed.The results show that Cr3＋ has significant inhibiting effect on the activity of methanogenic bacteria in anaerobic sludge.It is slight inhibition,when Cr3＋ mass concentration is 50 mg/L;moder-ate inhibition,when its mass concentration is 100-150 mg/L;and severe inhibition,when its mass concentration is over 200 mg/L.The mechanism of toxic effects is metabolic toxins,when Cr3＋ mass concentration is less than 50 mg/L;physiological toxin,when Cr3＋ mass concentration is 100 mg/L;and bactericidal toxin,when Cr3＋ mass concen-tration is more than 150 mg/L.

关 键 词：工业废水 厌氧毒性 产甲烷活性 

分 类 号：X703.1[环境科学与工程—环境工程]