摘要
以硝基苯废水处理反应器内的污泥为菌源,采用间歇反应的方法分别考察Fe3+,Ni2+,Zn2+,Al3+,Cr(Ⅵ)和Cu2+6种金属离子及盐度对硝基苯厌氧生物降解过程的影响.结果表明,适宜质量浓度的Fe3+,Ni2+,Zn2+,Al3+和Cr(Ⅵ)可促进硝基苯的降解.当ρ(Fe3+)为5mg/L,ρ(Ni2+),ρ(Zn2+)和ρ(Al3+)为1.0mg/L及ρ〔Cr(Ⅵ)〕为0.50mg/L时,硝基苯的降解速率提高5%～23%.当ρ(Fe3+),ρ(Ni2+),ρ(Zn2+),ρ(Al3+),ρ〔Cr(Ⅵ)〕和ρ(Cu2+)分别大于50,10.0,5.0,5.0,5.0和0.25mg/L时,金属离子开始对硝基苯降解菌产生抑制作用,毒性顺序为Cu2+>Cr(Ⅵ)>Al3+>Zn2+>Ni2+>Fe3+.硝基苯降解菌生长的最佳盐度为0.25%～1.00%.
The effects of six metal ions including Fe^3＋, Ni^2＋, Zn^2＋, Al^3＋ , Cr（Ⅵ）, Cu^2＋, and salinity on anaerobic degradation of nitrobenzene were investigated in batch reactors. Nitrobenzene degradation bacteria were obtained from a reactor for nitrobenzene wastewater. The results showed that preferable mass concentrations of Fe^3＋, Ni^2＋, Zn^2＋, Al^3＋ and Cr（Ⅵ） had accelerated nitrobenzene degradation. When their mass concentrations were 5, 1.0, 1.0, 1.0 and 0.5 mg/L respectively, the nitrobenzene degradation rate increased by 5 %-23 % . However, nitrobenzene degradation bacteria were inhibited when their mass concentrations exceeded 50, 10.0, 5.0, 5.0, 5.0 and 0.25 mg/L respectively. Toxicity order in mass was Cu^2＋〉 Cr（Ⅵ） 〉 Al^3＋〉 Zn^2＋〉 Ni^＋2 〉 Fe^3＋. Optimal salinity for nitrobenzene degradation bacteria was between 0.25% and 1.00%.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2009年第1期99-102,共4页
Research of Environmental Sciences
基金
国家自然科学基金项目(50278036
50708039)
教育部新教师基金
关键词
金属离子
盐度
硝基苯
生物降解
metal ions
salinity
nitrobenzene
biodegradation
