摘要
不同价态的铁元素氧化还原性不同,对有机物的厌氧生物降解过程的影响也不同.以邻氯苯酚和硝基苯为目标污染物,投铁量为20～100mg/L的条件下,单质铁能加速硝基苯的厌氧降解,对2-氯酚降解的影响则很小;二价铁和三价铁对两种物质都表现出一定的抑制作用,投加浓度越高,抑制作用越明显.
Iron with different chemical valence has different oxidation-reduction potential, and has different effects on anaerobic biodegradation of organics. Different effects of iron on 2-chlorophenol and nitrobenzene anaerobic biodegradation were observed in the presence of iron ranging from 20 mg/L to 100mg/L. Under such dosage, Fe^0 resulted in accelerating the nitrobenzene degradation, but had no clearly influence on 2-chlorophenol. In case of Fe^2＋ and Fe^3＋ , the anaerobic biodegradation activity of both 2-chlorophenol and nitrobenzene were inhibited in a certain degree. The higher the concentration of iron is, the stronger the inhibition is.
出处
《四川环境》
2005年第6期14-16,共3页
Sichuan Environment
基金
国家863计划重大专项<高级催化还原技术与设备>(20025AA601270)
关键词
铁元素
2-氯酚
硝基苯
厌氧生物降解
氧化还原电位
Iron
2-chlorophenol
nitrobenzene
anaerobic biodegradation
oxidatlon-reduction potential
