硫酸盐还原菌的脱硫性能和铁还原性能  

Sulfate and ferric reducing performances of a sulfate reducing bacterium

作　　者：陈明翔[1] 周集体[1] 路达[1,2] 张玉[1] 

机构地区：[1]大连理工大学环境学院,工业生态与环境工程教育部重点实验室,辽宁大连116024 [2]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2014年第6期610-615,636,共7页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51078056);工业生态与环境工程教育部重点实验室基金资助项目(KLIEEE-08-09)

摘　　要：研究了硫酸盐还原菌(sulfate-reducing bacteria,SRB)Desulfovibriosp.CMX在不同pH值、碳源、初始硫酸根(SO2-4)浓度条件下的脱硫能力,并研究了D.sp.CMX在不存在SO2-4的情况下的Fe(Ⅲ)EDTA(EDTA:乙二胺四乙酸)还原能力.结果表明,在pH=7,碳源为乳酸钠时,D.sp.CMX的脱硫效果最好.SO2-4的初始浓度越大,60h时的SO2-4去除率越低.在不存在SO2-4的情况下,D.sp.CMX可以直接将Fe(Ⅲ)EDTA生物还原成Fe(Ⅱ)EDTA,在Fe(Ⅲ)EDTA的浓度达到25mmol/L时,菌株的铁还原率仍可达到62.51%.但是,随着Fe(Ⅲ)EDTA浓度的升高,D.sp.CMX的生长量下降.通过此阶段的研究,为进一步进行化学吸收结合生物还原同步脱硫脱硝实验研究提供了理论依据.The sulfate reducing performances of the sulfate reducing bacteria（SRB）,Desulfovibrio sp.CMX,was studied in different pH values,carbon sources,and sulfate concentrations.The Fe（Ⅲ）EDTA（EDTA：ethylenediaminetetraacetic acid）reducing performance of D.sp.CMX in absence of sulfate was also studied.It was showed that the sulfate removing effect of D.sp.CMX was best when pH was 7and lactate was the carbon source.The sulfate removal efficiencies decreased with the increased the initial sulfate concentrations.Fe（Ⅲ）EDTA could be directly reduced to Fe（Ⅱ）EDTA by D.sp.CMX.Fe（Ⅲ）EDTA reduction efficiencies was 62.51%in presence of 25mmol/L Fe（Ⅲ）EDTA.However,cell protein concentrations decreased with the increase Fe（Ⅲ）EDTA concentrations.This study provided a theoretical basis for simul-taneous desulfurization and denitrification by chemical absorption combined with biological reduction.

关 键 词：硫酸盐还原菌 脱硫性能 铁还原 同时脱硫脱硝 

分 类 号：X172[环境科学与工程—环境科学]