厌氧活性污泥处理废水中的U(Ⅵ)  

U(Ⅵ) removal from wastewater by anaerobic sludge

作　　者：苑士超[1] 谢水波[1,2] 李仕友[1,2] 刘金香[1,2] 刘迎九[1] 唐振平[2] 

机构地区：[1]南华大学污染控制与资源化技术湖南省重点实验室,衡阳421001 [2]南华大学铀矿冶生物技术国防重点学科实验室,衡阳421001

出　　处：《环境工程学报》2013年第6期2081-2086,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(11175081);湖南省科技计划重点项目(2011SK2015);湖南省创新平台基金项目(09K076)

摘　　要：用人工驯养的厌氧污泥进行除铀实验,探讨了微生物投加量(VSS)、pH值、U(Ⅵ)初始浓度、外加电子供体和污泥重复利用等对污泥处理U(Ⅵ)的影响,并进行了相关机理分析。实验结果表明,在适当的pH范围内(5.2～6.6),厌氧污泥对铀保持较长时间的高效去除率;当以还原铁粉和无水乙醇作电子供体时,U(Ⅵ)去除率保持在95%以上的时间为未加电子供体时的2倍。U(Ⅵ)去除速度与VSS投加量成正比关系,U(Ⅵ)初始浓度对去除效果的影响不大,厌氧污泥可以长期使用。pH值的影响最关键,其次是外加电子供体。厌氧污泥除U(Ⅵ)机理为氧化还原和吸附的共同作用。This paper focused on the bioremediation ability of anaerobic sludge which artificially domestica- ted. The affecting factors such as different VSS dosages, pH, U （ WI ） initial concentration, addition of electron donors, reuse of anaerobic sludge were studied by batch experiments and the mechanisms for U （WI） removal were discussed. The results showed that pH is one of the key factors which influenced the experiment. High U （WI） removal rate could be reached only under proper pH （5.2 - 6.6）. Batch experiment which added zero- valent iron or ethanol as electron donors showed 2 times longer time lasted with high U （ VI ） removal ratio of 95%. The speed of U（VI） removal was in proportion to the VSS dosage. Different initial U（VI） concentrations have little influence on U （ WI ） removal rate. The anaerobic sludge can be reused and the mechanisms for U （ Wl ） removal are redox and adsorption.

关 键 词：U(Ⅵ) 厌氧污泥 吸附 氧化还原 含铀废水 

分 类 号：X522[环境科学与工程—环境工程]