生物聚合硫酸铁去除U(Ⅵ)的絮凝试验  

Flocculation Experiment on Removal of Uranium(Ⅵ)with Bio-polymeric Ferric Sulfate

作　　者：宫志恒 郭怡秦 郭亚丹[1] 王学刚[1] 李鹏[1] 高柏[1] GONG Zhi-heng;GUO Yi-qin;GUO Ya-dan;WANG Xue-gang;LI Peng;GAO Bai(School of Water Resources ＆ Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《有色金属（冶炼部分）》2018年第11期71-75,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省自然科学基金项目(20171BAB213019);江西省博士后科研择优资助项目(2016KY33);东华理工大学研究生创新项目(YC2017-S281;DHYC-201818)

摘　　要：采用生物聚合硫酸铁絮凝剂对低浓度含铀废水进行絮凝试验研究,考察U(Ⅵ)溶液pH、絮凝剂投加量以及U(Ⅵ)初始浓度对絮凝效果的影响。结果表明,反应最佳pH范围在5~7,反应平衡时间为5min,其絮凝过程符合Lagergren准二级反应动力学模型。含铀废水经生物聚合硫酸铁絮凝处理过后,残余铀浓度低于《铀加工与燃料制造设施辐射防护规定》(EJ 1056—2005)中的排放限值(0.05mg/L)。Bio-polymerized ferric sulfate flocculant was prepared by microbiological method to flocculate low-concentration uranium wastewater.Effects of pH value of U（Ⅵ）solution,flocculant dosage and initial concentration of U（Ⅵ）on flocculation effect were investigated.The results show that the optimum pH value of reaction is 5～7,and reaction equilibrium time is 5 min.Process of flocculation follows Lagergren quasi-secondary reaction kinetics model.After flocculation by bio-polymerized ferric sulfate,the residual uranium concentration is lower than the emission limit in the Radiation Protection Regulations for Uranium Processing and Fuel Manufacturing Facilities（EJ 1056-2005,0.05 mg/L）.

关 键 词：生物聚合硫酸铁 铀 絮凝 动力学 

分 类 号：TL941.19[核科学技术—辐射防护及环境保护]