剪切强化络合-超滤技术处理含锰废水  

Treatment of Manganese-Containing Wastewater by Shear-Induced Complexation-Ultrafiltration

作　　者：钦梦园 邱运仁[1] QIN Meng-yuan;QIU Yun-ren(School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学化学化工学院

出　　处：《矿冶工程》2020年第1期92-95,100,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(21476265)

摘　　要：在络合-超滤过程中引入旋转盘强化过滤过程处理含锰废水,选择马来酸-丙烯酸共聚物(PMA)作为络合剂,主要探究了PMA和Mn(Ⅱ)形成络合物PMA-Mn的剪切稳定性。实验结果表明,pH=6、P/M(络合剂/金属离子质量浓度比)=12为PMA与Mn(Ⅱ)的最佳络合条件,此时Mn(Ⅱ)截留率高达99.1%;pH=4、5、6时,PMA-Mn络合物分别在800、1200、1400 r/min临界转速下发生解络,对应的临界剪切速率分别为5.32×10^4、1.10×10^5和1.47×10^5 s^-1;通过剪切诱导解络,可高效再生PMA。A rotating disk was introduced into the complexation-ultrafiltration process to strengthen the filtration of manganese-containing wastewater and maleic acid-acrylic acid copolymer(PMA)was selected as the complexing agent to investigate thoroughly the shear stability of PMA-Mn complex formed by PMA and Mn(Ⅱ).The test results show that with the best complexing condition for PMA and Mn(Ⅱ),including pH value of 6 and P/M(mass concentration ratio of complexing agent to metal ion)of 12,the retention rate of Mn(Ⅱ)can reach 99.1%.When the pH value is 4,5,and 6,respectively,the decomplexation of PMA-Mn can be occurred at critical speeds of 800,1200,and 1400 r/min,with the corresponding critical shear rates at 5.32×10^4、1.10×10^5 and 1.47×10^5 s^-1.It is shown that PMA can be efficiently regenerated by shear-induced decomplexation.

关 键 词：马来酸-丙烯酸共聚物 络合剂 旋转盘 络合-超滤 剪切强化 膜分离技术 解络 废水处理 锰离子 

分 类 号：X703[环境科学与工程—环境工程]