摘要
针对复合污染原水中锰和天然有机物的同步去除问题,研究了亚铁/过氧单硫酸盐(Fe^(2+)/PMS)体系的去除途径和效果。结果表明:在复合污染条件下,当原水中Mn^(2+)由0增加至1.0mg/L时,Fe^(2+)/PMS体系对DOC和UV254的去除率分别提高了7.39%和3.58%,而出水锰浓度为0.01~0.79μg/L,表明Fe^(2+)/PMS体系可以同步去除复合污染原水中的锰和天然有机物。机理分析表明,Mn2+的存在促进了Fe^(2+)/Fe^(3+)循环,强化自由基产生的同时促进了Fe^(3+)的生成,且其氧化产物Mn O_(2)具有较好的助凝作用。动力学分析表明,Mn2+对Fe^(2+)/PMS体系的强化作用主要在慢速反应阶段,提高了对有机物的去除效果。
To achieve simultaneous removal of manganese and natural organic matter from combined polluted raw water,the removal pathway and performance of ferrous/peroxymonosulfate(Fe^(2+)/PMS)system were investigated.When the Mn^(2+)concentration in combined polluted raw water increased from 0 to 1.0 mg/L,the removal rates of DOC and UV_(254)in the Fe^(2+)/PMS system increased by 7.39%and3.58%,respectively,and the manganese concentration in effluent ranged from 0.01μg/L to 0.79μg/L,indicating that the system could be used for simultaneous removal of manganese and natural organic matter from combined polluted raw water.The mechanism analysis showed that the presence of Mn^(2+)promoted the Fe^(2+)/Fe^(3+)cycle,enhanced the formation of free radicals and promoted the formation of Fe^(3+),and its oxidation product Mn O_2 had a good coagulation performance.The kinetic analysis showed that Mn^(2+)enhanced the coagulation of Fe^(2+)/PMS system mainly at the slow reaction stage,thus improved the removal efficiency of organic matter.
作者
陶辉
顾颖
林涛
蒋福春
张雪
TAO Hui;GU Ying;LIN Tao;JIANG Fu-chun;ZHANG Xue(Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakers<Ministry of Education>,Hohai University,Nanjing 210098,China;College of Environment,Hohai University,Nanjing 210098,China;Nanjing Water Group,Nanjing 210002,China;Suzhou Water Supply Co.Ltd.,Suzhou 215124,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第15期64-69,共6页
China Water & Wastewater
基金
国家重点研发计划项目(2022YFC3203702)。
关键词
亚铁
过氧单硫酸盐
复合污染
锰
天然有机物
同步去除
ferrous
peroxymonosulfate
combined pollution
manganese
natural organic matter
simultaneous removal
