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EDDS螯合Fe(Ⅲ)活化过硫酸盐技术对TCE的降解效果

王琰涤 吕树光 顾小钢 邱兆富 隋 倩 郭旭虹

王琰涤, 吕树光, 顾小钢, 邱兆富, 隋 倩, 郭旭虹. EDDS螯合Fe(Ⅲ)活化过硫酸盐技术对TCE的降解效果[J]. 环境科学研究, 2015, 28(11): 1728-1733.
引用本文: 王琰涤, 吕树光, 顾小钢, 邱兆富, 隋 倩, 郭旭虹. EDDS螯合Fe(Ⅲ)活化过硫酸盐技术对TCE的降解效果[J]. 环境科学研究, 2015, 28(11): 1728-1733.
WANG Yandi, L Shuguang, GU Xiaogang, QIU Zhaofu, SUI Qian, GUO Xuhong. The Degradation Performance of Trichloroethylene by Means of Fe(Ⅲ)-EDDS Activated Persulfate Process[J]. Research of Environmental Sciences, 2015, 28(11): 1728-1733.
Citation: WANG Yandi, L Shuguang, GU Xiaogang, QIU Zhaofu, SUI Qian, GUO Xuhong. The Degradation Performance of Trichloroethylene by Means of Fe(Ⅲ)-EDDS Activated Persulfate Process[J]. Research of Environmental Sciences, 2015, 28(11): 1728-1733.

EDDS螯合Fe(Ⅲ)活化过硫酸盐技术对TCE的降解效果

基金项目: 国家自然科学基金项目(41373094,51208199);中国博士后科学基金项目(2015M570341)

The Degradation Performance of Trichloroethylene by Means of Fe(Ⅲ)-EDDS Activated Persulfate Process

  • 摘要: 为解决传统Fe(Ⅱ)活化过硫酸盐过程中Fe有效性较低的问题,采用可生物降解的EDDS(乙二胺二琥珀酸)螯合Fe(Ⅲ)活化过硫酸盐处理水溶液中的TCE(三氯乙烯),考察c(过硫酸盐)、c〔Fe(Ⅲ)〕/c(EDDS)〔下称Fe(Ⅲ)/EDDS〕、溶液初始pH以及阴离子浓度对TCE降解效果的影响,并研究体系中产生的活性氧自由基. 结果表明:c(过硫酸盐)为15.0 mmol/L、Fe(Ⅲ)/EDDS为4时,60 min内TCE去除率达99.7%;提高c(过硫酸盐)、Fe(Ⅲ)/EDDS均有利于TCE降解,但超过一定限值后对TCE去除效果增强不明显;溶液初始pH(3~11)越高,TCE去除率越低;加入Cl-、HCO3-、SO42-和NO3- 4种阴离子均会抑制TCE降解,抑制程度表现为HCO3->Cl- >SO42->NO3-;自由基清扫试验证实体系中存在SO4-·、·OH和O2-·等3种活性氧自由基,·OH对TCE的降解起主导作用. 因此,EDDS螯合Fe(Ⅲ)活化过硫酸盐技术能够产生以·OH为主的活性氧自由基,从而快速高效去除水溶液中TCE,但降解过程受水质参数影响.

     

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出版历程
  • 收稿日期:  2015-05-13
  • 修回日期:  2015-07-24
  • 刊出日期:  2015-11-25

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