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介质阻挡放电等离子体去除水中敌草隆的降解机理

朱 丹 陈 培 江 林 刘润龙 郎 林 袁守军 冯景伟

朱 丹, 陈 培, 江 林, 刘润龙, 郎 林, 袁守军, 冯景伟. 介质阻挡放电等离子体去除水中敌草隆的降解机理[J]. 环境科学研究, 2014, 27(11): 1360-1366.
引用本文: 朱 丹, 陈 培, 江 林, 刘润龙, 郎 林, 袁守军, 冯景伟. 介质阻挡放电等离子体去除水中敌草隆的降解机理[J]. 环境科学研究, 2014, 27(11): 1360-1366.
ZHU Dan, CHEN Pei, JIANG Lin, LIU Run-long, LANG Lin, YUAN Shou-jun, FENG Jing-wei. Removal Mechanism of Aqueous Diuron by Dielectric Barrier Discharge Plasma[J]. Research of Environmental Sciences, 2014, 27(11): 1360-1366.
Citation: ZHU Dan, CHEN Pei, JIANG Lin, LIU Run-long, LANG Lin, YUAN Shou-jun, FENG Jing-wei. Removal Mechanism of Aqueous Diuron by Dielectric Barrier Discharge Plasma[J]. Research of Environmental Sciences, 2014, 27(11): 1360-1366.

介质阻挡放电等离子体去除水中敌草隆的降解机理

基金项目: 国家自然科学基金项目(51208163,9);河海大学水文水资源与水利工程科学国家重点实验室开放课题(2013491211);南京大学污染控制与资源化研究国家重点实验室开放课题项目(PCRRF11014)

Removal Mechanism of Aqueous Diuron by Dielectric Barrier Discharge Plasma

  • 摘要: 研究了线筒式介质阻挡放电等离子体对水中敌草隆的降解效果,考察了不同因素对敌草隆去除效果的影响及其对敌草隆的降解机理. 结果表明:输入功率、空气流量均对敌草隆的降解产生较大影响. 输入功率为50 W、空气流量为140 L/h时,放电反应6 min敌草隆的去除率达到95.7%. 随着放电时间的增加,水溶液中测出的ρ(O3)、ρ(H2O2)均明显升高,6 min后其产量分别为11.9和1.2 mg/L;放电6 min后pH从最初的6.3降至3.4,ρ(TOC)也从最初的14.2 mg/L降至11.9 mg/L. 采用离子色谱仪分析敌草隆降解过程中产生的离子发现,反应过程中ρ(Cl-)和ρ(NO3-)呈线性增长. 采用发光细菌抑制率反映溶液毒性,放电6 min后,敌草隆溶液对发光细菌的抑制率高达90.5%,溶液毒性增大. 通过液相色谱-飞行时间质谱对敌草隆降解产物进行分析,敌草隆降解过程中中间产物的形成存在烷基氧化、脱氯羟化、脱氯羟化-烷基氧化3种途径.

     

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出版历程
  • 收稿日期:  2013-12-04
  • 修回日期:  2014-04-25
  • 刊出日期:  2014-11-25

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