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1,1,1-三氯乙烷和1,4-二噁恶烷复合污染地下水的超声协同降解研究 被引量:2

Degradation of 1,1,1-Trichloroethane and 1,4-Dioxane Co-existed in Groundwater by Ultrasonics-Oxidant Systems
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摘要 以某场地1,1,1-三氯乙烷(TCA)和1,4-二口恶烷(1,4-D)复合污染地下水为研究对象,探讨了超声(US)与氧化剂[S2O2-8(PS)和H2O2]协同降解目标污染物的效能、影响因素和急性毒性抑制效应。结果表明,室温25℃、初始p H8.2、氧化剂/1,4-D摩尔比200∶1、超声频率400 k Hz、强度2.67 W·cm-2、功率100 W时,复合污染地下水经4种体系处理4 h,其中"US+PS+H2O2"耦合体系的降解效果最佳,TCA可完全去除,1,4-D去除率为33%。基于两种污染物的去除效果,PS、H2O2投量和反应温度对耦合体系污染物去除影响较大,较佳氧化剂投量为:PS、H2O2与1,4-D摩尔比分别为1000∶1和200∶1。按该投量且控温时TCA和1,4-D分别经6 h和10 h后完全去除,其急性毒性抑制效应分别降低98.81%和99.87%;非恒温时温度逐渐增至60℃,目标污染物去除速度明显加快,相比恒温时耗时分别缩短1 h和3 h。试验证明,超声协同降解工艺是一种有应用前景的修复TCA和1,4-D复合污染地下水的有效方法。 In China there is little information available about the degradation of 1,1,1-trichloroethane(TCA)and 1,4-dioxane(1,4-D)in groundwater. Here the efficiencies, influencing factors and acute toxicity effects of TCS and 1,4-D degradation in ultrasonics(US)and/or oxidants[persulfate(PS)and H2O2] systems were examined. Results showed that the'US+PS+H2O2'system exhibited the best treatment performance, in which 100% of TCA and 33% of 1,4-D were degraded within 4 h at 25 ℃, initial p H of 8.2, oxidant/1,4-D molar ratio of 200∶1,ultrasonic frequency of 400 k Hz, ultrasonic intensity of 2.67 W·cm-2and power of 100 W. Oxidants(PS and H2O2)and reaction temperature had important impacts on the removal of TCA and 1,4-D. The optimum oxidant doses were:H2O2/1,4-D=200∶1, and PS/1,4-D=1000∶1. At a constant temperature of 25 ℃, TCA and 1,4-D were completely removed after 6 h and 10 h, and the acute toxicities of treated groundwater were decreased by 98.81% and 99.87%, respectively. Rising temperature gradually to 60 ℃ enhanced the degradation rates of target pollutants, and shortened degradation time by 1 h and 3 h, respectively. These results show that ultrasonics plus oxidants is a promising method for remediating concurrently contaminated groundwater with TCA and 1,4-D.
作者 李炳智 朱江
出处 《农业环境科学学报》 CAS CSCD 北大核心 2015年第11期2183-2189,共7页 Journal of Agro-Environment Science
基金 国家自然科学基金(41303095) 上海市自然科学基金(13ZR1435200 12ZR1426500) 上海市人才发展资金(201320) 上海市环保局重大科研项目(沪环科2014-07) 上海市环保局青年基金(H214305) 上海市环科院青创基金(CX201304)
关键词 1 1 1-三氯乙烷 1 4-二口恶烷 地下水污染 超声 协同降解 1,1,1-trichloroethane 1,4-dioxane groundwater contamination ultrasonics joint degradation
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参考文献20

  • 1Yuefei Ji,Corinne Ferronato,Arnaud Salvador,Xi Yang,Jean-Marc Chovelon.Degradation of ciprofloxacin and sulfamethoxazole by ferrous-activated persulfate: Implications for remediation of groundwater contaminated by antibiotics[J]. Science of the Total Environment . 2014
  • 2Jina Shin,Young-Chul Lee,Yeonghee Ahn,Ji-Won Yang.1,4-Dioxane degradation by oxidation and sonication in the presence of different-sized ZVI in open-air system[J]. Desalination and Water Treatment . 2012 (1-3)
  • 3Wen-Shing Chen,Yi-Chang Su.Removal of dinitrotoluenes in wastewater by sono-activated persulfate[J]. Ultrasonics - Sonochemistry . 2011 (4)
  • 4Bingzhi Li,Lin Li,Kuangfei Lin,Wei Zhang,Shuguang Lu,Qishi Luo.Removal of 1,1,1-trichloroethane from aqueous solution by a sono-activated persulfate process[J]. Ultrasonics - Sonochemistry . 2012
  • 5Soon Chul Kwon,Joo Yeon Kim,Sung Min Yoon,Wisup Bae,Kyung Seok Kang,Young Woo Rhee.Treatment characteristic of 1,4-dioxane by ozone-based advanced oxidation processes[J]. Journal of Industrial and Engineering Chemistry . 2012 (6)
  • 6Shaily Mahendra,Ariel Grostern,Lisa Alvarez-Cohen.The impact of chlorinated solvent co-contaminants on the biodegradation kinetics of 1,4-dioxane[J]. Chemosphere . 2012
  • 7Richard H Anderson,Janet K Anderson,Paul A Bower.Co‐occurrence of 1,4‐dioxane with trichloroethylene in chlorinated solvent groundwater plumes at US Air Force installations: Fact or fiction[J]. Integr Environ Assess Manag . 2012 (4)
  • 8Ya-Ting Lin,Chenju Liang,Jiun-Hua Chen.Feasibility study of ultraviolet activated persulfate oxidation of phenol[J]. Chemosphere . 2010 (8)
  • 9Jingchun Yan,Min Lei,Lihua Zhu,M. Naveed Anjum,Jing Zou,Heqing Tang.Degradation of sulfamonomethoxine with Fe 3 O 4 magnetic nanoparticles as heterogeneous activator of persulfate[J]. Journal of Hazardous Materials . 2010 (2)
  • 10Naresh N. Mahamuni,Yusuf G. Adewuyi.Advanced oxidation processes (AOPs) involving ultrasound for waste water treatment: A review with emphasis on cost estimation[J]. Ultrasonics - Sonochemistry . 2009 (6)

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