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MnO2表面结合Fe(Ⅱ)对三氯乙烯的还原脱氯作用

Keywords: 三氯乙烯,还原脱氯,Fe(Ⅱ),MnO2

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Abstract:

通过批量实验研究了Fe(Ⅱ)、MnO2和MnO2表面吸附Fe(Ⅱ)这3种体系对溶液中三氯乙烯的还原脱氯作用。发现Fe(Ⅱ)吸附在MnO2表面时,对三氯乙烯的脱氯作用最强,氯代降解产物为顺-二氯乙烯(cis-DCE),且反应符合准一级动力学。进一步实验表明,保持Fe(Ⅱ)浓度为1mmol/L,反应速率常数kobs和三氯乙烯去除率随pH升高(5.0~9.0)而增加,最大值分别为1.62×10-1h-1、70.4%;固定pH=7.0,kobs和三氯乙烯去除率随其Fe(Ⅱ)浓度增加(1~3mmol/L)而增大。Fe(Ⅱ)浓度继续增加,kobs和三氯乙烯去除率反而减小。pH=7.0,Fe(Ⅱ)浓度为3mmol/L时,kobs和三氯乙烯去除率达到最大值,分别为2.86×10-1h-1和85.7%。

References

[1]  张惠敏. 三氯乙烯生产及应用现状. 中国氯碱,2004, (8): 17-19 Zhang Huimin. Production and application status of trichloroethylene. China Chlor-Alkali, 2004, (8): 17-19(in Chinese)
[2]  崔俊芳, 郑西来, 林国庆. 地下水有机污染处理的渗透性反应墙技术. 水科学进展,2003, 14(3): 363-367 Cui Junfang, Zheng Xilai, Lin Guoqing. Permeable reactive wall for remediation of organic-contaminated groundwater. Advances in Water Science, 2003, 14(3): 363-367(in Chinese)
[3]  Jeong H. Y., Anatharaman K., Han Y. S., et al. Abiotic reductive dechlorination of cis-dichloroethylen by Fe species formed during iron-or sulfate-reduction. Environ. Sci. Technol.,2011, 45(12): 5186-5194
[4]  Liang X. M., Butler E. C. Effects of natural organic matter model compounds on the transformation of carbon tetrachloride by chloride green rust. Water Research,2010, 44(7): 2125-2132
[5]  Hwang I., Park H. J., Kang W. H., et al. Reactivity of Fe(Ⅱ)/cement systems in dechlorinating chlorinated ethylenes. Journal of Hazardous Materials,2005, B118(1-3): 103-111
[6]  Kenneke J. F., Weber E. J. Reductive dehalogenation of halomethanes in iron-and sulfate-reducing sediments. 1.reactivity pattern analysis. Environ. Sci. Technol.,2003, 37(4): 713-720
[7]  Liu C. C., Tseng D. H., Wang C. Y. Effect of ferrous ions on the reductive dechlorination of trichloroethylene by zero-valent iron. Journal of Hazardous Materials,2006, B131(3): 706-713
[8]  Liang X. M., Philp R. P., Butler E. C. Kinetic and isotope analyses of tetrachloroethylene and trichloroethylene degradation by model Fe(Ⅱ)-bearing minerals.Chemosphere,2009, 75(1): 63-69
[9]  Maithreepala R. A., Doong R. A. Reductive dechlorination of carbon tetrachloride in aqueous solutions containding ferrous and copper ions. Environ. Sci. Technol.,2004, 38(24): 6676-6684
[10]  Lee W., Batchelor B. Abiotic reductive dechlorination of chlorinated ethylenes by iron-bearing soil minerals. 2.Green rust. Environ. Sci. Technol.,2002, 36(24): 5348-5354
[11]  Ramona D., Leo L., Richard G. Biotic and abiotic anaerobic transformations of trichloroethene and cis-1-2-dichloroethene in fractured sandston. Environ. Sci. Technol.,2008, 42(10): 4323-4330
[12]  田秀君. 分光光度法测定水中微量的氯离子. 仪器仪表与分析监测,2004, (2): 32-33 Tian Xiujun. The determination of chlorine ion in water by Spectrophotometry. Instrumentation Analysis Monitoring, 2004, (2): 32-33(in Chinese)
[13]  何代平, 胡敬, 蔡铎昌. 无定形MnO2的制备及其催化苯甲醇选择氧化性能. 云南大学学报,2007, 15(5): 40-43 He Daiping, Hujing, Cai Duochang.Fabrication and pseudocapacitance performance of Nano-MnO2 electrode material. Journal of Yunnan University,2007, 15(5): 40-43(in Chinese)
[14]  O’Loughlin E. J., Burris D. R., Delcomyn C. A. Reductive dechlorination of trichloroethene mediated by humic-metal complexes. Environ. Sci. Technol.,1999, 33(7): 1145-1147
[15]  Minakshi M., Mitchell D. R. G. The influence of bismuth oxide doping on the rechargeability of aqueous cells using MnO2 cathode and LiOH electrolyte. Electrochimica Acta,2008, 53(22):6323-6327
[16]  Choi B., Lee S., Fushimi C., et al. Fibrous MnO2 electrodeposited on carbon fiber for a fuel cell/battery system. Electrochimica Acta,2011, 56(19): 6696-6701
[17]  Pecher K., Haderlein S. B., Kennedy D. W., et al. Reduction of polyhalogenated methanes by surface-bound Fe(Ⅱ) in aqueous suspensions of iron oxides. Environ. Sci. Technol.,2002, 36(8): 1734-1741
[18]  顾晓清, 马小东, 孙红文. 氧化锌表面的Fe(Ⅱ)对三氯乙烯的还原脱氯研究. 生态环境,2007, 16(4): 1180-1183 Gu Xiaoqing, Ma Xiaodong, Sun Hongwen. Reductive dechlorination of trichloroethylene by surface-bound Fe(Ⅱ) associated with zinc oxide. Ecology and Environment, 2007, 16(4): 1180-1183(in Chinese)
[19]  Maithreepala R. A., Doong R. A. Synergistic effect of copper ion on the reductive dechlorination of carbon tetrachloride by surface-bound Fe(Ⅱ) associated with goethite. Environ. Sci. Technol.,2004, 38(1): 260-268
[20]  Elsner M., Schwarzenbach R. P., Haderlein S. B. Reductivity of Fe(Ⅱ)-bearing minerals toward reductive transformation of organic contaminants. Environ. Sci. Technol.,2004, 38(3): 799-807

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