高级搜索

维生素B12协同纳米Fe/Cu双金属对五氯酚的催化降解与机理

,  ,  ,  , 

downloadPDF

上一篇

下一篇

邢悦, 孙力平, 张婷婷, 邱春生, 王少坡. 维生素B12协同纳米Fe/Cu双金属对五氯酚的催化降解与机理[J]. 环境工程学报, 2017, 11(9): 4937-4943. doi: 10.12030/j.cjee.201701007
引用本文: 邢悦, 孙力平, 张婷婷, 邱春生, 王少坡. 维生素B12协同纳米Fe/Cu双金属对五氯酚的催化降解与机理[J]. 环境工程学报, 2017, 11(9): 4937-4943. doi: 10.12030/j.cjee.201701007
shu
XING Yue, SUN Liping, ZHANG Tingting, QIU Chunsheng, WANG Shaopo. Catalytic degradation and mechanism of pentachlorophenol by nano Fe/Cu bimetal and vitamin B12[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4937-4943. doi: 10.12030/j.cjee.201701007
Citation: XING Yue, SUN Liping, ZHANG Tingting, QIU Chunsheng, WANG Shaopo. Catalytic degradation and mechanism of pentachlorophenol by nano Fe/Cu bimetal and vitamin B12[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4937-4943. doi: 10.12030/j.cjee.201701007
shu

维生素B12协同纳米Fe/Cu双金属对五氯酚的催化降解与机理

  • 1.

    天津城建大学环境与市政工程学院, 天津 300384

  • 2.

    天津市水质科学与技术重点实验室, 天津 300384

  • 基金项目:

    国家自然科学基金资助项目（51478292）

  • 中图分类号: X703.1

Catalytic degradation and mechanism of pentachlorophenol by nano Fe/Cu bimetal and vitamin B12

  • 1.

    School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China

  • 2.

    Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China

  • Fund Project:

  • 摘要: 针对水中含氯有机物的脱氯降解，制备了Fe/Cu双金属纳米颗粒，并引入维生素B12，研究铜负载率和维生素B12的剂量对以五氯酚为典型污染物的脱氯效果。结果表明：维生素B12和纳米零价铜能够有效提升五氯酚的脱氯速率及脱氯程度，脱氯率从4.52%增加到78.55%，降解产物从四氯酚进一步降解为苯酚。实验发现增加铜负载率可使双金属比表面积增大，催化活性位增多；增加维生素B12浓度可促进体系电子传递，使体系还原反应活性提升。铜负载率和维生素B12浓度过大均会使体系反应速率减缓甚至抑制。实验优化铜负载率为10%（质量分数），维生素B12浓度为20 mg·L-1。探讨纳米零价铜和维生素B12的催化机理，以期对降解含氯有机物提供可操作性的参考。
    Abstract: Dechlorination of chlorinated organic catalyzed by Fe/Cu bimetallic nanoparticles was studied in this work. The Fe/Cu bimetallic nanoparticles were prepared and vitamin B12 was introduced in the preparation process of experiment. The effect of Cu loading rate and the dose of vitamin B12 on the dechlorination efficiency of pentachlorophenol (PCP) was investigated. The results showed that the degradation efficiency of PCP could be enhanced effectively by the addition of vitamin B12 and nano-zero-valent copper. The dechlorination rate of PCP increased from 4.52% to 78.55% with phenol as the final degradation product instead of tetrachlorphenoxide. The specific surface area and the catalytic activity of the bimetal catalyst increased with the increasing copper loading rate. The electron transfer of the catalytic system was promoted by the addition of vitamin B12 which also increased the reduction reaction efficiency. However, the catalytic activity of the nano Fe/Cu bimetal system could be slowed down or even inhibited by high copper loading rate and concentration of vitamin B12. It was found that optimal copper loading rate and concentration of vitamin B12were 10% (mass fraction) and 20 mg·L-1, respectively. The catalytic mechanism of the nano-zero-valent copper and vitamin B12 were also discussed in order to provide valuable references for the similar researches on degradation of chlorinated organic compounds.
  • 加载中
  • [1] 许文青,樊柏林,陈明,等.五氯苯酚和五氯苯酚钠毒性作用研究进展[J]. 中国药理学与毒理学杂志,2011,25(6):596-600
    [2] 陈建华,彭刚华,乔支卫,等, 固相萃取-超高效液相色谱法检测地表水中7种氯酚类化合物[J]. 中国环境监测,2015,31(3):144-149
    [3] 颜爱,卞琼,刘明华.改性纤维素负载零价铁去除三氯甲烷的研究[J].中国环境科学,2014,34(1):105-110
    [4] JOHNSON T L, SCHERER M M, TRATNYEK P G. Kinetics of halogenated organic compounds degradation by iron metal[J]. Environmental Science & Technology,1996,30(8):2634-2640
    [5] 张瑞华,孙红文.零价铁修复铬污染水体的实验室研究[J].农业环境科学学报,2004,23(6):1192-1195
    [6] CHEN S Y, CHEN W H, SHIHC J. Heavy metal removal from wastewater using zero-valent iron nanoparticles[J]. Water Science & Technology,2008,58(10):1947-1954
    [7] KASSAEE M Z, MOTAMEDI E, MIKHAK A, et al.Nitrate removal fromwater using iron nanoparticles produced by arc discharge vs.reduction[J]. Chemical Engineering Journal,2011,166(2):490-495
    [8] NAM S, TRATNYEK P G. Reduction of azo dyes with zero-valent iron[J]. Water Research,2000,34(6):1837-1845
    [9] 郝志伟,李亮,马鲁铭.零价铁还原法脱除地下水中硝酸盐的研究[J].中国给水排水,2008,24(17):36-39
    [10] 陈冰, 王晨, 王西奎.超声波-零价铁协同降解废水中活性深蓝M-2GE的研究[J]. 环境工程学报,2009,3(9):1589-1591
    [11] 徐新华, 卫建军, 汪大翚. Pd/Fe及纳米Pd/Fe对氯酚的脱氯研究[J]. 中国环境科学,2004,24(1):76-80
    [12] CHENG R, WANG J L, ZHANG W X, et al. Reductive dechlorination of 2,4-dichlorophenol using nanoscale Fe0:Influencing factors and possible mechanism[J]. Science in China Series B:Chemistry,2007,50(4):574-579
    [13] FENG J, LIM T T. Pathways and kinetics of carbon tetrachloride and chloroform reductions by nano-scale Fe and Fe/Ni particles:Comparison with commercial micro-scale Fe and Zn[J]. Chemosphere,2005,59(9):1267-1277
    [14] WANG X Y, CHEN C, CHANG Y, et al. Dechlorination of chlorinated methanes by Pd/Fe bimetallic nanoparticles[J]. Journal of Hazardous Materials,2009,161(2/3):815-823
    [15] 陶宏林,单爱琴,李海花,等.Cu/Fe双金属去除四氯化碳的研究[J].安徽农业科学,2011,39(1):10377-10379
    [16] 王陆涛.纳米Cu/Fe对三氯乙烯的催化脱氯研究[D].北京:北京化工大学,2013
    [17] YANG M X, SARKAR S, BENT B E, et al. Degradation of multiply-chlorinated hydrocarbons on Cu(100)[J]. Langmuir,1997, 13(2):229-242
    [18] ASSAF-ANID N, HAYES K F, VOGEL T M. Reductive dechlorination of carbon tetrachloride by cobalamin(Ⅱ) in the presence of dithiothreitol:Mechanistic study, effect of redox potential and pH[J]. Environmental Science & Technology,1994,28(2):246-252
    [19] HUANG C C, LO S L, LIEN H L. Vitamin B12-mediated hydrodechlorination of dichloromethane by bimetallic Cu/Al particles[J]. Chemical Engineering Journal,2015,273:413-420
    [20] BRANSFIELD S J, CWIERTNY D M, ROBERTS A L, et al. Influence of Cu loading and surface coverage on the reactivity of granular iron toward 1,1,1-trichloroethane[J]. Environmental Science and Technology, 2006,40(5):1485-1490
    [21] 王向宇. 纳米钯/铁双金属体系对氯代有机物催化还原脱氯研究[D]. 哈尔滨:哈尔滨工业大学,2009
    [22] 谢凝子,邱罡,陈少瑾.钯铁双金属体系还原脱氯水中二氯苯同分异构体[J].农业环境科学学报,2008,27(2):758-761
    [23] 吴德礼, 马鲁铭.催化还原技术处理水溶液中氯代有机物的实验研究[J]. 工业水处理,2005, 25(1):21-24
    [24] 张珍. 纳米级双金属体系对水中氯苯和多氯联苯的催化还原脱氯研究[D].杭州:浙江大学,2013
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  2302
  • HTML全文浏览数:  1825
  • PDF下载数:  595
  • 施引文献:  0
出版历程
  • 收稿日期:  2017-03-20
  • 刊出日期:  2017-08-26

维生素B12协同纳米Fe/Cu双金属对五氯酚的催化降解与机理

  • 1.  天津城建大学环境与市政工程学院, 天津 300384
  • 2.  天津市水质科学与技术重点实验室, 天津 300384
  • 收稿日期:  2017-03-20
基金项目:

国家自然科学基金资助项目（51478292）

摘要: 针对水中含氯有机物的脱氯降解，制备了Fe/Cu双金属纳米颗粒，并引入维生素B12，研究铜负载率和维生素B12的剂量对以五氯酚为典型污染物的脱氯效果。结果表明：维生素B12和纳米零价铜能够有效提升五氯酚的脱氯速率及脱氯程度，脱氯率从4.52%增加到78.55%，降解产物从四氯酚进一步降解为苯酚。实验发现增加铜负载率可使双金属比表面积增大，催化活性位增多；增加维生素B12浓度可促进体系电子传递，使体系还原反应活性提升。铜负载率和维生素B12浓度过大均会使体系反应速率减缓甚至抑制。实验优化铜负载率为10%（质量分数），维生素B12浓度为20 mg·L-1。探讨纳米零价铜和维生素B12的催化机理，以期对降解含氯有机物提供可操作性的参考。

English Abstract

    全文HTML

参考文献 (24)

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心