文献类型：期刊文献

中文题名：2,4-二氯酚对杞柳的毒性及在其体内的吸收与降解

英文题名：Phytotoxicity, uptake and degradation of 2,4-dichlorophenol in Salix integra

作者：施翔[1,2] 陈益泰[1] 饶龙兵[1] 段红平[2]

第一作者：施翔

机构：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400;[2]云南农业大学资源与环境学院,云南昆明650201

年份：2008

卷号：28

期号：10

起止页码：921-926

中文期刊名：中国环境科学

外文期刊名：China Environmental Science

收录：CSTPCD;;EI(收录号：20084611702785);Scopus(收录号：2-s2.0-55649095796);北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：浙江省科技厅重大科研项目(2006C12065);浙江省、中国林业科学研究院合作项目(2006SY10)

语种：中文

中文关键词：2,4-二氯苯酚;杞柳;毒理;吸收;降解

外文关键词：2,4-dichlorophenol; Salixintegra： phytotoxicity; uptake; degradation

分类号：X173;X171.4

摘要：在含有2,4-二氯苯酚（2，4-DCP）人工配置的营养液中培养杞柳（Salix integra），研究了2,4-DCP对杞柳的急性毒理效应以及在杞柳体内的吸收降解规律．结果表明，杞柳暴露在10—100mg／L2,4-DCP下，生长明显受到抑制．2，4-DCP主要累积在杞柳根系中，在前48h，2,4-DCP在根系和地上部中的含量急剧上升；96h内，2,4-DCP在杞柳根系和地上部中的浓度分别为265．14，12．51mg／kg，根浓缩系数（RCF）达到了70．18．在无污染的营养液中培养，杞柳根系和地上部中的2,4-DCP在7d内下降到50．74，2．66mg／kg，且降解过程符合一级动力学方程，降解速率常数分别为O．0141，0．0066h^-1．同时，根系组织中多酚氧化酶（PPO）和过氧化物酶（POD）活性受到2,4-DCP的明显抑制．在低浓度污染水环境下，杞柳是修复2,4-DCP的较好植物．
Phytoremediation of 2,4-dichlorophenol （2,4-DCP） in water solutions by Salix integra was investigated. The toxicity, uptake and degradation of 2,4-DCP in Salix integra were studied with willows cultured in Hoagland solution containing 10 to 100mg/L 2,4-DCP. The transpiration of the trees was used to determine toxic effects. Severe inhibition of transpiration started approximately at 2,4-DCP concentrations of 20mg/L. The root was primary site of 2,4-DCP accumulation. Concentration of 2,4-DCP in roots and shoots were 265.14 and 12.51mg/kg in 96h, respectively. The root concentration factor （RCF） was 70.18. Then willows were cultured in non-pollutant solution, 2,4-DCP in cultures decreased to 50.74, 2.66mg/kg respectively. The kinetics of 2,4-DCP degradation by Salix integra fitted the first-order kinetics equation, with the k constant being 0.0141 and 0.0066h^-1, respectively. Although the activities of polyphenoloxidase and peroxidase in the roots of Salix integra were restrained significantly by 2,4-DCP, phytoremediation of 2,4-DCP（concentrations ≤ 20mg/L） by Salix integra was considered an efficient treatment to 2,4-DCP polluted water.