沉积物中腐殖质对铜毒性的影响  

EFFECT OF HUMUS ON TOXICITY OF COPPER IN SEDIMENT

作　　者：朱江[1] 侯海瑛[2] 葛虹[2] 李威[2] 刘敏[1] 

机构地区：[1]中国地质大学工程学院,武汉,430074 [2]湖北省水产科学研究所,武汉,430071

出　　处：《应用与环境生物学报》2003年第6期631-634,共4页Chinese Journal of Applied and Environmental Biology

摘　　要：东湖沉积物中掺入腐殖质与铜 ,得到总有机碳 (TOC) 1.4 5 %～ 5 .72 %、总铜 (TCu) 12 0～ 2 70 0mg/kg的污染沉积物样品 ,离心法制取沉积物间隙水 .间隙水对大型溞 (Daphniamagna)进行 4 8h急性毒性试验 .沉积物及间隙水的化学分析表明 :间隙水中可溶性有机碳 (DOC)、铜 (Cu)、铁 (Fe)、锰 (Mn)、钙 (Ca)与沉积物中TOC和TCu含量关系呈现不同的变化规律 .多元分析表明 :间隙水中铜对大型溞的急性毒性 ,随沉积物中TOC含量的升高而减弱 ,随沉积物中总铜含量的增加而增强 ,多元回归方程为 :LC50 =- 0 .13179+0 .0 780 7[TOC]- 0 .0 0 0 12 [TCu]+0 .0 4 6 5 3[DOC]- 0 .0 80 4 5 [Cu]+0 .0 0 794 [Fe]+0 .0 36 6 [Ca],P =0 .0 0 0 0 <P0 .0 1.表 2参Freshwater sediment from the East Lake in Wuhan,was spiked with humus and copper to obtain sediment samples with different levels of total organic carbon(TOC,1.47%～5.72%) and total copper (TCu,120 mg/kg～2,700 mg/kg dry weight).Interstitial water (IW) was collected through centrifugation and the IW was tested for 48 hours on its acute toxicity to Daphnia manga . The chemical analysis of sediment and IW showed that the contents of dissolved organic carbon (DOC),Cu,Fe,Mn,Ca concentrations were different with the changes of TOC and TCu concentrations in sediment. Multiple regression model was: LC 50 =-0.13179 +0.07807-0.00012+0.04653-0.08045+0.00794+ 0.0366 ,P = 0.0000 < P 0.01 . Tab 2,Ref 19

关 键 词：腐殖质 沉积物 铜 急性毒性 大型Sou 

分 类 号：X171.5[环境科学与工程—环境科学]