Effects of Three Cheating Agents on Rehabilitation of Cd-contaminated Soil with Sunflower
CHEN Li
WANG Dan
LONG Chan
JIANG Wenjing
Abstract：This paper focuses on the effects of chelating agents on absorption,accumulation and transport characteristics of sunflower growing in Cd contaminated soil.To study the effects,a pot experiment was conducted which involved to the soil the addition of 15 mg/kg of Cd,at the same time,2.5 mmol/kg of EDDS,5.0 mmol/kg of OA and 7.5 mmol/kg of CA;then the effects on sunflower growth,the Cd absorption and the activation property of Cd in the soil were investigated.The study found that application of 2.5 mmol/kg of OA and 2.5 mmol/kg of CA to the Cd contaminated soils slightly promoted an increase of biomass of sunflowers;while other chelating agents resulted in decreases in certain degrees.Besides,it was found that application of 5 mmol/kg EDDS resulted in the maximum values of Cd in roots,shoots and single plant,the transfer coefficient could be expected to reach 1.075,1.99 times of the control group;the greatest activated Cd in the soil could be of 10.96 mg/kg,which was 1.42 times of that of the control group.Therefore,properly addition of the chelating agent was effectively conducive to Cd mobilization in soil,and promoted the uptake of Cd by sunflowers and transfer of Cd from the roots to shoots.
Keywords：chelating agentCdsunfloweraccumulating characteristic
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 22-29 )