Experimental research on chelator for treatment of sediment contaminated by heavy metals
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Experimental research on chelator for treatment of sediment contaminated by heavy metals
CIESC JournalIssue 1, Pages: 231-236(2011)
作者机构:
1. 1河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏,南京,210098
2. 河海大学环境科学与工程学院,江苏,南京,210098
作者简介:
基金信息:
DOI:
CLC:
Online First:05 January 2011,
Published:05 January 2011
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FANG Shengrong, XU Ying, LU Jingling, et al. Experimental research on chelator for treatment of sediment contaminated by heavy metals[J]. CIESC Journal, 2011, (1): 231-236.
DOI:
FANG Shengrong, XU Ying, LU Jingling, et al. Experimental research on chelator for treatment of sediment contaminated by heavy metals[J]. CIESC Journal, 2011, (1): 231-236.DOI:
Experimental research on chelator for treatment of sediment contaminated by heavy metals
A new type of heavy metal chelating agent,potassium diisopropyl dithiophosphate was synthesized and the treatment of sediment contaminated by heavy metals by this chelator was investigated.The results indicated that when the dosage of potassium diisopropyl dithiophosphate was 3%(mass)
the stabilization rate of heavy metals in sediment
such as Pb
Cu
Cd
could reach more than 85%
and the effect was better than inorganic stabilization chemicals
like Na2S and Na3PO4. After treatment the sediment could meet the US standards for heavy metals waste landfill.Meanwhile
the maximum leaching capacity of the treated sediment was much lower than the case with inorganic stabilization chemicals
and such stabilization effect could be obtained in a wide range of pH. The heavy metals in sediment after treatment could be transformed from exchangeable to organically bound and residue
reducing secondary contamination risk when the environment has changed.