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- W2375492575 abstract "The content of bioavailable heavy metals in different amendments of sewage sludge mixed with soil was determined.The index of geoaccumulation(Igeo),potential ecological risk(RI),synthesis toxicity index model(STI) and accumulation of heavy metals in the mixed soil-plant(ryegrass) system were used to evaluate the potential ecological risk of heavy metals in sludge intended for agriculture use.The results showed that the bioavailability of Cd,Cu and Zn increased with the increasing sewage sludge addition,but the bioavailability of Pb decreased significantly.Assessed by the results of evaluation methods,Pb in soil amended with sewage sludge possessed no contamination and low potential ecological risk;Cu and Zn possessed middle contamination and low potential ecological risk;Cd appeared severe contamination and high level risk.In general,soil with different sewage sludge amendment possessed high level of ecological risk.As the ratio of sewage sludge was greater than 6∶10,the toxic and comprehensive pollution index of heavy metals were higher than control soil.Concentrations of Cd,Pb,Cu and Zn in ryegrass had a significant and positive correlations with the contents of bioavailable metal forms in soil amended with sewage sludge.The potential ecological risk of Cd,Cu and Zn in soil amended with sewage sludge was found to correspond with their accumulation ability in ryegrass." @default.
- W2375492575 created "2016-06-24" @default.
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- W2375492575 date "2013-01-01" @default.
- W2375492575 modified "2023-09-23" @default.
- W2375492575 title "Bioavailability and Potential Ecological Risk of Heavy Metals in Sludge and in Soil Amended with Sewage Sludge" @default.
- W2375492575 hasPublicationYear "2013" @default.
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