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[1]HUANG Diannan,LI Lin,FU Jinxiang,et al.Migration and Transformation of Heavy Metals and Nutrient Elements in Sandy Soil Ameliorated with Sludge[J].Research of Soil and Water Conservation,2019,26(02):359-365.

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Migration and Transformation of Heavy Metals and Nutrient Elements in Sandy Soil Ameliorated with Sludge

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 359-365 Column: Public date: 2019-04-28

Title:: Migration and Transformation of Heavy Metals and Nutrient Elements in Sandy Soil Ameliorated with Sludge

Author(s):: HUANG Diannan, LI Lin, FU Jinxiang, TAN Jie, ZHANG Hekai, CHANG Sha, JIAO Meiyi; Liaohe River Basin Water Pollution Control Institute, Shenyang Jianzhu University, Shenyang 110168, China

Keywords:: sludge; sandy soil; heavy metals; nutrients

CLC:: X53

DOI:: -

Abstract:: To explore the influence of sewage plant dewatered sludge on the migration and transformation of heavy metals and nutrients in modified sandy soil, 15% of sludge was used to modify sand as 0—20 cm soil layer. Analysis of the content and morphological transformation of heavy metals and nutrients in soil layers was performed by using saturated leaching, revealing the migration and transformation of heavy metals and nutrients in soil layers. The results showed that, from the point of heavy metal content, experimental leaching after 10 times, the retention rates of Cu, Pb, Zn, Cr were 78.57%, 78.72%, 86.35%,76.61%, retention rate was higher, the retention rate of Ni was 40.37%, retention rate was lower in the surface soil layer. However, with the increase of leaching times, there was a certain risk of heavy metals leaching or transferring to deep soil layer. The activity coefficients of Ni, Zn, Cr, Cu, Pb were 1.657, 0.531, 0.265, 0.113, 0, respectively, so it was found that the properties of Ni and Zn were unstable, the properties of Cr and Cu were stable, and Pb was the most stable. The contents of nitrogen and phosphorus nutrients in modified sandy soil decreased after leaching, the loss rate of nitrogen was 39.36%, and the loss rate of phosphorus was 18.67%. Nitrogen was more likely to be lost than phosphorus, the increase of nitrogen was higher than phosphorus in the deep layer.

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