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Erschienen in: Journal of Material Cycles and Waste Management 1/2024

11.11.2023 | ORIGINAL ARTICLE

Effects of sewage sludge immobilized by composite phosphorus-bearing materials on speciations of heavy metals and growth of ryegrass

verfasst von: Tianyu Xie, Baihui Fang, Heng Cao, Yuhai He, Dongfang Wang, Xuan Zhang

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 1/2024

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Abstract

Sewage sludge treatment and disposal has become a pressing issue in China. Sewage sludge was passivated by composite phosphorus-bearing materials to decrease heavy metals bioavailability. The optimum immobilizing conditions that were 5 g of phosphate rock, 3 g of calcium superphosphate for 100 g sludge and 14 d of passivation time were determined by an orthogonal test. The physico-chemical properties and nutritional index of the passivated sludge complied with Chinese national standard GB/T23486-2009. In the pot experiment, 10% (wt) of passivated sludge (non-passivated sludge) was added into the background soil and labelled as passivated treatment (non-passivated treatment), respectively. Plant height, tiller count, chlorophyll content, and biomass all increased in the passivated treatment when compared to the control treatment, but they all dropped in the non-passivated treatment. Due to good passivation impact on Cu and Pb, their bioaccumulation factors did not significantly differ between the control and the passivated treatments, but were significantly greater in the non-passivated treatment. The bioaccumulation factors of Zn in the passivated and non-passivated treatments were much higher than those in the control treatment. These findings could provide a theoretical foundation for land usage of sewage sludge immobilized by composite phosphorus-bearing materials.

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Metadaten
Titel
Effects of sewage sludge immobilized by composite phosphorus-bearing materials on speciations of heavy metals and growth of ryegrass
verfasst von
Tianyu Xie
Baihui Fang
Heng Cao
Yuhai He
Dongfang Wang
Xuan Zhang
Publikationsdatum
11.11.2023
Verlag
Springer Japan
Erschienen in
Journal of Material Cycles and Waste Management / Ausgabe 1/2024
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-023-01843-0

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