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Cited by 489

The DOI matches its Crossref record; 12 of the 12 references it cites were found in a registry or an index.

Sewage Sludge Biochar Influence upon Rice (Oryza sativa L) Yield, Metal Bioaccumulation and Greenhouse Gas Emissions from Acidic Paddy Soil

Khan, Sardar, Chao, Cai, Waqas, Muhammad, Arp, Hans Peter H., Zhu, Yong-Guan·2013·Environmental Science & Technology

Abstract

Biochar addition to soil has been proposed to improve plant growth by increasing soil fertility, minimizing bioaccumulation of toxic metal(liod)s and mitigating climate change. Sewage sludge (SS) is an attractive, though potentially problematic, feedstock of biochar. It is attractive because of its large abundance; however, it contains elevated concentrations of metal(loid)s and other contaminants. The pyrolysis of SS to biochar (SSBC) may be a way to reduce the availability of these contaminants to the soil and plants. Using rice plant pot experiments, we investigated the influence of SSBC upon biomass yield, bioaccumulation of nutrients, and metal(loid)s, and green housegas (GHG) emissions. SSBC amendments increased soil pH, total nitrogen, soil organic carbon and available nutrients and decreased bioavailable As, Cr, Co, Ni, and Pb (but not Cd, Cu, and Zn). Regarding rice plant properties, SSBC amendments significantly (P ≤ 0.01) increased shoot biomass (71.3-92.2%), grain yield (148.8-175.1%), and the bioaccumulation of phosphorus and sodium, though decreased the bioaccumulation of nitrogen (except in grain) and potassium. Amendments of SSBC significantly (P ≤ 0.05) reduced the bioaccumulation of As, Cr, Co, Cu, Ni, and Pb, but increased that of Cd and Zn, though not above limits set by Chinese regulations. Finally regarding GHG emissions, SSBC significantly (P < 0.01) reduced N2O emissions and stimulated the uptake/oxidation of CH4 enough to make both the cultivated and uncultivated paddy soil a CH4 sink. SSBC can be beneficial in rice paddy soil but the actual associated benefits will depend on site-specific conditions and source of SS; long-term effects remain a further unknown.

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Metadata

Authors
Khan, S., Chao, C., Waqas, M., Arp, H. P. H., & Zhu, Y.-G.
Venue
Environmental Science & Technology
Published
2013-08-06
Volume
47
Issue
15
Pages
8624-8632
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2047082387
Cited by
489
References
12
FWCI
33.96
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Sewage Sludge Biochar Influence upon Rice (Oryza sativa L) Yield, Metal Bioaccumulation and Greenhouse Gas Emissions from Acidic Paddy Soil. https://app.cochat.ai/papers/10.1021/es400554x
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Khan, S., Chao, C., Waqas, M., Arp, H. P. H., & Zhu, Y.-G. (2013). Sewage Sludge Biochar Influence upon Rice (Oryza sativa L) Yield, Metal Bioaccumulation and Greenhouse Gas Emissions from Acidic Paddy Soil. Environmental Science & Technology. https://doi.org/10.1021/es400554x

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