Effects of iron-modified biochar with S-rich and Si-rich feedstocks on Cd immobilization in the soil-rice system.
Ecotoxicol Environ Saf. 2021 Dec 01; 225:112764.EE

Abstract

Fe-modified biochar has been shown to have high sorption ability for cadmium (Cd), while Cd immobilization effects of Fe-modified biochars with Si-rich and S-rich feedstocks have been rarely addressed. To explore the effects of Fe-modified Si-rich and S-rich biochars on Cd translocation in the soil-rice system, a pot experiment was carried out with an acidic Cd-contaminated sandy loam paddy from central South China and a late season rice cultivate during July to November 2018. Rice straw and rice husk were chosen as Si-rich feedstocks, and rape straw was applied as S-rich feedstock, these feedstocks were further collected and pyrolyzed at 450 °C. Pristine and Fe-impregnated rice straw (BRS/BRS-Fe), rice husk (BRH/BRH-Fe) and rape straw (BRE/BRE-Fe) biochars were applied at 0 and 10 t/ha, respectively. The reductions in Cd concentrations in rice grains were 23.8%, 22.3% and 46.1% with treatments of BRE, BRS and BRH, respectively, compared to the control. Compared to other pristine biochars, BRH is more effective in Cd remediation in paddy soil. For Fe-modified biochars, BRE-Fe achieved the highest reductions in Cd concentrations in rice grains with 46.7% and 30.1%, compared with the control and BRE, respectively. BRE-Fe decreased Cd remobilization from leaves to grains. Only BRE-Fe enhanced the formation and Cd sorption capacity of iron plaque. BRS-Fe and BRH-Fe enhanced Fe content in rice plants, which might induce the reduction in iron plaque formation. Fe and S-contained complexes contents increased in the contaminated pristine biochar particles, but reduced in the contaminated BRE-Fe particles. Therefore, Fe modification could not enhance Cd immobilization effect of Si-rich biochar, while Fe modified S-rich biochar has promising potential for Cd remediation with enhancement in iron plaque formation and Cd fixation in rice leaves.

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Authors+Show Affiliations

Sui F

Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China; School of Environmental Science and Engineering, Yancheng Institute of Technology, No. 211 Jianjun East Road, Yancheng 224051, China.

Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.

Munroe P

School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.

Li L

Pan G

MeSH

CadmiumCharcoalIronOryzaSoil

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34544024

Citation

Sui, Fengfeng, et al. "Effects of Iron-modified Biochar With S-rich and Si-rich Feedstocks On Cd Immobilization in the Soil-rice System." Ecotoxicology and Environmental Safety, vol. 225, 2021, p. 112764.

Sui F, Kang Y, Wu H, et al. Effects of iron-modified biochar with S-rich and Si-rich feedstocks on Cd immobilization in the soil-rice system. Ecotoxicol Environ Saf. 2021;225:112764.

Sui, F., Kang, Y., Wu, H., Li, H., Wang, J., Joseph, S., Munroe, P., Li, L., & Pan, G. (2021). Effects of iron-modified biochar with S-rich and Si-rich feedstocks on Cd immobilization in the soil-rice system. Ecotoxicology and Environmental Safety, 225, 112764. https://doi.org/10.1016/j.ecoenv.2021.112764

Sui F, et al. Effects of Iron-modified Biochar With S-rich and Si-rich Feedstocks On Cd Immobilization in the Soil-rice System. Ecotoxicol Environ Saf. 2021 Dec 1;225:112764. PubMed PMID: 34544024.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Effects of iron-modified biochar with S-rich and Si-rich feedstocks on Cd immobilization in the soil-rice system. AU - Sui,Fengfeng, AU - Kang,Yaxin, AU - Wu,Hao, AU - Li,Hao, AU - Wang,Jingbo, AU - Joseph,Stephen, AU - Munroe,Paul, AU - Li,Lianqing, AU - Pan,Genxing, Y1 - 2021/09/17/ PY - 2021/01/02/received PY - 2021/07/08/revised PY - 2021/09/05/accepted PY - 2021/9/21/pubmed PY - 2021/10/6/medline PY - 2021/9/20/entrez KW - Cd remobilization KW - Fe and S interaction KW - Iron plaque KW - Rape straw KW - Rice husk KW - Rice straw SP - 112764 EP - 112764 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 225 N2 - Fe-modified biochar has been shown to have high sorption ability for cadmium (Cd), while Cd immobilization effects of Fe-modified biochars with Si-rich and S-rich feedstocks have been rarely addressed. To explore the effects of Fe-modified Si-rich and S-rich biochars on Cd translocation in the soil-rice system, a pot experiment was carried out with an acidic Cd-contaminated sandy loam paddy from central South China and a late season rice cultivate during July to November 2018. Rice straw and rice husk were chosen as Si-rich feedstocks, and rape straw was applied as S-rich feedstock, these feedstocks were further collected and pyrolyzed at 450 °C. Pristine and Fe-impregnated rice straw (BRS/BRS-Fe), rice husk (BRH/BRH-Fe) and rape straw (BRE/BRE-Fe) biochars were applied at 0 and 10 t/ha, respectively. The reductions in Cd concentrations in rice grains were 23.8%, 22.3% and 46.1% with treatments of BRE, BRS and BRH, respectively, compared to the control. Compared to other pristine biochars, BRH is more effective in Cd remediation in paddy soil. For Fe-modified biochars, BRE-Fe achieved the highest reductions in Cd concentrations in rice grains with 46.7% and 30.1%, compared with the control and BRE, respectively. BRE-Fe decreased Cd remobilization from leaves to grains. Only BRE-Fe enhanced the formation and Cd sorption capacity of iron plaque. BRS-Fe and BRH-Fe enhanced Fe content in rice plants, which might induce the reduction in iron plaque formation. Fe and S-contained complexes contents increased in the contaminated pristine biochar particles, but reduced in the contaminated BRE-Fe particles. Therefore, Fe modification could not enhance Cd immobilization effect of Si-rich biochar, while Fe modified S-rich biochar has promising potential for Cd remediation with enhancement in iron plaque formation and Cd fixation in rice leaves. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/34544024/Effects_of_iron_modified_biochar_with_S_rich_and_Si_rich_feedstocks_on_Cd_immobilization_in_the_soil_rice_system_ DB - PRIME DP - Unbound Medicine ER -

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Effects of iron-modified biochar with S-rich and Si-rich feedstocks on Cd immobilization in the soil-rice system.Ecotoxicol Environ Saf. 2021 Dec 01; 225:112764.EE