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Elucidating the redox-driven dynamic interactions between arsenic and iron-impregnated biochar in a paddy soil using geochemical and spectroscopic techniques.
J Hazard Mater. 2022 01 15; 422:126808.JH

Abstract

Iron (Fe)-modified biochar, a renewable amendment that synthetizes the functions of biochar and Fe materials, demonstrates a potential to remediate arsenic (As)-contaminated soils. However, the effectiveness of Fe-based biochar to immobilize As in paddy soils under varying redox conditions (Eh) has not been quantified. We tested the capability of the raw (RBC) and Fe-impregnated (FeBC) biochars to immobilize As in a paddy soil under various Eh conditions (from -400 to +300 mV) using a biogeochemical microcosm system. In the control, As was mobilized (686.2-1535.8 μg L-1) under reducing conditions and immobilized (61.6-71.1 μg L-1) under oxidizing conditions. Application of FeBC immobilized As at Eh < 0 mV by 32.6%-81.1%, compared to the control, because of the transformation of As-bound Fe (hydro)oxides (e.g., ferrihydrite) and the formation of complexes (e.g., ternary As-Fe-DOC). Application of RBC immobilized As at Eh < -100 mV by 16.0%-41.3%, compared to the control, due to its porous structure and oxygen-containing functional groups. Mobilized As at Eh > +200 mV was caused by the increase of pH after RBC application. Amendment of the Fe-modified biochar can be a suitable approach for alleviating the environmental risk of As under reducing conditions in paddy soils.

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Authors+Show Affiliations

Yang X
Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil, and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany.
Shaheen SM
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil, and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, Jeddah 21589, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33 516 Kafr El-Sheikh, Egypt.
Wang J
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
Hou D
Tsinghua University, School of Environment, Beijing 100084, China.
Ok YS
Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea.
Wang SL
Department of Agricultural Chemistry, National Taiwan University, 1 Sect. 4, Roosevelt Rd., Taipei 10617, Taiwan, ROC.
Wang H
Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China. Electronic address: hailong.wang@fosu.edu.cn.
Rinklebe J
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil, and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany; University of Sejong, Department of Environment, Energy and Geoinformatics, Seoul, Guangjin-Gu 05006, Republic of Korea. Electronic address: rinklebe@uni-wuppertal.de.

MeSH

ArsenicCharcoalIronOryzaOxidation-ReductionSoilSoil Pollutants

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

34399221

Citation

Yang, Xing, et al. "Elucidating the Redox-driven Dynamic Interactions Between Arsenic and Iron-impregnated Biochar in a Paddy Soil Using Geochemical and Spectroscopic Techniques." Journal of Hazardous Materials, vol. 422, 2022, p. 126808.
Yang X, Shaheen SM, Wang J, et al. Elucidating the redox-driven dynamic interactions between arsenic and iron-impregnated biochar in a paddy soil using geochemical and spectroscopic techniques. J Hazard Mater. 2022;422:126808.
Yang, X., Shaheen, S. M., Wang, J., Hou, D., Ok, Y. S., Wang, S. L., Wang, H., & Rinklebe, J. (2022). Elucidating the redox-driven dynamic interactions between arsenic and iron-impregnated biochar in a paddy soil using geochemical and spectroscopic techniques. Journal of Hazardous Materials, 422, 126808. https://doi.org/10.1016/j.jhazmat.2021.126808
Yang X, et al. Elucidating the Redox-driven Dynamic Interactions Between Arsenic and Iron-impregnated Biochar in a Paddy Soil Using Geochemical and Spectroscopic Techniques. J Hazard Mater. 2022 01 15;422:126808. PubMed PMID: 34399221.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Elucidating the redox-driven dynamic interactions between arsenic and iron-impregnated biochar in a paddy soil using geochemical and spectroscopic techniques. AU - Yang,Xing, AU - Shaheen,Sabry M, AU - Wang,Jianxu, AU - Hou,Deyi, AU - Ok,Yong Sik, AU - Wang,Shan-Li, AU - Wang,Hailong, AU - Rinklebe,Jörg, Y1 - 2021/08/16/ PY - 2021/06/08/received PY - 2021/07/18/revised PY - 2021/07/31/accepted PY - 2021/8/17/pubmed PY - 2021/11/24/medline PY - 2021/8/16/entrez KW - Fe-based biochar KW - Immobilization mechanisms KW - Redox conditions KW - Soil remediation KW - Toxic metal(loid)s SP - 126808 EP - 126808 JF - Journal of hazardous materials JO - J Hazard Mater VL - 422 N2 - Iron (Fe)-modified biochar, a renewable amendment that synthetizes the functions of biochar and Fe materials, demonstrates a potential to remediate arsenic (As)-contaminated soils. However, the effectiveness of Fe-based biochar to immobilize As in paddy soils under varying redox conditions (Eh) has not been quantified. We tested the capability of the raw (RBC) and Fe-impregnated (FeBC) biochars to immobilize As in a paddy soil under various Eh conditions (from -400 to +300 mV) using a biogeochemical microcosm system. In the control, As was mobilized (686.2-1535.8 μg L-1) under reducing conditions and immobilized (61.6-71.1 μg L-1) under oxidizing conditions. Application of FeBC immobilized As at Eh < 0 mV by 32.6%-81.1%, compared to the control, because of the transformation of As-bound Fe (hydro)oxides (e.g., ferrihydrite) and the formation of complexes (e.g., ternary As-Fe-DOC). Application of RBC immobilized As at Eh < -100 mV by 16.0%-41.3%, compared to the control, due to its porous structure and oxygen-containing functional groups. Mobilized As at Eh > +200 mV was caused by the increase of pH after RBC application. Amendment of the Fe-modified biochar can be a suitable approach for alleviating the environmental risk of As under reducing conditions in paddy soils. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/34399221/Elucidating_the_redox_driven_dynamic_interactions_between_arsenic_and_iron_impregnated_biochar_in_a_paddy_soil_using_geochemical_and_spectroscopic_techniques_ DB - PRIME DP - Unbound Medicine ER -