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Release dynamics of As, Co, and Mo in a biochar treated soil under pre-definite redox conditions.
Sci Total Environ. 2019 Mar 20; 657:686-695.ST

Abstract

This study assessed the impact of pre-definite redox potential (EH) on the release dynamics and distribution of As, Co, and Mo between the dissolved and colloidal phases as well as their potential mobility and phytoavailability in the sediment phase of a mining soil treated with rice hull biochar (BC). The experiment was conducted from controlled moderately-reducing to oxidizing conditions using an automated biogeochemical microcosm system. Arsenic and Mo were more abundant in the dissolved phase due to their predominant in potential mobile fractions, while Co was more abundant in the colloidal phase due to its association with Fe-(hydr)oxides. Biochar increased the dissolved and colloidal concentrations of As, the dissolved concentration of Co, and the colloidal concentration of Mo under oxidizing condition. On the other hand, the application of BC decreased the dissolved concentration of Mo and the colloidal concentration of Co in the first redox cycle under reducing-acidic condition, due to lower pH values, and chemistry of sulfide-sulfate and Fe/Mn oxides. The phytoavailability of As and Co were higher than their potential mobility in the sediment phase, while the same trend was not discerned for Mo. The potential mobility and phytoavailability of As and Co were high under oxic-acidic conditions. The potential mobility and phytoavailability of Mo might be increased under oxic condition due to the dissolution of Fe and Mn oxides under lower pH conditions, especially in the BC treated soil. Application of such rice hull BC to soil might stimulate the release of As, Co, and Mo under flooding conditions, which might increase the environmental and health risks in such wetland ecosystems.

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Authors+Show Affiliations

El-Naggar A
Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea; Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt; 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. Electronic address: ali_elnaggar@agr.asu.edu.eg.
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; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, Kafr El-Sheikh, 33516, Egypt. Electronic address: smshaheen@agr.kfs.edu.eg.
Hseu ZY
Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan. Electronic address: zyhseu@ntu.edu.tw.
Wang SL
Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan. Electronic address: wangsl@ntu.edu.tw.
Ok YS
Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea. Electronic address: yongsikok@korea.ac.kr.
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; Department of Environment, Energy and Geoinformatics, Sejong University, Seoul 05006, Republic of Korea. Electronic address: rinklebe@uni-wuppertal.de.

MeSH

ArsenicBiological AvailabilityCharcoalChinaCobaltColloidsEnvironmental Restoration and RemediationHydrogen-Ion ConcentrationMiningMolybdenumOxidation-ReductionSoil Pollutants

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30677934

Citation

El-Naggar, Ali, et al. "Release Dynamics of As, Co, and Mo in a Biochar Treated Soil Under Pre-definite Redox Conditions." The Science of the Total Environment, vol. 657, 2019, pp. 686-695.
El-Naggar A, Shaheen SM, Hseu ZY, et al. Release dynamics of As, Co, and Mo in a biochar treated soil under pre-definite redox conditions. Sci Total Environ. 2019;657:686-695.
El-Naggar, A., Shaheen, S. M., Hseu, Z. Y., Wang, S. L., Ok, Y. S., & Rinklebe, J. (2019). Release dynamics of As, Co, and Mo in a biochar treated soil under pre-definite redox conditions. The Science of the Total Environment, 657, 686-695. https://doi.org/10.1016/j.scitotenv.2018.12.026
El-Naggar A, et al. Release Dynamics of As, Co, and Mo in a Biochar Treated Soil Under Pre-definite Redox Conditions. Sci Total Environ. 2019 Mar 20;657:686-695. PubMed PMID: 30677934.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Release dynamics of As, Co, and Mo in a biochar treated soil under pre-definite redox conditions. AU - El-Naggar,Ali, AU - Shaheen,Sabry M, AU - Hseu,Zeng-Yei, AU - Wang,Shan-Li, AU - Ok,Yong Sik, AU - Rinklebe,Jörg, Y1 - 2018/12/05/ PY - 2018/09/07/received PY - 2018/12/03/revised PY - 2018/12/03/accepted PY - 2019/1/26/entrez PY - 2019/1/27/pubmed PY - 2019/2/15/medline KW - Black carbon KW - Sediment KW - Soil contamination KW - Trace elements KW - Wetland ecosystem SP - 686 EP - 695 JF - The Science of the total environment JO - Sci Total Environ VL - 657 N2 - This study assessed the impact of pre-definite redox potential (EH) on the release dynamics and distribution of As, Co, and Mo between the dissolved and colloidal phases as well as their potential mobility and phytoavailability in the sediment phase of a mining soil treated with rice hull biochar (BC). The experiment was conducted from controlled moderately-reducing to oxidizing conditions using an automated biogeochemical microcosm system. Arsenic and Mo were more abundant in the dissolved phase due to their predominant in potential mobile fractions, while Co was more abundant in the colloidal phase due to its association with Fe-(hydr)oxides. Biochar increased the dissolved and colloidal concentrations of As, the dissolved concentration of Co, and the colloidal concentration of Mo under oxidizing condition. On the other hand, the application of BC decreased the dissolved concentration of Mo and the colloidal concentration of Co in the first redox cycle under reducing-acidic condition, due to lower pH values, and chemistry of sulfide-sulfate and Fe/Mn oxides. The phytoavailability of As and Co were higher than their potential mobility in the sediment phase, while the same trend was not discerned for Mo. The potential mobility and phytoavailability of As and Co were high under oxic-acidic conditions. The potential mobility and phytoavailability of Mo might be increased under oxic condition due to the dissolution of Fe and Mn oxides under lower pH conditions, especially in the BC treated soil. Application of such rice hull BC to soil might stimulate the release of As, Co, and Mo under flooding conditions, which might increase the environmental and health risks in such wetland ecosystems. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30677934/Release_dynamics_of_As_Co_and_Mo_in_a_biochar_treated_soil_under_pre_definite_redox_conditions_ DB - PRIME DP - Unbound Medicine ER -