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Mobilization of mercury species under dynamic laboratory redox conditions in a contaminated floodplain soil as affected by biochar and sugar beet factory lime.
Sci Total Environ. 2019 Jul 01; 672:604-617.ST

Abstract

Mercury and its species are toxic and therefore strategies to immobilize them or to impede the formation of bioaccumulative MeHg are a hot topic of ongoing research. Biochar (BC) and sugar beet factory lime (SBFL) are suggested to have the potential to meet these goals. However, their ability to restrain the mobilization of total Hg (Hgt), methylmercury (MeHg), and ethylmercury (EtHg) or the formation of MeHg and EtHg has not been examined to date. Moreover, the effect of systematically altered redox conditions on the release dynamics of Hgt, MeHg, and EtHg in a contaminated floodplain soil as affected by these soil amendments has not been studied. Therefore, we investigated the impact of pre-defined redox conditions on the release dynamics of Hgt, MeHg, and EtHg in a contaminated floodplain soil (CS) and the soil amended with either BC (CS+BC) or SBFL (CS+SBFL). The mobilization of Hgt, MeHg, and EtHg was generally higher at low redox potential (EH) and decreased with increasing EH, irrespective of soil treatment. Both BC and SBFL diminished the release of Hgt from soil but not the methylation and ethylation of Hg. In CS+SBFL approximately half of Hgt was found in solution compared to CS. However, higher methylation efficiency (MeHg/Hgt ratio) was found in CS+SBFL counterbalancing this benefit. Abundances of specific phospholipid fatty acids suggest the presence of sulfate-reducing bacteria, which are considered as primary Hg methylators. The results indicate that both BC and SBFL have the potential to curtail the release of Hgt from inundated soils, while SBFL was more efficient. However, these amendments had no marked effect on the MeHg and EtHg concentrations. Therefore, further research should be conducted to identify soil additives that are capable to reduce the release and formation of these Hg species.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Beckers F
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Soil- and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany.
Mothes S
UFZ Helmholtz Centre for Environmental Research, Department of Analytical Chemistry, Permoserstraβe 15, 04318 Leipzig, Germany.
Abrigata J
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Soil- and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany.
Zhao J
CAS Key Laboratory of Nuclear Analytical Techniques, Key Lab for Biomedical Effects of Nanomaterial and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
Gao Y
CAS Key Laboratory of Nuclear Analytical Techniques, Key Lab for Biomedical Effects of Nanomaterial and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
Rinklebe J
University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Soil- and Groundwater-Management, Pauluskirchstraβe 7, 42285 Wuppertal, Germany; Department of Environment, Energy & Geoinformatics, Sejong University, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea. Electronic address: rinklebe@uni-wuppertal.de.

MeSH

Beta vulgarisCalcium CompoundsCharcoalEnvironmental PollutionEnvironmental Restoration and RemediationMercuryMethylationMethylmercury CompoundsOryzaOxidation-ReductionOxidesSoilSoil PollutantsSugarsVegetables

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30970288

Citation

Beckers, Felix, et al. "Mobilization of Mercury Species Under Dynamic Laboratory Redox Conditions in a Contaminated Floodplain Soil as Affected By Biochar and Sugar Beet Factory Lime." The Science of the Total Environment, vol. 672, 2019, pp. 604-617.
Beckers F, Mothes S, Abrigata J, et al. Mobilization of mercury species under dynamic laboratory redox conditions in a contaminated floodplain soil as affected by biochar and sugar beet factory lime. Sci Total Environ. 2019;672:604-617.
Beckers, F., Mothes, S., Abrigata, J., Zhao, J., Gao, Y., & Rinklebe, J. (2019). Mobilization of mercury species under dynamic laboratory redox conditions in a contaminated floodplain soil as affected by biochar and sugar beet factory lime. The Science of the Total Environment, 672, 604-617. https://doi.org/10.1016/j.scitotenv.2019.03.401
Beckers F, et al. Mobilization of Mercury Species Under Dynamic Laboratory Redox Conditions in a Contaminated Floodplain Soil as Affected By Biochar and Sugar Beet Factory Lime. Sci Total Environ. 2019 Jul 1;672:604-617. PubMed PMID: 30970288.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mobilization of mercury species under dynamic laboratory redox conditions in a contaminated floodplain soil as affected by biochar and sugar beet factory lime. AU - Beckers,Felix, AU - Mothes,Sibylle, AU - Abrigata,Jens, AU - Zhao,Jiating, AU - Gao,Yuxi, AU - Rinklebe,Jörg, Y1 - 2019/03/29/ PY - 2018/12/04/received PY - 2019/03/21/revised PY - 2019/03/25/accepted PY - 2019/4/11/pubmed PY - 2019/6/22/medline PY - 2019/4/11/entrez KW - Agro-environmental management KW - Methyl- and ethylmercury KW - Redox processes KW - Soil additives KW - Wetlands SP - 604 EP - 617 JF - The Science of the total environment JO - Sci Total Environ VL - 672 N2 - Mercury and its species are toxic and therefore strategies to immobilize them or to impede the formation of bioaccumulative MeHg are a hot topic of ongoing research. Biochar (BC) and sugar beet factory lime (SBFL) are suggested to have the potential to meet these goals. However, their ability to restrain the mobilization of total Hg (Hgt), methylmercury (MeHg), and ethylmercury (EtHg) or the formation of MeHg and EtHg has not been examined to date. Moreover, the effect of systematically altered redox conditions on the release dynamics of Hgt, MeHg, and EtHg in a contaminated floodplain soil as affected by these soil amendments has not been studied. Therefore, we investigated the impact of pre-defined redox conditions on the release dynamics of Hgt, MeHg, and EtHg in a contaminated floodplain soil (CS) and the soil amended with either BC (CS+BC) or SBFL (CS+SBFL). The mobilization of Hgt, MeHg, and EtHg was generally higher at low redox potential (EH) and decreased with increasing EH, irrespective of soil treatment. Both BC and SBFL diminished the release of Hgt from soil but not the methylation and ethylation of Hg. In CS+SBFL approximately half of Hgt was found in solution compared to CS. However, higher methylation efficiency (MeHg/Hgt ratio) was found in CS+SBFL counterbalancing this benefit. Abundances of specific phospholipid fatty acids suggest the presence of sulfate-reducing bacteria, which are considered as primary Hg methylators. The results indicate that both BC and SBFL have the potential to curtail the release of Hgt from inundated soils, while SBFL was more efficient. However, these amendments had no marked effect on the MeHg and EtHg concentrations. Therefore, further research should be conducted to identify soil additives that are capable to reduce the release and formation of these Hg species. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30970288/Mobilization_of_mercury_species_under_dynamic_laboratory_redox_conditions_in_a_contaminated_floodplain_soil_as_affected_by_biochar_and_sugar_beet_factory_lime_ DB - PRIME DP - Unbound Medicine ER -