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Adsorption and catalytic oxidation of arsenite on Fe-Mn nodules in the presence of oxygen.
Chemosphere. 2020 Nov; 259:127503.C

Abstract

Fe-Mn nodules affect the speciation, transformation and migration of arsenic (As) via redox and adsorption reactions. However, few studies have been concerned with their interaction in the presence of dissolved oxygen. In this work, the interaction mechanism of As(III) and Fe-Mn nodules was studied in different atmospheres. The influence of pH, dissolved oxygen concentration and chemical composition of nodules on the reaction was also investigated. The results indicated that manganese oxides and iron oxides in nodules respectively contribute to As(III) oxidation and As(III,V) adsorption. Under oxic conditions, Fe-Mn nodules acted as a catalyst to accelerate the oxidation of Mn(II) to Mn(III,V) oxides, which significantly enhanced As(III) oxidation. In the system containing 10 mg L-1 As(III) and 1.0 g L-1 Fe-Mn nodules, the maximum oxidation capacity of As(III) reached 3.22, 3.48 and 3.71 mg g-1, and the corresponding As(III,V) adsorption capacity reached 2.49, 2.40, and 2.39 mg g-1 in nitrogen, air and oxygen atmosphere, respectively. The oxidation capacity of As(III) increased and decreased with increasing dissolved oxygen concentration and pH, respectively. This work clarifies the mechanism of As(III) oxidation by soil Fe-Mn nodules in various systems and contributes to a better understanding of the behaviors and fate of As in environments.

Authors+Show Affiliations

Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China; Soils and Water Department, Faculty of Agriculture, Al-Azhar University, Cairo, 11651, Egypt.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, Zhejiang Province, China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China. Electronic address: qiugh@mail.hzau.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32645597

Citation

Rady, Omar, et al. "Adsorption and Catalytic Oxidation of Arsenite On Fe-Mn Nodules in the Presence of Oxygen." Chemosphere, vol. 259, 2020, p. 127503.
Rady O, Liu L, Yang X, et al. Adsorption and catalytic oxidation of arsenite on Fe-Mn nodules in the presence of oxygen. Chemosphere. 2020;259:127503.
Rady, O., Liu, L., Yang, X., Tang, X., Tan, W., & Qiu, G. (2020). Adsorption and catalytic oxidation of arsenite on Fe-Mn nodules in the presence of oxygen. Chemosphere, 259, 127503. https://doi.org/10.1016/j.chemosphere.2020.127503
Rady O, et al. Adsorption and Catalytic Oxidation of Arsenite On Fe-Mn Nodules in the Presence of Oxygen. Chemosphere. 2020;259:127503. PubMed PMID: 32645597.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption and catalytic oxidation of arsenite on Fe-Mn nodules in the presence of oxygen. AU - Rady,Omar, AU - Liu,Lihu, AU - Yang,Xiong, AU - Tang,Xianjin, AU - Tan,Wenfeng, AU - Qiu,Guohong, Y1 - 2020/06/30/ PY - 2020/01/23/received PY - 2020/06/15/revised PY - 2020/06/17/accepted PY - 2020/7/10/pubmed PY - 2020/11/4/medline PY - 2020/7/10/entrez KW - Adsorption KW - Arsenic KW - Catalytic oxidation KW - Fe-Mn nodules KW - Redox SP - 127503 EP - 127503 JF - Chemosphere JO - Chemosphere VL - 259 N2 - Fe-Mn nodules affect the speciation, transformation and migration of arsenic (As) via redox and adsorption reactions. However, few studies have been concerned with their interaction in the presence of dissolved oxygen. In this work, the interaction mechanism of As(III) and Fe-Mn nodules was studied in different atmospheres. The influence of pH, dissolved oxygen concentration and chemical composition of nodules on the reaction was also investigated. The results indicated that manganese oxides and iron oxides in nodules respectively contribute to As(III) oxidation and As(III,V) adsorption. Under oxic conditions, Fe-Mn nodules acted as a catalyst to accelerate the oxidation of Mn(II) to Mn(III,V) oxides, which significantly enhanced As(III) oxidation. In the system containing 10 mg L-1 As(III) and 1.0 g L-1 Fe-Mn nodules, the maximum oxidation capacity of As(III) reached 3.22, 3.48 and 3.71 mg g-1, and the corresponding As(III,V) adsorption capacity reached 2.49, 2.40, and 2.39 mg g-1 in nitrogen, air and oxygen atmosphere, respectively. The oxidation capacity of As(III) increased and decreased with increasing dissolved oxygen concentration and pH, respectively. This work clarifies the mechanism of As(III) oxidation by soil Fe-Mn nodules in various systems and contributes to a better understanding of the behaviors and fate of As in environments. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32645597/Adsorption_and_catalytic_oxidation_of_arsenite_on_Fe_Mn_nodules_in_the_presence_of_oxygen_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)31697-0 DB - PRIME DP - Unbound Medicine ER -