Tags

Type your tag names separated by a space and hit enter

Relative contribution of ferryl ion species (Fe(IV)) and sulfate radical formed in nanoscale zero valent iron activated peroxydisulfate and peroxymonosulfate processes.
Water Res. 2020 Apr 01; 172:115504.WR

Abstract

Activation of persulfates (i.e., peroxydisulfate (PDS) and peroxymonosulfate (PMS)) by nanoscale zero-valent iron (nZVI) is reported to be effective in oxidative treatment of environmental contaminants. It has been widely accepted in numerous literature that sulfate radical (SO4•-) formed from the decomposition of persulfates activated by aqueous Fe(II) released from nZVI corrosion is responsible for the oxidative performance in nZVI/persulfates systems. In this work, by employing methyl phenyl sulfoxide (PMSO) as a probe, we demonstrated that the activation of persulfates by nZVI through electron transfer led to SO4•- formation, while the homogeneous activation of persulfate by the released Fe(II) resulted in ferryl ion species (Fe(IV)) generation in nZVI/persulfates systems. Similarly, nanoscale zero-valent aluminum (nZVAl) and zinc (nZVZn) were also demonstrated to be able to donate electron to persulfates leading to SO4•- formation. However, the insulative aluminum oxide shell hindered the electron transfer leading to the poor persulfates decomposition, while the conductive iron and zinc oxide shell enabled the electron transfer process resulting in a continuous generation of SO4•-. Further, it was obtained that the relative contribution of SO4•- and Fe(IV) in nZVI/persulfates systems was independent of the initial concentration of nZVI and PDS, but was positively correlated with PMS concentration. In addition, the increase of pH from 3 to 7 led to the decrease of the relative contribution of Fe(IV), which was rationalized by the decrease of availability of aqueous Fe(II) at higher pH. Our findings not only shed lights on the nature of the reactive intermediate formed in the nZVI/persulfates systems, but also unprecedentedly distinguished the surface activation of persulfates from the homogeneous catalysis process.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.Key Laboratory of Songliao Aquatic Environment, Ministry of Education, School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun, 130118, China.Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China.Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China. Electronic address: jiangjinhit@126.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31981901

Citation

Wang, Zhen, et al. "Relative Contribution of Ferryl Ion Species (Fe(IV)) and Sulfate Radical Formed in Nanoscale Zero Valent Iron Activated Peroxydisulfate and Peroxymonosulfate Processes." Water Research, vol. 172, 2020, p. 115504.
Wang Z, Qiu W, Pang S, et al. Relative contribution of ferryl ion species (Fe(IV)) and sulfate radical formed in nanoscale zero valent iron activated peroxydisulfate and peroxymonosulfate processes. Water Res. 2020;172:115504.
Wang, Z., Qiu, W., Pang, S., Gao, Y., Zhou, Y., Cao, Y., & Jiang, J. (2020). Relative contribution of ferryl ion species (Fe(IV)) and sulfate radical formed in nanoscale zero valent iron activated peroxydisulfate and peroxymonosulfate processes. Water Research, 172, 115504. https://doi.org/10.1016/j.watres.2020.115504
Wang Z, et al. Relative Contribution of Ferryl Ion Species (Fe(IV)) and Sulfate Radical Formed in Nanoscale Zero Valent Iron Activated Peroxydisulfate and Peroxymonosulfate Processes. Water Res. 2020 Apr 1;172:115504. PubMed PMID: 31981901.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Relative contribution of ferryl ion species (Fe(IV)) and sulfate radical formed in nanoscale zero valent iron activated peroxydisulfate and peroxymonosulfate processes. AU - Wang,Zhen, AU - Qiu,Wei, AU - Pang,Suyan, AU - Gao,Yuan, AU - Zhou,Yang, AU - Cao,Ying, AU - Jiang,Jin, Y1 - 2020/01/15/ PY - 2019/09/19/received PY - 2020/01/06/revised PY - 2020/01/11/accepted PY - 2020/1/26/pubmed PY - 2020/2/25/medline PY - 2020/1/26/entrez KW - Advanced oxidation processes KW - Ferryl ion KW - Nanoscale zero valent iron KW - Peroxydisulfate KW - Peroxymonosulfate KW - Sulfate radical SP - 115504 EP - 115504 JF - Water research JO - Water Res VL - 172 N2 - Activation of persulfates (i.e., peroxydisulfate (PDS) and peroxymonosulfate (PMS)) by nanoscale zero-valent iron (nZVI) is reported to be effective in oxidative treatment of environmental contaminants. It has been widely accepted in numerous literature that sulfate radical (SO4•-) formed from the decomposition of persulfates activated by aqueous Fe(II) released from nZVI corrosion is responsible for the oxidative performance in nZVI/persulfates systems. In this work, by employing methyl phenyl sulfoxide (PMSO) as a probe, we demonstrated that the activation of persulfates by nZVI through electron transfer led to SO4•- formation, while the homogeneous activation of persulfate by the released Fe(II) resulted in ferryl ion species (Fe(IV)) generation in nZVI/persulfates systems. Similarly, nanoscale zero-valent aluminum (nZVAl) and zinc (nZVZn) were also demonstrated to be able to donate electron to persulfates leading to SO4•- formation. However, the insulative aluminum oxide shell hindered the electron transfer leading to the poor persulfates decomposition, while the conductive iron and zinc oxide shell enabled the electron transfer process resulting in a continuous generation of SO4•-. Further, it was obtained that the relative contribution of SO4•- and Fe(IV) in nZVI/persulfates systems was independent of the initial concentration of nZVI and PDS, but was positively correlated with PMS concentration. In addition, the increase of pH from 3 to 7 led to the decrease of the relative contribution of Fe(IV), which was rationalized by the decrease of availability of aqueous Fe(II) at higher pH. Our findings not only shed lights on the nature of the reactive intermediate formed in the nZVI/persulfates systems, but also unprecedentedly distinguished the surface activation of persulfates from the homogeneous catalysis process. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/31981901/Relative_contribution_of_ferryl_ion_species__Fe_IV___and_sulfate_radical_formed_in_nanoscale_zero_valent_iron_activated_peroxydisulfate_and_peroxymonosulfate_processes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(20)30040-3 DB - PRIME DP - Unbound Medicine ER -