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Ferrous-activated persulfate oxidation of arsenic(III) and diuron in aquatic system.
J Hazard Mater. 2013 Dec 15; 263 Pt 2:422-30.JH

Abstract

In situ chemical oxidation (ISCO) can be an effective technology for the remediation of soil and groundwater polluted by organic and inorganic contaminants. This study investigated the oxidation of arsenic(III) (As(III)) and diuron using ferrous activated persulfate-based ISCO. The results indicated that Fe(II)/persulfate oxidation could be an effective method to oxidize As(III) and diuron. Effects of pH, S2O8(2-) and Fe(II) amounts on the destruction of As(III) and diuron were examined in batch experiments. Acidic conditions favored the removal of As(III) and diuron. Four chelating agents, citric acid (CA), Na2S2O3, diethylene triamine pentaacetic acid (DTPA) and ethylene diamine tetraacetic acid disodium (EDTA-Na2) were used in attempt to maintain the quantity of ferrous ion in solution. In our experiments, CA and Na2S2O3 were found to be more effective than DTPA and EDTA-Na2. Our results also revealed a widely practical prospect of inorganic chelating agent Na2S2O3. Hydroxyl and sulfate radical were determined to play key roles in the oxidation process by using ethanol and tertiary butanol as molecular probes. Oxidation of As(III) yielded As(V) via the electron-transfer reaction. In the oxidation process of diuron, a stepwise nucleophilic substitution of chlorine by hydroxyl and a stepwise oxidation process of the methyl on the dimethylurea group by hydroxyl and sulfate radical were proposed.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

24220194

Citation

Zhou, Lei, et al. "Ferrous-activated Persulfate Oxidation of arsenic(III) and Diuron in Aquatic System." Journal of Hazardous Materials, vol. 263 Pt 2, 2013, pp. 422-30.
Zhou L, Zheng W, Ji Y, et al. Ferrous-activated persulfate oxidation of arsenic(III) and diuron in aquatic system. J Hazard Mater. 2013;263 Pt 2:422-30.
Zhou, L., Zheng, W., Ji, Y., Zhang, J., Zeng, C., Zhang, Y., Wang, Q., & Yang, X. (2013). Ferrous-activated persulfate oxidation of arsenic(III) and diuron in aquatic system. Journal of Hazardous Materials, 263 Pt 2, 422-30. https://doi.org/10.1016/j.jhazmat.2013.09.056
Zhou L, et al. Ferrous-activated Persulfate Oxidation of arsenic(III) and Diuron in Aquatic System. J Hazard Mater. 2013 Dec 15;263 Pt 2:422-30. PubMed PMID: 24220194.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ferrous-activated persulfate oxidation of arsenic(III) and diuron in aquatic system. AU - Zhou,Lei, AU - Zheng,Wei, AU - Ji,Yuefei, AU - Zhang,Jinfeng, AU - Zeng,Chao, AU - Zhang,Ya, AU - Wang,Qi, AU - Yang,Xi, Y1 - 2013/10/01/ PY - 2013/06/10/received PY - 2013/09/22/revised PY - 2013/09/24/accepted PY - 2013/11/14/entrez PY - 2013/11/14/pubmed PY - 2014/8/15/medline KW - Arsenic(III) KW - Chelating agent KW - Diuron KW - Ferrous-activated persulfate oxidation KW - In situ chemical oxidation SP - 422 EP - 30 JF - Journal of hazardous materials JO - J Hazard Mater VL - 263 Pt 2 N2 - In situ chemical oxidation (ISCO) can be an effective technology for the remediation of soil and groundwater polluted by organic and inorganic contaminants. This study investigated the oxidation of arsenic(III) (As(III)) and diuron using ferrous activated persulfate-based ISCO. The results indicated that Fe(II)/persulfate oxidation could be an effective method to oxidize As(III) and diuron. Effects of pH, S2O8(2-) and Fe(II) amounts on the destruction of As(III) and diuron were examined in batch experiments. Acidic conditions favored the removal of As(III) and diuron. Four chelating agents, citric acid (CA), Na2S2O3, diethylene triamine pentaacetic acid (DTPA) and ethylene diamine tetraacetic acid disodium (EDTA-Na2) were used in attempt to maintain the quantity of ferrous ion in solution. In our experiments, CA and Na2S2O3 were found to be more effective than DTPA and EDTA-Na2. Our results also revealed a widely practical prospect of inorganic chelating agent Na2S2O3. Hydroxyl and sulfate radical were determined to play key roles in the oxidation process by using ethanol and tertiary butanol as molecular probes. Oxidation of As(III) yielded As(V) via the electron-transfer reaction. In the oxidation process of diuron, a stepwise nucleophilic substitution of chlorine by hydroxyl and a stepwise oxidation process of the methyl on the dimethylurea group by hydroxyl and sulfate radical were proposed. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/24220194/Ferrous_activated_persulfate_oxidation_of_arsenic_III__and_diuron_in_aquatic_system_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(13)00700-0 DB - PRIME DP - Unbound Medicine ER -