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Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate.
Chemosphere. 2020 Jan; 238:124687.C

Abstract

The development of highly efficient and green catalytic oxidation process based on peroxymonosulfate (PMS) activation has been identified to be a significant yet challenging objective in the environmental catalysis field. A simple, environmentally benign and highly effective catalytic oxidation system was innovatively constructed by coupling NaBO2 and PMS for the removal of Acid Red 1. The catalytic mechanism in the NaBO2/PMS system was elucidated by electron paramagnetic resonance (EPR) combined with several radical capture reagents (ascorbic acid, methanol, tert-butyl alcohol, ethanol and l-histidine). The experimental results indicated that singlet oxygen (1O2) severed as the predominant reactive oxygen species (ROS) rather than the HO or during the catalytic oxidation process, at variance with the reported radical pathway in the Co2+/PMS system. Inspiringly, p-benzoquinone (p-BQ) as a trapping agent in most advanced oxidation process could be turned into the positive one in the NaBO2/PMS system, achieving a nearly 3-times enhancement in terms of the rate constant for AR1 removal. More interestingly, sodium chloride (NaCl) presented the same enhancement effect as p-benzoquinone due to generation of hypochlorous acid (HOCl) and more 1O2, which was completely different from the reported. This study develops a highly efficient green oxidation process and opens up a new insight in the remediation of contaminated water.

Authors+Show Affiliations

National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China. Electronic address: yyy0571@126.com.National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31524622

Citation

Rao, Longjun, et al. "Highly Efficient Removal of Organic Pollutants Via a Green Catalytic Oxidation System Based On Sodium Metaborate and Peroxymonosulfate." Chemosphere, vol. 238, 2020, p. 124687.
Rao L, Yang Y, Chen L, et al. Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate. Chemosphere. 2020;238:124687.
Rao, L., Yang, Y., Chen, L., Liu, X., Chen, H., Yao, Y., & Wang, W. (2020). Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate. Chemosphere, 238, 124687. https://doi.org/10.1016/j.chemosphere.2019.124687
Rao L, et al. Highly Efficient Removal of Organic Pollutants Via a Green Catalytic Oxidation System Based On Sodium Metaborate and Peroxymonosulfate. Chemosphere. 2020;238:124687. PubMed PMID: 31524622.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Highly efficient removal of organic pollutants via a green catalytic oxidation system based on sodium metaborate and peroxymonosulfate. AU - Rao,Longjun, AU - Yang,Yunfei, AU - Chen,Likun, AU - Liu,Xiudan, AU - Chen,Haixiang, AU - Yao,Yuyuan, AU - Wang,Wentao, Y1 - 2019/08/27/ PY - 2019/05/03/received PY - 2019/07/22/revised PY - 2019/08/26/accepted PY - 2019/9/17/pubmed PY - 2020/1/10/medline PY - 2019/9/17/entrez KW - Enhancement KW - Environmental-friendly KW - Peroxymonosulfate activation KW - Singlet oxygen KW - Sodium metaborate SP - 124687 EP - 124687 JF - Chemosphere JO - Chemosphere VL - 238 N2 - The development of highly efficient and green catalytic oxidation process based on peroxymonosulfate (PMS) activation has been identified to be a significant yet challenging objective in the environmental catalysis field. A simple, environmentally benign and highly effective catalytic oxidation system was innovatively constructed by coupling NaBO2 and PMS for the removal of Acid Red 1. The catalytic mechanism in the NaBO2/PMS system was elucidated by electron paramagnetic resonance (EPR) combined with several radical capture reagents (ascorbic acid, methanol, tert-butyl alcohol, ethanol and l-histidine). The experimental results indicated that singlet oxygen (1O2) severed as the predominant reactive oxygen species (ROS) rather than the HO or during the catalytic oxidation process, at variance with the reported radical pathway in the Co2+/PMS system. Inspiringly, p-benzoquinone (p-BQ) as a trapping agent in most advanced oxidation process could be turned into the positive one in the NaBO2/PMS system, achieving a nearly 3-times enhancement in terms of the rate constant for AR1 removal. More interestingly, sodium chloride (NaCl) presented the same enhancement effect as p-benzoquinone due to generation of hypochlorous acid (HOCl) and more 1O2, which was completely different from the reported. This study develops a highly efficient green oxidation process and opens up a new insight in the remediation of contaminated water. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31524622/Highly_efficient_removal_of_organic_pollutants_via_a_green_catalytic_oxidation_system_based_on_sodium_metaborate_and_peroxymonosulfate_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)31911-3 DB - PRIME DP - Unbound Medicine ER -