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Effective in-situ reduction of Cr(VI) from leather wastewater by advanced reduction process based on CO2·- with visible-light photocatalyst.
Chemosphere. 2021 Jan; 263:127898.C

Abstract

Advanced reduction process (ARP) has drawn an increasing interest as a new manner for removing oxidative pollutants in water. In this paper, we demonstrate the possibility of in-situ reduction of Cr(VI) by CO2·- produced from formate originally existing in leather wastewater by visible-light-driven ARP containing black TiO2 photocatalyst. The prepared black TiO2 with nanotube structure achieves remarkable enhanced the reduction rate of Cr(VI) as high as 96.2% (k = 0.0114 min-1) in the presence of formate, which is approximately 4.75 times than that of 56.3% (k = 0.0024 min-1) in the absence under 120 min visible-light irradiate at unadjusted pH. The results exhibit a distinct contrast with commercial TiO2 (P25). A series of control experiments are also performed, indicating that formate is able to convert the oxidative environment into a highly reductive one, and the formate concentration, black TiO2 dosage and pH may greatly impact on the Cr(VI) reduction rate. According to the electron spin resonance (ESR) measurement, CO2·- radicals can be directly verified as dominate radical in this system. Moreover, this system appears to be attractive for creating photochemical systems where in-situ production of CO2·- radicals may be realized by using formate. Then this in-situ ARP system will provide a new perspective for the Cr(VI) removing, which makes leather wastewater treatment much easier and more sustainable in the future.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China. Electronic address: sjyou@hit.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32828054

Citation

Liu, Xuefeng, et al. "Effective In-situ Reduction of Cr(VI) From Leather Wastewater By Advanced Reduction Process Based On CO2·- With Visible-light Photocatalyst." Chemosphere, vol. 263, 2021, p. 127898.
Liu X, Liu G, You S. Effective in-situ reduction of Cr(VI) from leather wastewater by advanced reduction process based on CO2·- with visible-light photocatalyst. Chemosphere. 2021;263:127898.
Liu, X., Liu, G., & You, S. (2021). Effective in-situ reduction of Cr(VI) from leather wastewater by advanced reduction process based on CO2·- with visible-light photocatalyst. Chemosphere, 263, 127898. https://doi.org/10.1016/j.chemosphere.2020.127898
Liu X, Liu G, You S. Effective In-situ Reduction of Cr(VI) From Leather Wastewater By Advanced Reduction Process Based On CO2·- With Visible-light Photocatalyst. Chemosphere. 2021;263:127898. PubMed PMID: 32828054.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effective in-situ reduction of Cr(VI) from leather wastewater by advanced reduction process based on CO2·- with visible-light photocatalyst. AU - Liu,Xuefeng, AU - Liu,Guoshuai, AU - You,Shijie, Y1 - 2020/08/12/ PY - 2020/05/08/received PY - 2020/07/16/revised PY - 2020/08/01/accepted PY - 2020/8/23/pubmed PY - 2020/8/23/medline PY - 2020/8/23/entrez KW - Black TiO(2) KW - Carboxyl dioxide anion radical KW - In-situ advanced reduction process KW - Leather wastewater KW - Visible light SP - 127898 EP - 127898 JF - Chemosphere JO - Chemosphere VL - 263 N2 - Advanced reduction process (ARP) has drawn an increasing interest as a new manner for removing oxidative pollutants in water. In this paper, we demonstrate the possibility of in-situ reduction of Cr(VI) by CO2·- produced from formate originally existing in leather wastewater by visible-light-driven ARP containing black TiO2 photocatalyst. The prepared black TiO2 with nanotube structure achieves remarkable enhanced the reduction rate of Cr(VI) as high as 96.2% (k = 0.0114 min-1) in the presence of formate, which is approximately 4.75 times than that of 56.3% (k = 0.0024 min-1) in the absence under 120 min visible-light irradiate at unadjusted pH. The results exhibit a distinct contrast with commercial TiO2 (P25). A series of control experiments are also performed, indicating that formate is able to convert the oxidative environment into a highly reductive one, and the formate concentration, black TiO2 dosage and pH may greatly impact on the Cr(VI) reduction rate. According to the electron spin resonance (ESR) measurement, CO2·- radicals can be directly verified as dominate radical in this system. Moreover, this system appears to be attractive for creating photochemical systems where in-situ production of CO2·- radicals may be realized by using formate. Then this in-situ ARP system will provide a new perspective for the Cr(VI) removing, which makes leather wastewater treatment much easier and more sustainable in the future. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32828054/Effective_in_situ_reduction_of_Cr_VI__from_leather_wastewater_by_advanced_reduction_process_based_on_CO2·__with_visible_light_photocatalyst_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)32093-2 DB - PRIME DP - Unbound Medicine ER -