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Electrochemical degradation of three phthalate esters in synthetic wastewater by using a Ce-doped Ti/PbO2 electrode.
Chemosphere. 2020 Nov; 259:127488.C

Abstract

A Ce-doped Ti/PbO2 electrode was prepared in a deposition solution containing Ce3+ and Pb2+ ions by electrodeposition, and the surface morphology, crystal structure and elemental states were characterized by SEM, XRD and XPS. The electrode was used to investigate the simultaneous degradation of three phthalate esters (PAEs), i.e., dimethyl phthalate (DMP), diethyl phthalate (DEP) and dibutyl phthalate (DBP) in synthetic wastewaters. The results showed that the electrode exhibited excellent electrocatalytic activity and good reusability and stability, and the removal efficiencies of 5 mg L-1 DBP, DMP and DEP in 0.05 M Na2SO4 (pH 7) reached 98.2%, 95.8% and 81.1% at current density of 25 mA cm-2 after 10 h degradation, respectively. The degradation processes followed pseudo first-order kinetic model very well, and the observed rate constants of DBP, DEP and DMP were 0.42, 0.40 and 0.29 h-1, respectively. The energy consumption in three PAEs degradation was also assessed. The main degradation products of the three PAEs were identified by using liquid chromatography-tandem mass spectrometry, and the possible degradation pathways mainly included dealkylation, hydroxyl addition, decarboxylation and benzene ring cleavage. This work is a promising candidate for efficient treatment of multiple PAEs in wastewater and protection of the aquatic ecological environment.

Authors+Show Affiliations

College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China; Faculty of Chemical and Pharmaceutical Engineering, Chongqing Industry Polytechnic College, Chongqing, 401120, PR China.College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China.College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China.College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China.Technical Centre, Chongqing Customs, Chongqing Engineering Technology Research Center of Import and Export Food Safety, Chongqing, 400020, PR China.College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China.College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China. Electronic address: jzhzhang@swu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32640376

Citation

Deng, Dongli, et al. "Electrochemical Degradation of Three Phthalate Esters in Synthetic Wastewater By Using a Ce-doped Ti/PbO2 Electrode." Chemosphere, vol. 259, 2020, p. 127488.
Deng D, Wu X, Li M, et al. Electrochemical degradation of three phthalate esters in synthetic wastewater by using a Ce-doped Ti/PbO2 electrode. Chemosphere. 2020;259:127488.
Deng, D., Wu, X., Li, M., Qian, S., Tang, B., Wei, S., & Zhang, J. (2020). Electrochemical degradation of three phthalate esters in synthetic wastewater by using a Ce-doped Ti/PbO2 electrode. Chemosphere, 259, 127488. https://doi.org/10.1016/j.chemosphere.2020.127488
Deng D, et al. Electrochemical Degradation of Three Phthalate Esters in Synthetic Wastewater By Using a Ce-doped Ti/PbO2 Electrode. Chemosphere. 2020;259:127488. PubMed PMID: 32640376.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical degradation of three phthalate esters in synthetic wastewater by using a Ce-doped Ti/PbO2 electrode. AU - Deng,Dongli, AU - Wu,Xiaohua, AU - Li,Mingyuan, AU - Qian,Sheng, AU - Tang,Bobin, AU - Wei,Shiqiang, AU - Zhang,Jinzhong, Y1 - 2020/06/30/ PY - 2020/03/17/received PY - 2020/06/21/revised PY - 2020/06/22/accepted PY - 2020/7/9/pubmed PY - 2020/11/4/medline PY - 2020/7/9/entrez KW - Ce-doped Ti/PbO(2) electrode KW - Degradation pathways KW - Electrochemical degradation KW - Energy consumption KW - Phthalate esters SP - 127488 EP - 127488 JF - Chemosphere JO - Chemosphere VL - 259 N2 - A Ce-doped Ti/PbO2 electrode was prepared in a deposition solution containing Ce3+ and Pb2+ ions by electrodeposition, and the surface morphology, crystal structure and elemental states were characterized by SEM, XRD and XPS. The electrode was used to investigate the simultaneous degradation of three phthalate esters (PAEs), i.e., dimethyl phthalate (DMP), diethyl phthalate (DEP) and dibutyl phthalate (DBP) in synthetic wastewaters. The results showed that the electrode exhibited excellent electrocatalytic activity and good reusability and stability, and the removal efficiencies of 5 mg L-1 DBP, DMP and DEP in 0.05 M Na2SO4 (pH 7) reached 98.2%, 95.8% and 81.1% at current density of 25 mA cm-2 after 10 h degradation, respectively. The degradation processes followed pseudo first-order kinetic model very well, and the observed rate constants of DBP, DEP and DMP were 0.42, 0.40 and 0.29 h-1, respectively. The energy consumption in three PAEs degradation was also assessed. The main degradation products of the three PAEs were identified by using liquid chromatography-tandem mass spectrometry, and the possible degradation pathways mainly included dealkylation, hydroxyl addition, decarboxylation and benzene ring cleavage. This work is a promising candidate for efficient treatment of multiple PAEs in wastewater and protection of the aquatic ecological environment. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32640376/Electrochemical_degradation_of_three_phthalate_esters_in_synthetic_wastewater_by_using_a_Ce_doped_Ti/PbO2_electrode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)31682-9 DB - PRIME DP - Unbound Medicine ER -