Tags

Type your tag names separated by a space and hit enter

Highly efficient and mild electrochemical mineralization of long-chain perfluorocarboxylic acids (C9-C10) by Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD electrodes.
Environ Sci Technol. 2013 Nov 19; 47(22):13039-46.ES

Abstract

The electrochemical mineralization of environmentally persistent long-chain perfluorinated carboxylic acids (PFCAs), i.e., perfluorononanoic acid (C8F17COOH, PFNA) and perfluorodecanoic acid (C9F19COOH, PFDA) was investigated in aqueous solutions (0.25 mmol L(-1)) over Ti/SnO2-Sb-Ce (SnO2), Ti/SnO2-Sb/Ce-PbO2 (PbO2), and Ti/BDD (BDD) anodes under galvanostatic control at room temperature. Based on PFCA decay rate, total organic carbon (TOC) reduction, defluorination ratio, safety, and energy consumption, the performance of PbO2 electrode was comparable with that of BDD electrode. After 180 min electrolysis, the PFNA removals on BDD and PbO2 electrodes were 98.7 ± 0.4% and 97.1 ± 1.0%, respectively, while the corresponding PFDA removals were 96.0 ± 1.4% and 92.2 ± 1.9%. SnO2 electrode yielded lower PFCA removals and led to notable secondary pollution by Sb ions. The primary mineralization product, F(-), as well as trace amounts of intermediate PFCAs with shortened chain lengths, were detected in aqueous solution after electrolysis. On the basis of these results, a degradation mechanism including three potential routes is proposed: via formation of short-chain PFCAs by stepwise removal of CF2; direct mineralization to CO2 and HF; conversion to volatile fluorinated organic compounds. The results presented here demonstrate that electrochemical technique exhibits high efficiency in mineralizing PFNA and PFDA under mild conditions, and is promising for the treatment of long-chain PFCAs in wastewater.

Authors+Show Affiliations

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, P.R. China.No 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

24164589

Citation

Lin, Hui, et al. "Highly Efficient and Mild Electrochemical Mineralization of Long-chain Perfluorocarboxylic Acids (C9-C10) By Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD Electrodes." Environmental Science & Technology, vol. 47, no. 22, 2013, pp. 13039-46.
Lin H, Niu J, Xu J, et al. Highly efficient and mild electrochemical mineralization of long-chain perfluorocarboxylic acids (C9-C10) by Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD electrodes. Environ Sci Technol. 2013;47(22):13039-46.
Lin, H., Niu, J., Xu, J., Huang, H., Li, D., Yue, Z., & Feng, C. (2013). Highly efficient and mild electrochemical mineralization of long-chain perfluorocarboxylic acids (C9-C10) by Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD electrodes. Environmental Science & Technology, 47(22), 13039-46. https://doi.org/10.1021/es4034414
Lin H, et al. Highly Efficient and Mild Electrochemical Mineralization of Long-chain Perfluorocarboxylic Acids (C9-C10) By Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD Electrodes. Environ Sci Technol. 2013 Nov 19;47(22):13039-46. PubMed PMID: 24164589.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Highly efficient and mild electrochemical mineralization of long-chain perfluorocarboxylic acids (C9-C10) by Ti/SnO2-Sb-Ce, Ti/SnO2-Sb/Ce-PbO2, and Ti/BDD electrodes. AU - Lin,Hui, AU - Niu,Junfeng, AU - Xu,Jiale, AU - Huang,Haiou, AU - Li,Duo, AU - Yue,Zhihan, AU - Feng,Chenghong, Y1 - 2013/10/28/ PY - 2013/10/30/entrez PY - 2013/10/30/pubmed PY - 2014/12/15/medline SP - 13039 EP - 46 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 47 IS - 22 N2 - The electrochemical mineralization of environmentally persistent long-chain perfluorinated carboxylic acids (PFCAs), i.e., perfluorononanoic acid (C8F17COOH, PFNA) and perfluorodecanoic acid (C9F19COOH, PFDA) was investigated in aqueous solutions (0.25 mmol L(-1)) over Ti/SnO2-Sb-Ce (SnO2), Ti/SnO2-Sb/Ce-PbO2 (PbO2), and Ti/BDD (BDD) anodes under galvanostatic control at room temperature. Based on PFCA decay rate, total organic carbon (TOC) reduction, defluorination ratio, safety, and energy consumption, the performance of PbO2 electrode was comparable with that of BDD electrode. After 180 min electrolysis, the PFNA removals on BDD and PbO2 electrodes were 98.7 ± 0.4% and 97.1 ± 1.0%, respectively, while the corresponding PFDA removals were 96.0 ± 1.4% and 92.2 ± 1.9%. SnO2 electrode yielded lower PFCA removals and led to notable secondary pollution by Sb ions. The primary mineralization product, F(-), as well as trace amounts of intermediate PFCAs with shortened chain lengths, were detected in aqueous solution after electrolysis. On the basis of these results, a degradation mechanism including three potential routes is proposed: via formation of short-chain PFCAs by stepwise removal of CF2; direct mineralization to CO2 and HF; conversion to volatile fluorinated organic compounds. The results presented here demonstrate that electrochemical technique exhibits high efficiency in mineralizing PFNA and PFDA under mild conditions, and is promising for the treatment of long-chain PFCAs in wastewater. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/24164589/Highly_efficient_and_mild_electrochemical_mineralization_of_long_chain_perfluorocarboxylic_acids__C9_C10__by_Ti/SnO2_Sb_Ce_Ti/SnO2_Sb/Ce_PbO2_and_Ti/BDD_electrodes_ L2 - https://dx.doi.org/10.1021/es4034414 DB - PRIME DP - Unbound Medicine ER -