Electrochemical Oxidation of Atrazine and Clothianidin on Bi-doped SnO 2 -Ti n O 2 n-1 Electrocatalytic Reactive Electrochemical Membranes

• Published in: Environmental science & technology 2018-11, Vol.52 (21), p.12675-12684
• Main Authors: Gayen, Pralay, Chen, Chen, Abiade, Jeremiah T, Chaplin, Brian P
• Format: Article
• Language: English
• ISSN: 0013-936X; 1520-5851
• DOI: 10.1021/acs.est.8b04103

This research focused on improving mineralization rates during the advanced electrochemical oxidation treatment of agricultural water contaminants. For the first time, bismuth-doped tin oxide (BDTO) catalysts were deposited on Magnéli phase (Ti O , n = 4-6) reactive electrochemical membranes (REMs). Terephthalic acid (TA) was used as a OH probe, whereas atrazine (ATZ) and clothianidin (CDN) were chosen as model agricultural water contaminants. The BDTO-deposited REMs (REM/BDTO) showed higher compound removal than the REM, due to enhanced OH production. At 3.5 V/SHE, complete mineralization of TA, ATZ, and CDN was achieved for the REM/BDTO upon a single pass in the reactor (residence time ∼3.6 s). Energy consumption for REM/BDTO was as much as 31-fold lower than the REM, with minimal values per log removal of