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Số người truy cập: 108,310,006

 Degradation of chlothianidin from Dantutso 50WG in electrochemical process: Kinetics and role of reactive species
Tác giả hoặc Nhóm tác giả: Nguyen Tien Hoang
Nơi đăng: Tạp chí Đại học Đà Nẵng; Số: VOL. 20, NO. 6.1;Từ->đến trang: 35-40;Năm: 2022
Lĩnh vực: Chưa xác định; Loại: Bài báo khoa học; Thể loại: Trong nước
TÓM TẮT
The kinetic degradation of clothianidin (CLO)(in Dantuso 50 WG) during electrochemical oxidation (EO) process using sulfate-and chloride-supporting electrolytes was comprehensively investigated. The degradation of CLO was not due to direct electron oxidation, but was mainly due to• OH and other radicals generated from supporting electrolytes. The degradation of CLO was significantly inhibited when increasing the concentration of nitrobenzene (NB), methanol (MeOH) and benzoic acid (BA). The second-order rate constant of• OH toward CLO was determined to be 3.23× 109 M-1 s-1 using competition kinetics method. When SO4 2-and Cl-were used as supporting electrolytes, the degradation of CLO by• OH was the same with kCLO= 0.0084 min-1. Meanwhile, the higher removal of CLO in SO4 2--supporting electrolyte was due to the contribution of (SO4•-/S2O8 2-) more than that of (Cl•/HClO/ClO-).
ABSTRACT
The kinetic degradation of clothianidin (CLO)(in Dantuso 50 WG) during electrochemical oxidation (EO) process using sulfate-and chloride-supporting electrolytes was comprehensively investigated. The degradation of CLO was not due to direct electron oxidation, but was mainly due to• OH and other radicals generated from supporting electrolytes. The degradation of CLO was significantly inhibited when increasing the concentration of nitrobenzene (NB), methanol (MeOH) and benzoic acid (BA). The second-order rate constant of• OH toward CLO was determined to be 3.23× 109 M-1 s-1 using competition kinetics method. When SO4 2-and Cl-were used as supporting electrolytes, the degradation of CLO by• OH was the same with kCLO= 0.0084 min-1. Meanwhile, the higher removal of CLO in SO4 2--supporting electrolyte was due to the contribution of (SO4•-/S2O8 2-) more than that of (Cl•/HClO/ClO-).
[ 2022\2022m07d016_10_43_567654-Van_ban_cua_bai_bao-10208-1-10-20220701.pdf ]
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