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Số người truy cập: 108,310,843

 Effect of the chloride ion on the degradation of PPCPs in UV/persulfate and UV/H2O2 and the role of radicals in these systems
Tác giả hoặc Nhóm tác giả: Nguyen Tien Hoang*, Tran Duc Manh, NC Thuy Tram, Bui Dinh Nhi, Fredrick M Mwazighe, Dinh Van Tac, Vu Thi Duyen, Y Hoang Hien, Nguyen Thi Thy Nga, Doan Van Duong, Lan Tran Thi, Thi Van Doan
Nơi đăng: Journal of Environmental Chemical Engineering; Số: 111846;Từ->đến trang: 111846;Năm: 2024
Lĩnh vực: Khoa học; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
This work comprehensively studied the kinetic degradation of ciprofloxacin (CIP), levofloxacin (LEV), and sulfanilamide (SAA) by UV/PS/Cl and UV/H2O2/Cl. UV contributed to the degradation of SAA to a great extent, resulting in the highest degradation, compared with the other PPCPs. 10 mM of Cl- slightly enhanced the degradation of LEV and SAA, while higher concentrations of Cl- (up to 1000 mM) inhibited the degradation of all the PPCPs in most processes. Increasing the concentration of Cl- to 1000 mM resulted in the decrease in the concentrations of •OH (which decreased by 88 – 96%) and SO4•- (which decreased by 67.4%) in UV/PS/Cl. With the increase in the concentration of Cl- to 1000 mM, the contributions of •OH and SO4•- to the degradation of the PPCPs were almost completely masked by the contribution of Cl• (except in the case of SAA). The relationship between the natural logarithms of the …
ABSTRACT
This work comprehensively studied the kinetic degradation of ciprofloxacin (CIP), levofloxacin (LEV), and sulfanilamide (SAA) by UV/PS/Cl and UV/H2O2/Cl. UV contributed to the degradation of SAA to a great extent, resulting in the highest degradation, compared with the other PPCPs. 10 mM of Cl- slightly enhanced the degradation of LEV and SAA, while higher concentrations of Cl- (up to 1000 mM) inhibited the degradation of all the PPCPs in most processes. Increasing the concentration of Cl- to 1000 mM resulted in the decrease in the concentrations of •OH (which decreased by 88 – 96%) and SO4•- (which decreased by 67.4%) in UV/PS/Cl. With the increase in the concentration of Cl- to 1000 mM, the contributions of •OH and SO4•- to the degradation of the PPCPs were almost completely masked by the contribution of Cl• (except in the case of SAA). The relationship between the natural logarithms of the …
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