Inhibitory effect of salinity on the photocatalytic degradation of three sulfonamide antibiotics

被引：61

作者：

Yang, Chun-Chen ^{[1
]}

Huang, Cheng-Liang ^{[2
]}

Cheng, Ta-Chih ^{[3
]}

Lai, Hong-Thih ^{[1
]}

机构：

[1] Natl Chiayi Univ, Dept Aquat Biosci, Chiayi 60004, Taiwan

[2] Natl Chiayi Univ, Dept Appl Chem, Chiayi 60004, Taiwan

[3] Natl Pingtung Univ Sci & Technol, Dept Trop Agr & Int Cooperat, Neipu 912, Pingtung, Taiwan

来源：

INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 2015年 / 102卷

关键词：

Sulfonamides; Photocatalyst; TiO2; UV; Salinity; Seawater; WATER-TREATMENT; AQUEOUS SUSPENSION; MASS-SPECTROMETRY; OXOLINIC ACID; FATE; SULFAMETHOXAZOLE; KINETICS; TIO2; PHARMACEUTICALS; TRIMETHOPRIM;

D O I：

10.1016/j.ibiod.2015.01.015

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

This study investigates the effects of two salinity treatments (20 parts per thousand and 34 parts per thousand) with seawater on the photocatalytic degradation of sulfonamide antibiotics (SAs). Three SAs, sulfamethoxazole (SMX), sulfamonomethoxine (SMM), and sulfadimethoxine (SDM), were respectively added (50 mg L-1) to saline water containing 100 mg L-1 of TiO2, and irradiated with ultraviolet (UV) light. The results revealed that the photocatalytic degradation and mineralization of the SAs decreased with an increasing level of salinity treatments. The residual concentrations of the chemical oxygen demand (COD) and dissolved organic carbon (DOC) in the solutions also revealed that SA mineralization decreased with the salinity treatments. The toxicity of the SA solutions to the bioluminescent bacteria, Vibrio fischeri, in the photocatalytic processes increased with the irradiation times, but decreased with an increasing level of salinity treatments. Further study indicated that the inhibitory effects of cations in seawater were Ca2+ > Mg2+ > K+ > Na+, whereas for anions they were I- > SO42- > Cl- > Br-. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：116 / 125

页数：10

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