化学
卤化物
臭氧
溴化物
降级(电信)
毒性
无机化学
矿化(土壤科学)
动力学
环境化学
氯化物
激进的
羟基自由基
卤素
分解
有机化学
烷基
氮气
物理
电信
量子力学
计算机科学
作者
Ranyun Xu,Hang Ren,Tongtong Chi,Yuhan Zheng,Yawei Xie,Jinping Tian,Lyujun Chen
出处
期刊:Chemosphere
[Elsevier]
日期:2022-02-01
卷期号:288: 132343-132343
被引量:14
标识
DOI:10.1016/j.chemosphere.2021.132343
摘要
2,4,6-Trichlorophenol (2,4,6-TCP) is extensively consumed in industrial production and may cause environmental damages. The effect of halide ions on the decomposition of 2,4,6-TCP has often been overlooked. In this study, the bromide ion was found to have a stronger negative impact on 2,4,6-TCP degradation than chloride ion in the O3 system, and led to the formation of adsorbable organic halogens (AOX). Kinetic modeling demonstrated that the concentration of various radicals was largely depended on the solution pH, and stronger basicity not only contributed to the mineralization of 2,4,6-TCP, but also inhibited the formation of halogenated by-products. Combining the intermediate identification and quantum chemical calculation, the degradation pathways of 2,4,6-TCP during ozone oxidation process were proposed. The toxicity test and ECOSAR simulation demonstrated that the acute toxicity of some 2,4,6-TCP degradation intermediates was relatively higher than their parent compound. With high concentrations of halide ions, the ozone-treated solution showed greater toxicity than the originator 2,4,6-TCP solution. These results illustrate that the ozone treatment of the halide-containing wastewater may cause potential ecological hazards and its application needs to be more cautious.
科研通智能强力驱动
Strongly Powered by AbleSci AI