甲拌磷
光降解
光催化
二氧化钛
化学
降级(电信)
动力学
辐照
色谱法
化学工程
催化作用
有机化学
计算机科学
杀虫剂
工程类
物理
核物理学
生物
电信
量子力学
农学
作者
Ren‐Jang Wu,Chiing‐Chang Chen,Chung‐Shin Lu,Peng-Yueh Hsu,Ming-Hung Chen
出处
期刊:Desalination
[Elsevier]
日期:2010-01-01
卷期号:250 (3): 869-875
被引量:64
标识
DOI:10.1016/j.desal.2009.03.026
摘要
The photocatalytic degradation of phorate in aqueous suspensions was examined with the use of titanium dioxide (TiO2) as a photocatalyst. About 99% of phorate was degraded after UV irradiation for 60 min. The photodegradation of phorate followed pseudo-first-order kinetics and parameters such as pH of the system, TiO2 dosage, and presence of anions were found to influence the reaction rate. To obtain a better understanding of the mechanistic details of this TiO2-assisted photodegradation of phorate with UV irradiation, the intermediates of the processes were separated, identified, and characterized by the solid-phase microextraction (SPME) and gas chromatography/mass spectrometry (GC/MS) techniques. The probable photodegradation pathways were proposed and discussed. To the best of our knowledge, this is the first study that reports the degradation pathways of phorate. The electrical energy consumption per order of magnitude for photocatalytic degradation of phorate was also calculated and showed that a moderated efficiency (EEO = 96 kWh/(m3 order)) was obtained in TiO2/UV process.
科研通智能强力驱动
Strongly Powered by AbleSci AI