摘要
在铁(III)-草酸盐配合物体系中考察pH值,铁(III)/草酸盐(Fe(III)/Ox)配比,酞酸二丁酯(DBP)初始浓度对DBP光降解的影响,结果表明pH=3.5和Fe(III)/Ox配比为10.0/120.0 μmol/L时具有较强的氧化能力,其光解反应符合表观一级反应动力学规律。并且利用气相色谱-质谱联机分析确定DBP光降解得中间产物,揭示DBP光降解的主要反应途径是OH自由基提取烷基上与羧基相连的α-H,生成醇(ROH),再分解成为酞酸和二醇,进一步氧化脱羧,直至矿化。
s: The effect of pH of solution, Fe(III) and oxalate concentration, initial concentration of DBP on the photodegradation of DBP were investigated in the Fe(III)-oxalate complexes system. The results showed that the higher efficiency was achieved under the conditions of pH 3.5 and Fe(III)/oxalate ratio 10.0/120μmol/L, the photodegradation reaction obeyed the law of apparent first-order dynamics reaction. By using GC-MS to analyze the intermediate substances from photodegradation of DBP, the predominant reaction pathway for DBP photodegradation is that free hydroxyl radical extracts H atom in α-position of the aliphatic chain close to the carboxyl group followed by oxidation to produce alcoholized derivatives ROH, then breaks down to phthalic acid and dialcohol that is further oxidized up to mineralization.
出处
《水处理技术》
CAS
CSCD
北大核心
2005年第3期39-42,共4页
Technology of Water Treatment
基金
国家自然科学研究基金(20177017)。
