期刊论文

中文

环境工程学报

1673-9108

2015

9

1

73-78

11475080:国家自然科学基金 11175081:国家自然科学基金 13K085:创新基金

本校为第一机构

研究了~(60)Co γ-射线辐照条件下水中阿莫西林(AMX)的辐照降解,考察了AMX初始浓度、辐照剂量、pH、H_2O_2、自由基消除剂(碳酸氢钠和正丁醇)以及溶解氧等因素对AMX辐照降解的影响。结果表明,γ辐照可有效降解水中AMX,当AMX初始浓度为10.0 mg/L,辐照剂量为15 kGy时,降解率达100%,随着AMX浓度增大,其降解率降低。碱性条件有利于AMX的降解,当pH为11,且辐照剂量大于10 kGy时,AMX的降解率在90%以上。同时,加入H_2O_2可以促进AMX的降解;·OH自由基消除剂的存在和缺氧条件会明显抑制 γ-射线对AMX的辐照降解,分析表明,AMX的降解主要是基于·OH自由基的氧化。

Degradation of amoxicillin (AMX) in aqueous solution by 60Co gamma-ray irradiation was examined, and the influences of initial concentration of AMX, absorbed dose, pH value of solution, hydrogen peroxide (H2O2), ·OH radical scavengers (sodium bicarbonate and n-butanol) and dissolved oxygen, etc., were investigated. Experimental results show that AMX in aqueous solution can be effectively degraded by gamma-ray irradiation. The degradation efficiency of AMX was close to 100% at an absorbed dose of 15 kGy, and degradation rate of AMX significantl...