水中磺胺二甲基嘧啶的辐照降解研究

发布时间：2018-03-06 16:15

本文选题：辐照　切入点：磺胺二甲基嘧啶(SMT)　出处：《中国环境科学》2017年01期 　论文类型：期刊论文

【摘要】：以典型磺胺类抗生素磺胺二甲基嘧啶(SMT)为研究对象,利用电离辐照技术对其进行降解,去除效果良好,采用理论分析与实验验证相结合的方法,揭示了SMT辐照降解特性.通过色谱和化学分析原理,探讨了辐照降解中间产物及其变化规律.进行了污染物初始浓度,初始pH值,气体曝气及自由基消除剂等影响因素实验,分析各因素下SMT降解规律和特性.结果显示,较低的污染物浓度,偏中性的环境,较高的溶解氧含量有利于污染物的降解和矿化.自由基消除剂的加入可极大抑制反应进行,揭示了在SMT辐照降解过程中·OH发挥主导作用,正丁醇的抑制效果远好于HCO_3-.在实际水处理中,通过适当调整溶液浓度,调节pH值,增加曝气量可有效提高磺胺类抗生素的辐照降解效率.
[Abstract]:The typical sulfanilamide antibiotic sulfamethylpyrimidine (SMTT) was used to degrade it by ionizing irradiation, and the removal effect was good. The method of combining theoretical analysis with experimental verification was used to study the degradation of sulfadimethylpyrimidine (SMTT). The characteristics of irradiation degradation of SMT were revealed. By means of chromatographic and chemical analysis, the intermediate products of irradiation degradation and their changing rules were discussed. The influence factors such as initial concentration of pollutants, initial pH value, gas aeration and radical scavenger were tested. The results showed that low pollutant concentration, neutral environment and high dissolved oxygen content were beneficial to the degradation and mineralization of SMT. The addition of free radical scavenger could greatly inhibit the reaction. It is revealed that 路OH plays a leading role in the degradation of SMT by irradiation, and the inhibition effect of n-butanol is much better than that of HCO _ 3-. in actual water treatment, the pH value is adjusted by adjusting the concentration of solution. The irradiation degradation efficiency of sulfanilamide antibiotics can be improved by increasing aeration rate.
【作者单位】：北京工业大学建筑工程学院;清华大学核能与新能源技术研究院环境技术研究室;
【基金】：国家自然科学基金青年科学基金(51508007) 北京市博士后基金(2015ZZ-07)
【分类号】：X703

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