聚合物基离子液体掺杂nZVI柱撑层状钛酸盐制备及其快速富集和降解水中TBBPA的研究：吸附形态及还原途径

项目名称： 聚合物基离子液体掺杂nZVI柱撑层状钛酸盐制备及其快速富集和降解水中TBBPA的研究：吸附形态及还原途径

项目编号： No.21304040

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 张云

作者单位： 兰州大学

项目金额： 25万元

中文摘要： 四溴双酚A（TBBPA）是潜在的内分泌干扰物，由于其可能引起生态安全问题而备受关注。研究表明，离子液体[C6MIM][PF6]可以快速富集水中痕量TBBPA，但是通过何种作用机制尚不清楚，而TBBPA的富集形态对降解途径有重要的影响。另一方面，虽然环境技术中常用的纳米Fe0(nZVI)可降解水中有机污染物，但低分散性与活性可利用性是阻碍其应用的关键问题。本课题组拟结合敏感吸附组元与高效降解组元，制备聚合物基[C6MIM][PF6]掺杂nZVI柱撑层状钛酸盐复合微球，初步探讨以敏感吸附促进的TBBPA高效还原机理，而这一机制目前尚无报道。我们推测在层状钛酸盐上沉降nZVI可有效改善其分散性从而提高活性点位，为证实该假说，本研究将利用分光光度计结合红外光谱分析TBBPA在[C6MIM][PF6]上的吸附形态，初步探讨其降解途径，为水溶液中微量有机污染物的去除提供新思路。

中文关键词： TBBPA；Fe0；生物传感器；自激活催化剂；重金属

英文摘要： Tetrabromobisphenol A (TBBPA) is one of the most widely used brominated flame retardant around the world. TBBPA is of high concern since it is a toxic and persistent compound which can be an endocrine disruptor. Therefore, it is necessary and significant to develop effective techniques to remove TBBPA from the contaminated environment. Owing to the lipophilicity, Low concentrations of TBBPA in real water samples make direct determination and treatment difficult. It was reported that Ionic liquid [C6MIM][PF6] could enrich TBBPA rapidly from real water samples. However, the combination mechanism between existing species of TBBPA and ionic liquid is still unknown. Moreover, the extracted species may affect the degradation pathways of TBBPA significantly. On the other hand, it is well known that nano Zero valent iron (nZVI) can drive reduction of many contaminants in the environment, such as chlorinated organics. The reactivity of the Fe0/Fe2+, with a standard potential of -0.447 V, has been attributed to its ability to drive reduction of chlorinated organics. However, the poor dispersion and reactivity available in aqueous environment could be one of critical points which hinder the application of nZVI as an effective technology for treatment. Therefore, our research group intends to combine the units of sensitive

英文关键词： TBBPA；Fe0；biosensor；self-activated nanocatalyst；heavy metal