Insight into the binding properties of carbamazepine onto dissolved organic matter using spectroscopic techniques during grassy swale treatment.
Insight into the binding properties of carbamazepine onto dissolved organic matter using spectroscopic techniques during grassy swale treatment.
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DOI：
10.1016/j.ecoenv.2019.02.059
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发表时间：
2019-05
影响因子：
6.8
通讯作者：
Dong-hai Yuan;Haotian Wang;Yechen An;Xujing Guo;Liansheng He
中科院分区：
文献类型：
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作者：
Dong-hai Yuan;Haotian Wang;Yechen An;Xujing Guo;Liansheng He
卡马西平（Carbamazepine，CBZ）是一种世界性的抗癫痫药物，与溶解性有机物（dissolvedorganicmatter，DOM）接触后，其转归和迁移受到很大影响。草坡处理能显著改变道路径流中DOM的性质，从而影响CBZ与DOM的络合作用。利用光谱技术研究了CBZ与DOM之间的不同结合特性，并对CBZ的迁移和土壤地球化学进行了研究。二维相关光谱（2D-COS）结果表明，出水DOM与CBZ的结合位点比进水DOM多，GS处理对CBZ与DOM荧光团的结合顺序有较大影响。结果还表明，蛋白质类物质表现出更高的log Km值比其他荧光组分，表明荧光蛋白质类物质在CBZ的生物地球化学行为中起着至关重要的作用。GS处理后，对数值Km值显著增加。GS处理还可以去除大部分荧光DOM，降低CBZ在水环境中的风险。
Carbamazepine (CBZ) is a worldwide anti-epileptic drug, whose fate and migration can be greatly influenced by contact with dissolved organic matter (DOM). The properties of DOM in road runoff can be greatly changed by grassy swale (GS) treatment, which influences the complexation of CBZ with DOM. Spectroscopic techniques were employed to explore the different binding properties between CBZ and DOM, and to understand the migration and biogeochemistry of CBZ. The two-dimensional correlation spectroscopy (2D-COS)demonstrated that effluent DOM displayed more binding sites for CBZ than influent DOM, and the binding sequencing of CBZ with DOM fluorophores can be greatly influenced by GS treatment. The results also suggest that protein-like materials exhibit higher log KMvalues than other fluorescent components, indicating that fluorescent protein-like materials play a crucial role in the biogeochemical behavior of CBZ. Meanwhile, the log KMvalues showed a remarkable increase after GS treatment. GS treatment can also remove most fluorescent DOM, reducing the risk of CBZ in the water environment.