Fate and Transport of Pharmaceuticals in Iron and Manganese Binary Oxide Coated Sand Columns

Tao Luo; Rasesh Pokharel; Tao Chen

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Fate and Transport of Pharmaceuticals in Iron and Manganese Binary Oxide Coated Sand Columns

机译：Fate and Transport of Pharmaceuticals in Iron and Manganese Binary Oxide Coated Sand Columns

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Predicting the fate and transport of pharmaceuticals in terrestrial environments requires knowledge of their interactions with complex mineral assemblages. To advance knowledge along this front, we examined the reactivity of pipemidic acid (PIP), a typical quinolone antibiotic, with quartz particles coated with a mixture of manganese oxide (Mn02) and goethite (a-FeOOH) under static and dynamic flow conditions. Batch and dynamic column experiments showed that PIP binding to Mn02 proceeded through a heterogeneous redox reaction, while binding to goethite was not redox-reactive. Mixed columns of aggregated goethite-manganese particles however enhanced redox reactivity because (i) goethite facilitated the transport of dissolved Mn(ll) ion and increased the retention of PIP oxidation products, and (ii) Mn02 was protected from passivation. This mobility behavior was predicted using transport models accounting for adsorption and transformation kinetics of PIP on both goethite and Mn02. This work sheds new light on reactivity changes of mixtures of Fe and Mn oxides under flow-through conditions and will have important implications in predicting the fate and transport of redox-active organic compounds as well as development of new geomedia filters for environmental remediation.

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《Environmental Science & Technology: ES&T》 |2023年第1期|214-221|共8页
作者
Tao Luo; Rasesh Pokharel; Tao Chen;
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作者单位

Universite de Rennes, Ecole Nationale Superieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, F-3S000 Rennes, France;

Department of Earth Sciences, Copernicus Institute of Sustainable Development, Faculty of Geosciences, Utrecht University, 3S84 CB Utrecht, Netherlands;

Universite de Rennes, Ecole Nationale Superieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, F-3S000 Rennes, France;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
pharmaceuticals; goethite; manganese oxide; redox; geomedia filter; transport; modeling;

Fate and Transport of Pharmaceuticals in Iron and Manganese Binary Oxide Coated Sand Columns

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