ArticleEnvironmental science & technology2025
Hydrophilic Organic Compound Migration in Biochar-Amended Stormwater Filters with Dynamic Conditions and Varied Background Dissolved Organic Carbon Contents.
Article in Environmental science & technology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Urban stormwater runoff carries dissolved, hydrophilic urban pollutants into surface waters and aquifers, impairing human and aquatic health and threatening beneficial stormwater uses, such as augmentation of drinking water supplies. Black carbon-amended stormwater filters have been shown to remove dissolved metal and organic contaminants from urban stormwater runoff, and 1-dimensional intraparticle pore diffusion limited-sorption models have been validated for predicting filter performance under constant flow and influent conditions. However, as stormwater runoff is quite variable, it is important to understand how dynamic conditions and varied background dissolved organic carbon (DOC) affect the filter performance. This study investigates how dynamic flow and influent contaminant loading and variable background DOC conditions affect compound migration and transport modeling in biochar-amended stormwater filters through a series of four column experiments. Dynamic flow and influent contaminant loading conditions substantially affect contaminant migration, which is predicted by using a previously validated transport model with previously determined sorption and apparent intraparticle tortuosity parameters. Increased background DOC (from 3 mg C L
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