AI Article Synopsis
- Black carbon (BC) shows promise in managing hydrophobic organic contaminants in sediments due to its high ability to absorb them.
- The study examined how pentachlorophenol (PCP) is absorbed in sediments enhanced with rice straw biochar (RC) and fly ash (FC) over different aging times and temperatures.
- Results indicated that PCP absorption increased with more BC and decreased with longer aging and higher temperatures, with RC consistently outperforming FC in sorption capacity.
Article Abstract
Black carbon (BC) is a potential material for controlling hydrophobic organic contaminants in sediment because it has a high sorption capacity. In the present study, the sorption of pentachlorophenol (PCP) onto sediments supplemented with rice straw biochar (RC) and fly ash (FC) aged for different times and at temperatures were investigated. The sorption of PCP increased with increasing amounts of BC and decreased with aging time and storage temperature of the BC-supplemented sediments. The sorption of PCP onto RC-supplemented sediments was higher than those supplemented with FC regardless of whether or not BCs were aged in sediments. For aged sediments containing 2% BCs, the sorption capacity was 9.15- and 2.87-fold higher than that of FC when supplemented with RC aged at 25 and 45°C, respectively. Therefore, biochar is better than fly ash for controlling organic pollutants even when the RC was present in sediment for a long time.
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| http://dx.doi.org/10.1016/j.biortech.2012.02.058 | DOI Listing |
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