The Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China.
Bioresour Technol. 2012 May;112:61-6. doi: 10.1016/j.biortech.2012.02.058. Epub 2012 Feb 21.
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.
黑碳（BC）是一种控制沉积物中疏水性有机污染物的潜在材料，因为它具有很高的吸附能力。本研究考察了不同老化时间和温度下，向添加稻草生物炭（RC）和粉煤灰（FC）的沉积物中添加五氯苯酚（PCP）的吸附情况。随着 BC 量的增加，PCP 的吸附量增加，而随着 BC 补充沉积物的老化时间和储存温度的增加，PCP 的吸附量减少。添加 RC 的沉积物的 PCP 吸附量高于添加 FC 的沉积物，无论 BC 是否在沉积物中老化。对于含有 2% BC 的老化沉积物，当添加在 25 和 45°C 下老化的 RC 时，吸附能力分别比添加 FC 时高 9.15 倍和 2.87 倍。因此，即使 RC 在沉积物中存在很长时间，生物炭也优于粉煤灰来控制有机污染物。
