Selective removal of polycyclic aromatic hydrocarbons (PAHs) from soil washing effluents using biochars produced at different pyrolytic temperatures

文献类型： 外文期刊

第一作者： Li, Helian

作者： Li, Helian;Qu, Ronghui;Li, Chao;Guo, Weilin;Han, Xuemei;He, Fang;Ma, Yibing;Li, Helian;Xing, Baoshan;Ma, Yibing

作者机构：

关键词： Biochar;Selective adsorption;PAHs;Soil washing effluents;Surfactant recovery

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Wheat straw biochars produced at 400, 600 and 800 °C (BC400, BC600 and BC800) were used to selectively adsorb PAHs from soil washing effluents. For soil washing effluents contained Phenanthrene (PHE), Fluoranthene (FLU), Pyrene (PYR) and Triton X-100 (TX100), biochars at 2 (for BC800) or 6 g L~(-1) (for BC400 and BC600) can remove 71.8-98.6% of PAHs while recover more than 87% of TX100. PAH removals increase with increasing biochar dose. However, excess biochar is detrimental to the recovery of surfactant. For a specific biochar dose, PAH removal and TX100 loss increase with increasing pyrolytic temperature. For BC400 and BC600, PAH removal follows the order of PHE > FLU > PYR, while the order is reversed with PYR > FLU > PHE for BC800. Biochars have much higher sorption affinity for PAHs than for TX100. It is therefore suggested that biochar is a good alternative for selective adsorption of PAHs and recovery of TX100 in soil washing process.

分类号： Q

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