采用不同热解温度制备的生物炭从土壤洗涤废水中选择性去除多环芳烃（PAHs）。
Selective removal of polycyclic aromatic hydrocarbons (PAHs) from soil washing effluents using biochars produced at different pyrolytic temperatures.
机构信息
School of Resources and Environment, University of Jinan, Jinan 250022, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
School of Resources and Environment, University of Jinan, Jinan 250022, China.
出版信息
Bioresour Technol. 2014 Jul;163:193-8. doi: 10.1016/j.biortech.2014.04.042. Epub 2014 Apr 19.
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.
用在 400、600 和 800°C 下制备的麦秆生物炭（BC400、BC600 和 BC800）从土壤洗脱废水中选择性吸附多环芳烃（PAHs）。对于含有菲（PHE）、荧蒽（FLU）、芘（PYR）和 Triton X-100（TX100）的土壤洗脱废水，2 g L(-1)（BC800）或 6 g L(-1)（BC400 和 BC600）的生物炭可以去除 71.8-98.6%的 PAHs，同时回收超过 87%的 TX100。PAH 的去除率随生物炭剂量的增加而增加。然而，过量的生物炭不利于表面活性剂的回收。对于特定的生物炭剂量，PAH 的去除和 TX100 的损失随热解温度的升高而增加。对于 BC400 和 BC600，PAH 的去除顺序为 PHE>FLU>PYR，而对于 BC800，顺序为 PYR>FLU>PHE。生物炭对 PAHs 的吸附亲和力远高于 TX100。因此，生物炭是土壤洗脱过程中选择性吸附 PAHs 和回收 TX100 的一种较好的替代品。
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