Influence of biochar on sorption, leaching and dissipation of bisphenol A and 17α-ethynylestradiol in soil.
Influence of biochar on sorption, leaching and dissipation of bisphenol A and 17α-ethynylestradiol in soil.
复制标题
DOI：
10.1039/c5em00190k
复制
发表时间：
2015-10
期刊：
影响因子：
--
通讯作者：
N. Xu;Bo Zhang;Guangcai Tan;Jie Li;Hongyuan Wang
中科院分区：
文献类型：
--
作者：
N. Xu;Bo Zhang;Guangcai Tan;Jie Li;Hongyuan Wang
生物炭作为一种土壤改良剂，为有机残留物的处理提供了一种经济、便捷的途径。研究了添加生物炭对双酚A（BPA）和17α-乙炔基苯酚（EE 2）在土壤中的吸附、淋溶和消散过程的影响。以玉米秸秆为原料，在500 °C下反应1.5h，制得的生物炭具有高度芳香性和微孔结构，表面含有多种官能团。在批量吸附研究中，施加4重量%的生物炭到土壤显着增加的固体-水分配系数的263%的BPA和EE 2的298%，在污染物的平衡浓度为0.01毫克L（-1）。在淋洗实验中，经过5个淋洗周期后，与无生物炭的土壤相比，添加1wt%、2wt%和4wt%生物炭的土壤对BPA的累积量减少了19%、28%和53%，对EE 2的累积量减少了42%、58%和77%。有趣的是，在90 d的培养实验中，BPA和EE 2的耗散没有受到显着的影响，而CaCl 2提取BPA和EE 2观察到显着下降。总体结果突出了这种生物炭在降低BPA和EE 2在土壤中的移动性方面的独特潜力，同时不减弱这两种污染物的降解。
Biochar, as a soil amendment, provided a very cost-effective, convenient route to dispose organic residues. In the present study, the impact of adding biochar on the sorption, leaching and dissipation processes of bisphenol A (BPA) and 17α-ethynylestradiol (EE2) in soil was investigated. The biochar derived from corn stalks at 500 °C for 1.5 h was characterized by a highly aromatic and microporous structure with various functional groups on the surface. In the batch sorption studies, the application of 4 wt% biochar to soil significantly increased the solid-water distribution coefficients by 263% for BPA and by 298% for EE2 at the pollutant equilibrium concentration of 0.01 mg L(-1). In the leaching experiment, after five leaching periods, soil amended with 1 wt%, 2 wt% and 4 wt% biochar reduced the cumulative amount by 19%, 28% and 53% for BPA, 42%, 58% and 77% for EE2 compared to the biochar-free soil. Interestingly, during the 90 d incubation experiment, BPA and EE2 dissipations were not significantly affected by the added biochar, while remarkable decreases of CaCl2 extractable BPA and EE2 were observed. The overall results highlighted the distinctive potential of this biochar in reducing the mobility of BPA and EE2 in soil, meanwhile without attenuating the degradation of the two pollutants.