Department of Soil, Water & Climate, University of Minnesota , 1991 Upper Buford Circle, St. Paul, Minnesota 55108, United States.
J Agric Food Chem. 2014 Nov 12;62(45):10855-60. doi: 10.1021/jf5034398. Epub 2014 Nov 3.
Sorption of four herbicides and a metabolite of indaziflam on a fresh macadamia nut biochar and biochars aged one or two years in soil was characterized. On fresh biochar, the sorption was terbuthylazine (Kd = 595) > indaziflam (Kd = 162) > MCPA (Kd = 7.5) > fluoroethyldiaminotriazine (Kd = 0.26) and nicosulfuron (Kd = 0). Biochar surface area increased with aging attributed to the loss of a surface film. This was also manifested in a decline in water extractable organic carbon with aging. Correspondingly, an increase in the aromaticity was observed. The higher surface area and porosity in aged biochar increased sorption of indaziflam (KdBC-2yr = 237) and fluoroethyldiaminotriazine (KdBC-1yr = 1.2 and KdBC-2yr = 3.0), but interestingly decreased sorption of terbuthylazine (KdBC-1yr = 312 and KdBC-2yr = 221) and MCPA (KdBC-1yr = 2 and KdBC-2yr = 2). These results will facilitate development of biochars for specific remediation purposes.
研究了新鲜澳洲坚果生物炭和在土壤中老化 1 年和 2 年的生物炭对 4 种除草剂和咪草烟代谢物的吸附特性。在新鲜生物炭上，吸附顺序为特丁津（Kd = 595）>咪草烟（Kd = 162）>MCPA（Kd = 7.5）>氟乙二胺三嗪（Kd = 0.26）和烟嘧磺隆（Kd = 0）。生物炭表面面积随老化而增加，这归因于表面膜的损失。这也表现在随老化水可提取有机碳的减少。相应地，观察到芳香度增加。老化生物炭的较高表面积和孔隙率增加了咪草烟（KdBC-2yr = 237）和氟乙二胺三嗪（KdBC-1yr = 1.2 和 KdBC-2yr = 3.0）的吸附，但有趣的是，特丁津（KdBC-1yr = 312 和 KdBC-2yr = 221）和 MCPA（KdBC-1yr = 2 和 KdBC-2yr = 2）的吸附减少。这些结果将有助于为特定修复目的开发生物炭。
