Oh Seok-Young, Seo Yong-Deuk, Jeong Tae-Yong, Kim Sang-Don
J Environ Qual. 2018 Mar;47(2):353-360. doi: 10.2134/jeq2017.09.0357.
Factors affecting the sorptive removal of nitro explosives (2,4,6-trinitrotoluene [TNT] and hexahydro-1,3,5-trinitro-1,3,5-triazine [RDX]) to polymer/biomass-derived biochar were investigated through batch experiments. Compared with that of rice ( L.) straw (RS)-derived biochar, the sorption of TNT and RDX to polymer/RS-derived biochar was greatly enhanced by >2.5 and 4 times, respectively. The type and amount of polymer did not significantly affect the sorption of nitro explosives to polymer/RS-derived biochar. Pyrolysis temperature did not affect the sorption capacity. Surface treatment with acid or an oxidant did not significantly change the sorption capacity, suggesting that polymer residues may be strongly responsible for the enhancement. Possible polymer residues were identified via gas chromatography mass spectrometry analysis. The toxicity characteristic leaching procedure and Microtox bioassay analyses indicated that polymer/RS-derived biochar did not show possible harmful effects. Our results suggest that polymer/RS-derived biochar can be effectively used as a sorbent to remove nitro explosives both in the natural environment and engineered systems.
通过批量实验研究了影响聚合物/生物质衍生生物炭对硝基炸药（2,4,6-三硝基甲苯[TNT]和六氢-1,3,5-三硝基-1,3,5-三嗪[RDX]）吸附去除的因素。与水稻（L.）秸秆（RS）衍生的生物炭相比，TNT和RDX对聚合物/RS衍生生物炭的吸附分别显著增强了2.5倍和4倍以上。聚合物的类型和用量对硝基炸药对聚合物/RS衍生生物炭的吸附没有显著影响。热解温度不影响吸附容量。用酸或氧化剂进行表面处理并没有显著改变吸附容量，这表明聚合物残留物可能是吸附增强的主要原因。通过气相色谱-质谱分析鉴定了可能的聚合物残留物。毒性特征浸出程序和Microtox生物测定分析表明，聚合物/RS衍生生物炭没有显示出可能的有害影响。我们的结果表明，聚合物/RS衍生生物炭可以有效地用作吸附剂，在自然环境和工程系统中去除硝基炸药。
