Physi-chemical and sorption properties of biochars prepared from peanut shell using thermal pyrolysis and microwave irradiation
Physi-chemical and sorption properties of biochars prepared from peanut shell using thermal pyrolysis and microwave irradiation
复制标题
热解和微波辐射花生壳制备生物炭的物理化学和吸附性能
DOI：
10.1016/j.envpol.2017.04.067
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发表时间：
2017-08-01
影响因子：
8.9
通讯作者：
Steinberg, Christian E. W.
中科院分区：
文献类型：
--
作者：
Chu, Gang;Zhao, Jing;Steinberg, Christian E. W.
微波辐射是一种有效的加热和热解技术。比较微波炉和微波炉制备花生壳生物炭的性能。在相同的热解温度下，MW生物炭保留了更多的生物质（如其较高的产率和较高丰度的官能团所示），并且由于微孔的高丰度而具有更大的表面积。MW生物炭对卡马西平（CBZ）和双酚A（BPA）的吸附能力普遍高于FN生物炭。然而，它们的表面积归一化吸附较低，这表明内孔可能不完全可用于CBZ和BPA吸附。我们在这两种类型的生物炭中观察到了显着的自由基信号。虽然CBZ和BPA在生物炭吸附系统中没有降解，但在与其他化学品的研究中，MW生物炭用于有机污染物控制的更强自由基信号的潜在作用可能不会被忽视。(C)2017爱思唯尔有限公司版权所有
Microwave irradiation (MW) is an effective technique in heating and pyrolysis. This study compared the properties of peanut shell-biochars produced using MW and muffle furnace (FN). At the same pyrolysis temperature, MW biochars preserved more biomass (as indicated by their higher yields and higher abundance of functional groups) and possessed larger surface areas due to the high abundance of micropores. MW biochars generally exhibited higher adsorption of carbamazepine (CBZ) and bisphenol A (BPA) than FN biochars. However, their surface area-normalized sorption was lower, suggesting that the inner pores may not be fully available to CBZ and BPA sorption. We observed significant free radical signals in both types of biochars. Although CBZ and BPA did not degrade in the biochar sorption systems, the potential role of stronger free radical signals in MW biochars for organic contaminant control may not be overlooked in studies with other chemicals. (C) 2017 Elsevier Ltd. All rights reserved.