生物质炭的制备、改性以及在挥发性有机物吸附方面的应用

Preparation and Modification of Biochars and Its Application in VOCs Adsorption

挥发性有机物(VOCs)是大气中重要的污染源之一,对环境和人类健康产生严重的危害。吸附法是工业中最常用的去除VOCs的方法,吸附剂是吸附技术的关键。生物质炭是一种由生物质基材料在高温下热解活化等工艺制得的炭材料,具有较高的比表面积、丰富的孔隙结构和化学活性表面,在环境污染控制领域具有广泛应用。本文主要介绍了常用于去除VOCs的生物质炭的制备和改性方法,以及生物质炭在吸附VOCs的应用研究;评估了生物质炭去除VOCs的能力,特别是经过各种改性和活化工艺后,评价生物质炭作为吸附剂去除VOCs的适用性;确定改性和活化后对VOCs吸附能力的影响;揭示生物质炭对VOCs可能存在的吸附机理;最后,对生物质炭的再生提出了建议和展望。

Volatile organic compounds(VOCs)are one of the important pollution sources in the atmosphere,which can cause serious harm to the environment and human health.Adsorption method is the most commonly used method for removing VOCs in industry,and adsorbent is the key to adsorption technology.Biochar is a carbon material prepared by processes such as pyrolysis and activation of biomass based materials at high temperatures.It has a high specific surface area,rich pore structure,and chemically active surface,and is widely used in the field of environmental pollution control.Based on recent research,this article systematically reviews and summarizes the preparation and modification methods of biochar commonly used for removing VOCs,as well as the application research of biochar in adsorbing VOCs.The primary objective of this article is to evaluate the ability of biochar to remove VOCs,especially after various modification and activation processes,to evaluate the applicability of biochar as an adsorbent for removing VOCs;Determine the impact of modification and activation on the adsorption capacity of VOCs;Reveal the possible adsorption mechanism of biomass charcoal on VOCs.Finally,the article also puts forward suggestions and prospects for the regeneration of biomass charcoal.