Optimized porous clay heterostructure for removal of acetaldehyde and toluene from indoor air

作     者：Pu ZHAO Lizhong ZHU 

作者机构：Department of Environmental Science Zhejiang University Hangzhou 310058 China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058 China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2016年第10卷第2期

页      面：219-228页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 

基　　金：supported by grants from the National High Technology Research and Development Program of China the Key Innovation Team for Science and Technology of Zhejiang Province 

主　　题：porous clay heterostmcture volatile organiccompounds adsorption adsorbent indoor air 

摘      要：Adsorption is the most widely used technology for the removal of indoor volatile organic compounds （VOCs）. However, existing adsorbent-based technologies are inadequate to meet the regulatory requirement, due to their limited adsorption capacity and efficiency, especially under high relative humidity （RH） conditions. In this study, a series of new porous clay heterostructure （PCH） adsorbents with various ratios ofmicropores to mesopores were synthesized, characterized and tested for the adsorp- tion of acetaldehyde and toluene. Two of them, PCH25 and PCH50, exhibited markedly improved adsorption capabil- ity, especially for hydrophilic acetaldehyde. The improved adsorption was attributed to their large micropore areas and high micropore-to-mesopore volume ratios. The amount of acetaldehyde adsorbed onto PCH25 at equilibrium reached 62.7 mg. g-l, eight times as much as the amount adsorbed onto conventional activated carbon （AC）. Even at a high RH of 80%, PCH25 removed seven and four times more of the acetaldehyde than AC and the unmodified raw PCHs did, respectively. This new PCH optimized for their high adsorption and resistance to humidity has promising applications as a cost-effective adsorbent for indoor air purification.