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Nanomaterials (Basel)

Title:		Porous Clay Heterostructure with Alginate Encapsulation for Toluene Removal
Author(s):		Son Y; Kim TH; Kim D; Hwang Y;
Address:		"Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea"
Journal Title:		Nanomaterials (Basel)
Year:		2021
Volume:		20210203
Issue:		2
Page Number:		-
DOI:		10.3390/nano11020388
ISSN/ISBN:		2079-4991 (Print) 2079-4991 (Electronic) 2079-4991 (Linking)
Abstract:		"A volatile organic compound adsorbent based on a porous clay heterostructure (PCH) with alginate biopolymer was successfully prepared. From N(2) adsorption-desorption analysis, the specific surface area, pore volume, and pore size of bentonite were dramatically increased after introducing the porous structure. Following complexation with alginate (Alg-PCH), the pore volume and pore size were not significantly affected by pore structure. The thermal stability of Alg-PCH shows enhanced thermal stability compared to alginate and alginate beads. The morphology layered structure of Alg-PCH was carried out by transmission electron microscopy (TEM), suggesting the disorder and re-order of the c-axis layer stacking by porous structure and complexation with alginate, respectively, which was well-matched with X-ray diffraction results. To optimize the preparation of Alg-PCH, various reaction conditions (alginate, CaCl(2) concentration, bead size, and weight ratio between alginate and PCH) were utilized. According to the toluene adsorption-desorption experiments, the preparation conditions for Alg-PCH were selected as a 2 mm extrusion tip, 0.5% of alginate, and 2% of CaCl(2) solution with a 1:50 alginate:PCH weight ratio. Additionally, it shows 61.63 mg/g adsorption capacity with around 49% desorption efficacy under atmospheric temperature and pressure"
Keywords:		adsorption-desorption bentonite porous clay heterostructure toluene volatile organic carbon;
Notes:		"PubMed-not-MEDLINESon, Yeongkyun Kim, Tae-Hyun Kim, Daekeun Hwang, Yuhoon eng 2017M1A2A2086647/National Research Foundation of Korea/ Not available/Seoul National University of Science and Technology/ Switzerland 2021/02/07 Nanomaterials (Basel). 2021 Feb 3; 11(2):388. doi: 10.3390/nano11020388"