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J Hazard Mater

Title:		Impact of styrenic polymer one-step hyper-cross-linking on volatile organic compound adsorption and desorption performance
Author(s):		Ghafari M; Atkinson JD;
Address:		"Department of Civil, Structural, and Environmental Engineering, State University of New York at Buffalo, NY 14260, United States. Department of Civil, Structural, and Environmental Engineering, State University of New York at Buffalo, NY 14260, United States. Electronic address: AtkJDW@buffalo.edu"
Journal Title:		J Hazard Mater
Year:		2018
Volume:		20180227
Issue:
Page Number:		117 - 123
DOI:		10.1016/j.jhazmat.2018.02.051
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"A novel one-step hyper-cross-linking method, using 1,2-dichloroethane (DCE) and 1,6-dichlorohexane (DCH) cross-linkers, expands the micropore volume of commercial styrenic polymers. Performance of virgin and modified polymers was evaluated by measuring hexane, toluene, and methyl-ethyl-ketone (MEK) adsorption capacity, adsorption/desorption kinetics, and desorption efficiency. Hyper-cross-linked polymers have up to 128% higher adsorption capacity than virgin polymers at P/P(0)?ª+=?ª+0.05 due to micropore volume increases up to 330%. Improvements are most pronounced with the DCE cross-linker. Hyper-cross-linking has minimal impact on hexane adsorption kinetics, but adsorption rates for toluene and MEK decrease by 6-41%. Desorption rates decreased (3-36%) for all materials after hyper-cross-linking, with larger decreases for DCE hyper-cross-linked polymers due to smaller average pore widths. For room temperature desorption, 20-220% more adsorbate remains in hyper-cross-linked polymers after regeneration compared to virgin materials. DCE hyper-cross-linked polymers have 13-92% more residual adsorbate than DCH counterparts. Higher temperatures were required for DCE hyper-cross-linked polymers to completely desorb VOCs compared to the DCH hyper-cross-linked and virgin counterparts. Results show that the one-step hyper-cross-linking method for modifying styrenic polymers improves adsorption capacity because of added micropores, but decreases adsorption/desorption kinetics and desorption efficiency for large VOCs due to a decrease in average pore width"
Keywords:		Desorption efficiency Hyper-cross-linking Sorption kinetics Styrenic porous polymers VOC adsorption;
Notes:		"PubMed-not-MEDLINEGhafari, Mohsen Atkinson, John D eng Netherlands 2018/03/12 J Hazard Mater. 2018 Jun 5; 351:117-123. doi: 10.1016/j.jhazmat.2018.02.051. Epub 2018 Feb 27"