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Environ Res

Title:		Adsorption properties of advanced functional materials against gaseous formaldehyde
Author(s):		Vikrant K; Cho M; Khan A; Kim KH; Ahn WS; Kwon EE;
Address:		"Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea. Department of Civil Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta, Pakistan. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea. Electronic address: kkim61@hanyang.ac.kr. Department of Chemistry and Chemical Engineering, Inha University, Incheon, 402-751, Republic of Korea. Department of Environment and Energy, Sejong University, Seoul, 05005, Republic of Korea. Electronic address: ekwon74@sejong.ac.kr"
Journal Title:		Environ Res
Year:		2019
Volume:		20190820
Issue:
Page Number:		108672 -
DOI:		10.1016/j.envres.2019.108672
ISSN/ISBN:		1096-0953 (Electronic) 0013-9351 (Linking)
Abstract:		"Intense efforts have been made to eliminate toxic volatile organic compounds (VOCs) in indoor environments, especially formaldehyde (FA). In this study, the removal performances of gaseous FA using two metal-organic frameworks, MOF-5 and UiO-66-NH(2), and two covalent-organic polymers, CBAP-1 (EDA) and CBAP-1 (DETA), along with activated carbon as a conventional reference material, were evaluated. To assess the removal capacity of FA under near-ambient conditions, a series of adsorption experiments were conducted at its concentrations/partial pressures of both low (0.1-0.5?ª+ppm/0.01-0.05?ª+Pa) and high ranges (5-25?ª+ppm/0.5-2.5?ª+Pa). Among all tested materials at the high-pressure region ?a+ (e.g., at 2.5?ª+ppm FA), a maximum adsorption capacity of 69.7?ª+mg?ª+g(-1) was recorded by UiO-66-NH(2). Moreover, UiO-66-NH(2) also displayed the best 10% breakthrough volume (BTV10) of 534?ª+L?ª+g(-1) (0.5?ª+ppm FA) to 2963?ª+L?ª+g(-1) (0.1?ª+ppm FA). In contrast, at the high concentration test (at 5, 10, and 25?ª+ppm FA), the maximum BTV10 values were observed as: 137 (UiO-66-NH(2)), 144 (CBAP-1 (DETA)), and 36.8?ª+L?ª+g(-1) (CBAP-1 (EDA)), respectively. The Langmuir isotherm model was observed to be a better fit of the adsorption data than the Freundlich model under most of the tested conditions. The superiority of UiO-66-NH(2) was attributed to the van der Waals interactions between the linkers (framework) and the hydrocarbon 'tail' (FA) coupled with interactions between its open metal sites and the FA carbonyl groups. This study demonstrated the good potential of these advanced functional materials toward the practical removal of gaseous FA in indoor environments"
Keywords:		Adsorption Formaldehyde/*chemistry Gases *Metal-Organic Frameworks Metals Air pollution controls (APCs) Formaldehyde Functionalized adsorbent Metal organic frameworks (MOFs);
Notes:		"MedlineVikrant, Kumar Cho, Minkyu Khan, Azmatullah Kim, Ki-Hyun Ahn, Wha-Seung Kwon, Eilhann E eng Research Support, Non-U.S. Gov't Netherlands 2019/08/27 Environ Res. 2019 Nov; 178:108672. doi: 10.1016/j.envres.2019.108672. Epub 2019 Aug 20"