Adsorption of Haloacetonitriles (HANs) by Metal-Organics Frameworks (MOFs)

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Published: Jul 1, 2019

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Phattarawarin Rodbutr
International Postgraduate Program in Hazardous Substance and Environmental Management (IP-HSM) Graduated School, Chulalongkorn University, Bangkok 10330, Thailand
Patiparn Punyapalakul
Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University ; Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University ; Research unit Control of Emerging Micropollutants in Environment, Chulalongkorn University ; Research Network of NANOTEC – CU on Environment, Department of Environmental Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Abstract

This research investigated adsorption efficiency of HANs by using Dichloroacetonitrile (DCAN) as a represent on metal organic frameworks (MOFs; ZIF-8, MIL-53(Al), HKUST-1) and carbonized metal organic frameworks (C-MOFs; C-ZIF-8, C-MIL-53(Al), C-HKUST-1) comparing with powder activated carbon (PAC). ZIF-8, MIL-53(Al) were synthesized via room temperature method, and HKUST-1was synthesized via solvothermal method. Original MOFs were carbonized in tube furnace with N2 flow at 900 oC. The synthesized materials were characterized the crystallized pattern by X-ray diffraction (XRD). The screening experiment was studied to select the potential adsorbents C-MOFs. As a result, C-ZIF-8, C-MIL-53(Al) and PAC which process high adsorption capacities of DCAN, were selected for kinetic and isotherm study. The adsorption kinetics and isotherm were studied to examine the adsorption mechanism under batch condition. According to the results, the adsorption rate and capacity of C-ZIF-8 exhibited the higher amount than C-MIL-53(Al) and PAC. Pseudo-second order models were applied for adsorption kinetic models. The adsorption isotherm was fitted  with Langmiur and Fruendlich models.

Article Details

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Vol. 33 No. 1 (2019): January-April
Section
Research Articles

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