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Open AccessArticle

Elemental Mercury Adsorption by Cupric Chloride-Modified Mesoporous Carbon Aerogel

1
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
2
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2018, 2(4), 66; https://doi.org/10.3390/colloids2040066
Received: 28 October 2018 / Revised: 22 November 2018 / Accepted: 30 November 2018 / Published: 2 December 2018
Mesoporous carbon aerogels (MCA) synthesized via aqueous polymerization of resorcinol and formaldehyde were modified by copper chloride and applied for adsorption removal of elemental mercury (Hg0) at a low temperature. The sorbents were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, and X-ray photoelectron spectroscopy (XPS) techniques. The results show that CuCl2-modified MCA exhibited good ability for Hg0 adsorption in the 40–160 °C temperature range, with Hg0 removal efficiency all above 95.0%. The Hg0 removal efficiency first increased and then decreased with the elevation of reaction temperature. It performed optimally at 80 °C with the highest Hg0 removal efficiency of 98.7%. XPS results indicate that covalent chlorines (C-Cl groups) play an important role in elemental mercury adsorption process. Hg0 is firstly captured in the form of oxidized mercury (Hg2+) and then reacts with C-Cl groups to form HgCl2. View Full-Text
Keywords: elemental mercury; carbon aerogel; covalent chlorine; copper chloride elemental mercury; carbon aerogel; covalent chlorine; copper chloride
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Liu, D.; Lu, C.; Wu, J. Elemental Mercury Adsorption by Cupric Chloride-Modified Mesoporous Carbon Aerogel. Colloids Interfaces 2018, 2, 66.

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