Journal
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 130, Issue -, Pages 78-86Publisher
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.cherd.2017.12.001
Keywords
Adsorption; Removal; Heavy metal ions; Thiourea; D301 resin
Categories
Funding
- National Natural Science Foundation of China [21676258]
- International Science & Technology Cooperation Program of China [2011DFA51980]
- Shanxi Science & Technology Cooperation Program [2015081043]
- Natural Science Foundation of Shanxi Province [201601D102021]
- Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering [CZL201501]
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High adsorption capacity, short adsorption time, and easy regeneration are very important and urgently needed for qualified adsorbents used in removing toxic heavy metals from wastewater. Based on this, a thiourea modified D301 resin (TD301) was designed and prepared via simple grafting polymerization and modification procedure. The TD301 was characterized by the scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR) and elemental analysis. The adsorption performances of TD301 towards low concentration of toxic heavy metal ions from aqueous solution were investigated. By virtue of the abundant amine and C=S groups, TD301 possesses strong adsorption ability for Hg(II), Pb(II) and Cd(II). The pH and temperature have a great influence on the adsorption capacity. The adsorption capacities of TD301 towards Hg(II), Pb(II) and Cd(II) could reach 454.1, 436.6 and 254.1 mg g(-1) at 293 K and pH of 6, respectively. The adsorption process could be well described by the Lagergren-first-order model and was a Langmuir monolayer chemical adsorption. The adsorption thermodynamic experiment indicated that adsorption of TD301 towards Hg(II), Pb(II) and Cd(II) was an endothermic and spontaneous process drived by entropy. In addition, TD301 could be reused almost without any loss in the adsorption capacity. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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