期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 29, 期 48, 页码 73444-73460出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-21018-y
关键词
Epichlorohydrin; Beta-cyclodextrin; Adsorption; Langmuir; Endothermic; Wastewater
A novel composite material, RGO-beta CD-ECH, was synthesized and used for the treatment of phenolic wastewater. The synthesized composite showed excellent adsorption performance for phenolic pollutants, with high uptake and fitting the pseudo-second-order model. Thermodynamic data revealed that the adsorption process is spontaneous and endothermic. The composite also demonstrated good removal efficiency for synthetic industrial effluents.
A novel composite consisting reduced graphene oxide-functionalized beta-cyclodextrin epichlorohydrin polymer (RGO-beta CD-ECH) was synthesized for the treatment of phenolic wastewater. Batch study of phenolic pollutants (2,4-dichlorophenol, 2-chlorophenol, and phenol) was analyzed using the synthesized composite as an adsorbent from an aqueous solution. The optimized parameters were temperature 25 degrees C, adsorption time 60 min, solution pH 7, and dosage 0.25 g/L. The isotherm data were more suitably fitted by the Langmuir isotherm model. The maximum uptake for 2,4-dichlorophenol, phenol, and 2-chlorophenol was 702.853, 659.475, and 674.155 mg/g, respectively, at 25 +/- 1 degrees C. The kinetic data for all the phenolic pollutants follow the pseudo-second-order model, and the rate was controlled by film diffusion. Thermodynamic data revealed that the process of removing phenolic pollutants is spontaneous and endothermic. The composite can be used up to five cycles with a small reduction in the removal. Adsorption performance of the synthesized composite for synthetic industrial effluents shows that up to 78% removal occurred in 60 min adsorption time. Based on the remarkably rapid adsorption and high adsorption capacity, the synthesized composite can be considered an efficient adsorbent for treating phenolic pollutants from wastewater.
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