文章基本信息

标题：Adsorption mechanism of malachite green onto activated phosphate rock: a kinetics and theoretical study
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作者：Nouar Sofiane Labidi ; Nour Elhouda Kacemi
期刊名称：Bulletin of Environmental Studies
印刷版ISSN：2414-8121
电子版ISSN：2518-458X
出版年度：2016
期号：3
页码：69-74
语种：English
出版社：MN Publishers
摘要：Adsorption kinetics of malachite green onto the Algerian activated phosphate rock was studied for better removal of the dye from wastewater. The prepared sorbent displayed à good surface area of 42.2 m²/g. The adsorption process appeared to be of physisorption nature and it took less than 60 min to get equilibrium whereas the kinetics indicated that the adsorption is likely a second order reaction, which is further proved with the high R2 value. The intraparticle diffusion model confirms an adsorption mechanism limited on two steps, i.e., (1) surface adsorption, and (2) pore diffusion with a diffusion parameter of Di=10-18 cm2/s. Besides, semi-empirical theoretical calculations provide a new insight into adsorption mechanism as a principle of hydrogen bonding and ionic interaction.