Sorption of Ni(II) on Na-rectorite from aqueous solution: Effect of pH, ionic strength and temperature

Autor:	Pengpeng Chang, Wangsuo Wu, Shaoming Yu, Xiangke Wang
Rok vydání:	2007
Předmět:	Colloid and Surface Chemistry Aqueous solution Adsorption Chemistry Ionic strength Mass content Inorganic chemistry Ph dependence Sorption Surface complexation Endothermic process
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. 302:75-81
ISSN:	0927-7757
Popis:	Removal of Ni(II) from aqueous solutions by sorption onto Na-rectorite was investigated under ambient conditions. Experiments were carried out as a function of mass content, pH, ionic strength and temperature. The results indicated that the sorption of Ni(II) was strongly dependent on pH value and ionic strength. Sorption of Ni(II) increased with increasing pH and decreasing ionic strength. The sorption of Ni(II) on Na-rectorite was mainly dominated by cation exchange at acidic conditions, whereas surface complexation was the main sorption mechanism at neutral to alkaline pH values. The effect of temperature on Ni(II) sorption on Na-rectorite was negligible at low pH (∼pH 6. The thermodynamic parameters (Δ H , Δ S , and Δ G ) for Ni(II) sorption onto Na-rectorite were calculated from the temperature dependence, and the results suggested that the sorption reaction was endothermic.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0bff8aa2ace128737528e91990d30fed https://doi.org/10.1016/j.colsurfa.2007.01.040 Zobrazit plný text záznamu Full Text from ScienceDirect