Zinc adsorption by lime‐treated montmorillonite clay

Autor:	Tsau-don Tsai, P. Aarne Vesilind
Rok vydání:	1999
Předmět:	Environmental Engineering Inorganic chemistry Nucleation chemistry.chemical_element General Medicine Zinc engineering.material chemistry.chemical_compound Montmorillonite Adsorption chemistry Physisorption Chemisorption engineering Batch test Lime
Zdroj:	Journal of Environmental Science and Health, Part A. 34:103-124
ISSN:	1532-4117 1093-4529
Popis:	In this research, lime‐treated montmorillonite clay is used to adsorb Zn(II) in a wide range of Zn(II) concentrations. Batch test results show that the adsorption of Zn(II) by montmorillonite appears to be dominated by different adsorption mechanisms. At low Zn(II) concentrations, chemisorption affects the amount of Zn(II) adsorbed by montmorillonite. When lime is added, physisorption becomes increasingly important. At high Zn(II) concentrations, physisorption is the dominant mechanism for Zn(II) adsorption. Lime also enhances the ability of montmorillonite to adsorb Zn(II) at low initial Zn(II) concentrations, and does not significantly affect the ability of montmorillonite to adsorb Zn(II) at high initial Zn(II) concentrations. In chemisorption, montmorillonite provides cation exchange sites for the adsorption of Zn(II). In physisorption, montmorillonite acts as not only nucleation center to adsorb zinc hydroxide‐oxides but also helps to coagulate the zinc hydroxide‐oxides. Lime‐treated clay ca...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28e8684485d5857ad5117159c10fd024 https://doi.org/10.1080/10934529909376826 Zobrazit plný text záznamu