Competitive Adsorption Characteristics of Rapid Cooling Slag in Single- and Multi-Metal Solutions
| Autor: | Se-Won Kang, Seong-Heon Kim, Jong-Hwan Park, Byung-Hwa Kang, Seong-Tae Lee, Hong-Chul Kim, Dong-Cheol Seo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies Cadmium Langmuir Inorganic chemistry 0211 other engineering and technologies Langmuir adsorption model chemistry.chemical_element Slag 02 engineering and technology General Medicine 010501 environmental sciences 01 natural sciences Metal symbols.namesake Adsorption chemistry visual_art symbols visual_art.visual_art_medium Freundlich equation Absorption (chemistry) 0105 earth and related environmental sciences |
| Zdroj: | Korean Journal of Environmental Agriculture. 35:24-31 |
| ISSN: | 2233-4173 1225-3537 |
| DOI: | 10.5338/kjea.2016.35.1.10 |
| Popis: | BACKGROUND: Heavy metal adsorption not only depends on rapid cooling slag(RCS) characteristics but also on the nature of the metals involved and on their competitive behavior for RCS adsorption sites. The goal of this study was to investigate the competitive absorption characteristics of Cu, Cd and Zn in single- and multi-metal forms by RCS.METHODS AND RESULTS: Both single- and multi-metal adsorption experiments were conducted to determine the adsorption characteristics of RCS for the heavy metals. Adsorption behaviors of the heavy metals by RCS were evaluated using both the Freundlich and Langmuir adsorption isotherm equations. The maximum adsorption capacities of metals by RCS were in the order of Cu(16.6 mg/g) > Cd(8.1 mg/g) > Zn(6.2 mg/g) in the single-metal adsorption isotherm and Cu(14.5 mg/g) >> Zn(1.3 mg/g) > Cd(0.6 mg/g) in the multi-metal adsorption isotherm. Based on data obtained from Freundlich and Langmuir adsorption models and three-dimensional simulation, multi-metal adsorption behaviors differed from single- metal adsorption due to competition. Cadmium and Zn were easily exchanged and substituted by Cu during multi-metal adsorption.CONCLUSION: Results from adsorption experiments indicate that competitive adsorption among metals increases the mobility of these metals. |
| Databáze: | OpenAIRE |
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