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- Title
Batch and flow-through column adsorption study: recovery of Pt4+ from aqueous solutions by 3-aminopropyl(diethoxy)methylsilane functionalised zeolite (APDEMSFZ).
- Authors
Mosai, Alseno K.; Chimuka, Luke; Cukrowska, Ewa M.; Kotzé, Izak A.; Tutu, Hlanganani
- Abstract
The recovery of platinum from waste is of high importance since significant concentrations are lost during processing, but the current methods are not economically effective. The removal of Pt4+ from aqueous solutions at different conditions using zeolite functionalised with 3-aminopropyl(diethoxy)methylsilane (APDEMS) was investigated. The adsorbent was used to assess the effect of adsorbent mass, pH, concentration, time and competing ions on the removal of Pt4+ so that optimum working conditions could be determined. The two- and three-parameter isotherm models as well as kinetic models were fitted using the experimental data. Effect of adsorbent bed height (2 and 5 cm), pH (2–7) and initial concentration (2 and 5 mg L−1) was determined with column experiments. Significant adsorption capacity was achieved with 100 mg adsorbent at pH 2, within 180 min. Adsorption capacity of Pt4+ significantly decreased at pH > 2. Higher bed depth increased the exhaustion and breakthrough times. The adsorption capacity of Pt4+ increased as bed height and concentration increased. The highest breakthrough and exhaustion times were achieved at pH 2. Strong Pt4+-adsorbent interaction concluded from the experiments, adsorption kinetics and isotherms models indicates that APDEMSFZ is suitable for Pt4+ recovery from mining wastewater.
- Subjects
AQUEOUS solutions; ADSORPTION kinetics; METHYLSILANE; ADSORPTION capacity; ADSORPTION isotherms; ADSORPTION (Chemistry); LANGMUIR isotherms
- Publication
Environment, Development & Sustainability, 2021, Vol 23, Issue 5, p7041
- ISSN
1387-585X
- Publication type
Article
- DOI
10.1007/s10668-020-00903-x