Adsorption of Cu (II) and Zn (II) from Water by Jatropha curcas L. as Biosorbent
| Autor: | Herbert Nacke, Marcelo Gonçalves dos Santos, Gustavo Ferreira Coelho, Affonso Celso Gonçalves, Marcelo Angelo Campagnolo, Dionir Luiz Briesch, Juliano Zimmermann, Daniel Schwantes |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies biology Chemistry zinc agroindustrial residues 0211 other engineering and technologies natural adsorbents chemistry.chemical_element 02 engineering and technology General Chemistry Zinc 010501 environmental sciences biology.organism_classification 01 natural sciences Copper Adsorption copper Materials Chemistry QD1-999 Jatropha curcas remediation of water resources 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Open Chemistry, Vol 14, Iss 1, Pp 103-117 (2016) |
| ISSN: | 2391-5420 |
| DOI: | 10.1515/chem-2016-0010 |
| Popis: | The objective of this work was to evaluate the removal of Cu2+ and Zn2+ in water by means of the adsorption process using three biosorbents derived from jatropha biomass (bark, endosperm and endosperm + seed coat). The experiments were performed in batch and evaluated the effect of solution pH, adsorbent mass, contact time, different initial concentrations of the metals Cu2+ and Zn2+, and the temperature of the solution during the adsorptive process. By kinetics, the adsorption isotherms and thermodynamics the mechanisms that control the adsorptive process were evaluated. The optimal conditions for the realization of the adsorptive process for both metals were: solution pH of 5.0 and 8 g L-1 of adsorbent mass per volume of solution, with a contact time between adsorbent and adsorbate of 60 min. According to the Langmuir model, the maximum adsorption capacities for the bark, endosperm and endosperm + seed coat of Jatropha were, respectively, for Cu2+ 11.541, 20.475 and 22.910 mg g-1, and for Zn2+ 14.852; 15.888 and 14.674 mg g-1, with the predominance of chemisorption in monolayer. The three biosorbents derived from the biomass of Jatropha have potential for the remediation of water contaminated with Cu2+ and Zn2+. |
| Databáze: | OpenAIRE |
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