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Adsorption of Cr(VI) in aqueous solution using sago bark (Metroxylon sagu) as a new potential biosorbent
Abstract
This paper investigated the ability of sago bark (Metroxylon sagu) as a new potential biosorbent in removing Cr(VI) in batch system. The optimum adsorption capacity of sago bark (Metroxylon sagu) was 61.73 mg/g achieved at pH 3, agitation rate of 100 rpm, contact time 60 min, particle size ≤32 μm, and initial concentration of Cr(VI) 1,000 mg/L at room temperature (25°C). The adsorbent regeneration was carried out using 0.01 M HNO3 with regeneration efficiency of 78.35%. The adsorption data fitted better to Freundlich and Langmuir equilibrium isotherm models. The data confirmed that Cr(VI) sorption onto sago bark (Metroxylon sagu) has good agreement with pseudo-second-order model. The thermodynamic study indicated that Cr(VI) sorption onto sago bark (Metroxylon sagu) occurred as exothermic in nature (DH = –72.55 kJ/mol), which was required energy for adsorption process, and the disorderliness decreased as temperature increased (DS = –263.06 J/mol). Thus, it can be concluded that sago bark (Metroxylon sagu) can be utilized as a potential adsorbent in Cr(VI) removal.
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Authors (5)
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Aziz Hermansyah
- Department of Chemistry Andalas University
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Dahlan Dahyunir
- Department of Chemistry Andalas University
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Rahmiana Zein
- Department of Chemistry Andalas University
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Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Desalination and Water Treatment
no. 147,
pages 191 - 202,
ISSN: 1944-3994 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Fauzia S., Hermansyah A., Dahyunir D., Namieśnik J., Zein R.: Adsorption of Cr(VI) in aqueous solution using sago bark (Metroxylon sagu) as a new potential biosorbent// Desalination and Water Treatment. -Vol. 147, (2019), s.191-202
- DOI:
- Digital Object Identifier (open in new tab) 10.5004/dwt.2019.23577
- Verified by:
- Gdańsk University of Technology
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