LAPSE:2020.1276
Published Article
LAPSE:2020.1276
Efficient Removal of Ni(II) from Aqueous Solution by Date Seeds Powder Biosorbent: Adsorption Kinetics, Isotherm and Thermodynamics
Abubakr Elkhaleefa, Ismat H. Ali, Eid I. Brima, A. B. Elhag, Babiker Karama
December 22, 2020
Adsorption investigations in batch approaches were performed to explore the biosorption of Ni(II) ions from aqueous solutions on date seeds powder. The effects of pH, particle size, initial concentration of Ni(II) ions, adsorbent mass, temperature, and contact on the adsorption efficacy were studied. The maximum removal obtained was 90% for an original Ni(II) ion solution concentration of 50 ppm was attained at pH 7 after 30 min and with 0.30 g of an added adsorbent. The four adsorption models, namely Freundlich, Langmuir, Dubinin−Radushkevich (D−R), and Temkin were examined to fit the experimental findings. The adsorption system obeys the Freundlich model. The system was found to follow the pseudo-second order kinetic model. Thermodynamic factors; entropy (ΔS°), enthalpy (ΔH°), and Gibbs free energy (ΔG°) changes were also assessed. Results proved that adsorption of Ni(II) ions is exothermic and spontaneous. Sticking probability value was found to be less than unity, concluding that the process is dominated by physical adsorption.
Keywords
Adsorption, date seeds, isotherm, kinetics, thermodynamics
Suggested Citation
Elkhaleefa A, Ali IH, Brima EI, Elhag AB, Karama B. Efficient Removal of Ni(II) from Aqueous Solution by Date Seeds Powder Biosorbent: Adsorption Kinetics, Isotherm and Thermodynamics. (2020). LAPSE:2020.1276
Author Affiliations
Elkhaleefa A: Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61413, Saudi Arabia; Department of Chemical Engineering and Chemical Technology, University of Gezira, Wadmedani 21113, Sudan [ORCID]
Ali IH: Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia [ORCID]
Brima EI: Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia; School of Allied Health Science, De Montfort University, The Gateway, Leicester LE1 9BH, UK [ORCID]
Elhag AB: Department of Civil Engineering, College of Engineering, King Khalid University, Abha 61413, Saudi Arabia; Department of Geology, Faculty of Science, Kordofan University, Elobied 51111, Sudan
Karama B: Department of Chemical Engineering, Karary University, Khartoum 14411, Sudan
Journal Name
Processes
Volume
8
Issue
8
Article Number
E1001
Year
2020
Publication Date
2020-08-17
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr8081001, Publication Type: Journal Article
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LAPSE:2020.1276
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doi:10.3390/pr8081001
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Dec 22, 2020
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CC BY 4.0
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Dec 22, 2020
 
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Dec 22, 2020
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Calvin Tsay
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