Biosorption of Lead (II) Ions by Brown Algae: A Thermodynamic Study

Authors

  • Salihu Yahuza Department of Microbiology and Biotechnology, Faculty of Science, Federal University Dutse, P.M.B., 7156, Dutse, Jigawa State, Nigeria.
  • Ibrahim Alhaji Sabo Department of Microbiology, Faculty of Pure and Applied Sciences, Federal University Wukari, P.M.B. 1020 Wukari, Taraba State Nigeria.
  • Abdussamad Abubakar Department of Microbiology, Faculty of Science, Bauchi State University Gadau, P.M.B. 65 Itas Gadau, Bauchi State, Nigeria.
  • Mohd Yunus Shukor Department of Biochemistry, Faculty of Biotechnology and Biomolecular Science Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, D.E, Malaysia.

DOI:

https://doi.org/10.54987/bessm.v4i2.558

Keywords:

thermodynamic parameters; equilibrium constants; lead; Cystoseira stricta; biomass

Abstract

In the assessment of adsorption processes, thermodynamic experiments on the adsorption process play a critical role (both physical and chemical). The precision measurement of thermodynamic parameters relies on the equilibrium constants between two phases (KL: dimensionless). In this study, thermodynamic parameters were calculated from the KL constant derived from the adsorption of Langmuir isotherms of Pb(II) on alkali-treated brown algae Cystoseira stricta biomass at different temperatures with removal of outliers. The conversion of the KL values to the dimensionless Kc values based on the Langmuir model was then assessed for thermodynamic parameters via the van’t Hoff’s equation. The Pb(II) adsorption process onto the Cystoseira stricta biomass was spontaneous and feasible with ï„G values at 30, 35 and 40 oC of -18.74 (95% C.I., -19.49 to -17.98), -20.8 (95% C.I.,-21.49 to -20.11) and -21.82 (95% C.I.,-22.24 to -21.41), respectively, and occurred in an endothermic nature (ï„H= 0.31 kJ/mol (95% C.I., -107.90 to 108.52) with an increased in randomness (ï„S= 309.78 J/mol×K (95% C.I., 95% C.I., 275.92 to 343.64) kJ/mol). Resampling methods such as bootstrap, jacknife or Monte Carlo simulation may be carried out in the future to confirm the accuracy and precision of the asymptotatic 95% confidence interval, .

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Published

2020-12-31

How to Cite

Yahuza, S., Sabo, I. A., Abubakar, A., & Shukor, M. Y. (2020). Biosorption of Lead (II) Ions by Brown Algae: A Thermodynamic Study. Bulletin of Environmental Science and Sustainable Management (e-ISSN 2716-5353), 4(2), 1–5. https://doi.org/10.54987/bessm.v4i2.558

Issue

Vol. 4 No. 2 (2020)

Section

Articles

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