Thermodynamic Study on the Biosorptive Removal of Lead (II) Ions from Aqueous Solutions using Acid-treated Cystoseira tricta Biomass

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/jemat.v8i2.563

Keywords:

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

Abstract

Thermodynamic studies on adsorption process play a vital role in the estimation of adsorptive mechanisms (both physical and chemical). Estimating the accuracy of thermodynamic parameters is dependent upon 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 an sulphuric acid-treated brown algae Cystoseira stricta biomass at different temperatures. 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 DG values at 25, 30, 35 and 40 oC of -24.56 (95% C.I., -24.00 to -25.03), -22.60 (95% C.I.,-21.95 to -23.12), -20.90 (95% C.I.,-18.87 to -22.01) and -17.17 (95% C.I.,-17.71 to -21.41), respectively, and occurred in an endothermic nature (DH= -0.30 kJ/mol (95% C.I., -194.34 to 193.74) with an increased in randomness (DS= -299.47 J/mol×K (95% C.I., -553.60 to -45.35) kJ/mol). To confirm the accuracy and precision of the asymptotatic 95% confidence interval, Monte Carlo simulation may be carried out in the future.

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Published

31.12.2020

How to Cite

Yahuza, S., Sabo, I. A., Abubakar, A., & Shukor, M. Y. (2020). Thermodynamic Study on the Biosorptive Removal of Lead (II) Ions from Aqueous Solutions using Acid-treated Cystoseira tricta Biomass. Journal of Environmental Microbiology and Toxicology, 8(2), 1–5. https://doi.org/10.54987/jemat.v8i2.563

Issue

Vol. 8 No. 2 (2020)

Section

Articles

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