Open AccessPROCESS FOR REMOVAL OF CHROMIUM ION FROM LEATHER INDUSTRIAL WASTES BY ACTIVATED PURE RICE HUSK
Author(s) -
Yakubu Abdulkadir,
Abdullah Abd Halid,
A. Y. Abdulazeez,
N.S. Gulumbe,
M. Rukaiyat,
C. I. Yakubu,
A. Anteyi
Publication year - 2021
Publication title -
fudma journal of sciences
Language(s) - English
Resource type - Journals
ISSN - 2616-1370
DOI - 10.33003/fjs-2020-0404-490
Subject(s) - husk , adsorption , exothermic reaction , enthalpy , chromium , langmuir , freundlich equation , chemistry , metal ions in aqueous solution , nuclear chemistry , gibbs free energy , materials science , ion , thermodynamics , organic chemistry , botany , physics , biology
The removal of (Cr) ions from industrial wastage by adsorption on rice husk was investigated based on activated pure rice husk dosage, stay time, metal concentration and solution temperature. The optimum values of activated pure rice husk dosage and stay time were determined to be 0.5gm/50ml solution and 60 mins, respectively, for the adsorption of (Cr) ions. The constant for the Freundlich, D-R and Langmuir isotherms were 50%, calculated at 50 . The adsorption of (Cr) from industrial wastage was found to be exothermic. Thermodynamic parameters such as free energy change ( G°), enthalpy change ( H°) and entropy change ( S°) of adsorption also calculated and interpreted from the slope and intercept of the plots of lnkD vs I/T. The G° value decreases with rise in temperature and the negative values of H° indicate that the adsorption of (Cr) from industrial wastage was an exothermic process while positive values of change in entropy ( S°) were also observed