Isotherm and thermodynamic studies of the biosorption of copper (II) ions by Erythrodontium barteri

International Journal of Physical Sciences

N. A. Adesola Babarinde¹ 

关键词: Biosorption;    Erythrodontium barteri;    copper (II);    isotherm.;   

DOI  :  

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

The biosorption of Cu(II) from dilute aqueous solution usingErythrodontium barterias a biosorbent has been studied as a function of pH, contact time and initial Cu(II) ion concentration at the temperature of 27o­­­C. The residual Cu(II) in solution was determined using atomic absorption spectrophotometer. The pH study shows that pH dependence of biosorption and optimum pH was 5. The study on contact time shows that the biosorption is time dependent and maximum biosorption was obtained after 150 min. The adsorption isotherms obtained fitted well into the Freundlich and Langmuir isotherms. The Freundlichequation obtained is log Γ = 0.8549log Ce+ 1.5566 while the Langmuir equation is:= 0.0254/Ce + 0.0026 with correlation factors of 0.9917 and 0.9907, respectively. The standard deviationsare 0.0159 and 0.0006, respectively. The free energy change (ΔG˚) obtained for the biosorption of Cu(II) at the temperature of 297K, initial Cu(II) concentration of 100 mgL-1and pH 5 is -11.108 kJmol-1. This result indicates that the biosorption process is highly spontaneous and therefore shows thatErythrodontium barteribiomass could be successfully used for the biosorption of Cu(II) from waste streams.

【 授权许可】

CC BY