Comparative biosorption kinetics study of Ni and Zn metal ions from the aqueous phase in sulfate medium by the wooden biomass of Dalbergia sissoo.

Autor: Tiwari, Shatakshi1 (AUTHOR), Aachhera, Sugandha1 (AUTHOR), Garg, Himanshi1,2 (AUTHOR), Rojra, Manish1 (AUTHOR), Nagar, Neha1 (AUTHOR) nagar.neha15@gmail.com, Gahan, Chandra Sekhar1,3 (AUTHOR) gahancsbiometal@gmail.com
Předmět:
Zdroj: Environmental Quality Management. Jun2022, Vol. 31 Issue 4, p63-73. 11p. 8 Charts, 10 Graphs.
Abstrakt: The study aims to assess the suitability of Dalbergia sissoo sawdust as a natural, i.e., nonmodified or nonchemically treated, biosorbent of zinc and nickel metal ions. The effect of important factors influencing biosorption, viz., pH, agitation rate, biomass content, metal concentration, contact time on the metal adsorption potential of sawdust, was investigated for biosorption. Further, isotherms and kinetic models were employed to understand the kinetics of the sorption process. Maximum biosorption of Zn and Ni was found at 20 and 10 mg/L concentrations at pH 7 and 5, agitation rate 120 and 100 rpm, biomass content of 1.5 and 0.5 g, and contact time 30 minute and 90 minutes, respectively. Adsorption isotherm models of Langmuir and Freundlich showed a good fit for Zn and Ni metal ions, respectively. Both metal ions followed pseudo‐second‐order kinetics during the biosorption process mainly governed by the chemisorption process via covalent interactions between metal ions and sawdust. The results support D. sissoo sawdust as a low‐cost biosorbent at low concentrations of Ni and Zn. This can predict the efficiency of the untreated sawdust of D. sissoo to eliminate the low concentration of Zn and Ni heavy metals from wastewaters. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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