Kinetic and Adsorption Isotherm studies for the removal of Heavy Metals by Rhizoclonium Species.

Research Journal of Pharmaceutical, Biological and Chemical Sciences

article

Kirti Srivastava¹  Ashima Srivastava¹  Pratibha Singh.² 

[1] Department of Chemistry;Enviro Infra Solutions Pvt. Ltd.

关键词: Rhizoclonim;    Heavy metals;    Adsorption;    Chemical kinetics;    Isotherm;   

DOI  :  10.33887/rjpbcs/2022.13.4.9

学科分类：工程和技术（综合）

来源: Research Journal of Pharmaceutical, Biological and Chemical Sciences

【 摘 要 】

The intrinsic characteristic of algae for the uptake (adsorption) and accumulation of heavymetals is the one of the best eco-friendly techniques used for the removal of toxic pollutants fromwastewater. In the present work, removal efficiency of microalgae Rhizoclonim species was determinedfor Cd(II) and Cu(II) removal at different initial concentration of metal ions, pH and contact time. Withincrease in concentration of metal ions, removal efficiency was diminished.With respect to the contacttime, it was found that maximum removal of Cd(II) by Rhizoclonim sp. was 75.48% at 30 minutes and79.21% for Cu(II) at same contact time.Maximum removal of metal ions occurred at optimum pH rangeof 6-8. The isotherm study was carried out for each metal by applying the experimental results onto theLangmuir and Freundlich models. The results suggested that Rhizoclonim sp. followed Freundlichadsorption model for Cu uptake whereas for Cd uptake, Langmuir model gave better correlation values2 (R >0.9)). The experimental data of adsorption was also applied to different kinetic models and it couldbe established that adsorption kinetics followed the pseudo-second-order kinetics.

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