Investigation of the efficiency of oyster shell nano particles in removal of lead from aqueous solutions in batch system

Document Type : Research Paper

Authors

1 M.Sc Student in Environmental Science and Engineering, Environmental Pollution, Gorgan University of Agricultural Sciences and Natural Resources. Gorgan, Iran

2 Associate Professor, Department of Environmental Sciences Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

3 Professor, Department of Fisheries and Aquatic Ecology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

Abstract

Background and objective: Wastewater water containing heavy metals cause to reduce the water quality, toxic effects, carcinogens and irreparable damage to the environment. Therefore, today, different methods are used to remove heavy metals from water sources, which adsorption is one of these methods. In this research, lead elimination using binocular oyster shell nanoparticles has been studied due to the high adsorption capacity and economical cost.
Research method: In this research, the efficiency of adsorption of lead ions by binocular oyster shell at pH, contact time, temperature, adsorbent concentration and various concentrations was investigated. Experiments were conducted in a batch system. Finally, the adsorption process was studied with Freundlich and Langmuir isotherm models, first-order and pseudo-second order kinetic models.
Result: According to the results of this study, the optimal values of each agent were obtained at pH 6, initial concentration of 50 mg /L, contact time 60 minutes, temperature 25 ° C and adsorbent 0.01 g, respectively. The results also showed that the adsorption process follow Freundlich isotherm and the pseudo-second order kinetic model.
Conclusion: The oyster shell absorber has a good effect on ion removal due to many advantages such as cheap, abundant, low energy consumption, less sludge production, easier recycling of heavy metals adsorbed onto nanoparticles, and high absorption potential of Lead from aquatic environments.

Keywords

Main Subjects

References

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Environmental Resources Research
Volume 12, Issue 2
September 2024
Pages 199-210

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