International Journal of Environmental Science and Research

International Journal of Environmental Science and Research

Bio-Sorption of Cadmium, Arsenic, and Lead by Dead Sargassum Algae and Mangrove Leaves: A Green Approach for metals Removal from Aqueous Solutions Using Experimental Designs

Document Type : Original Article

Authors
1 2Department of Environmental Sciences, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology.
2 Iranian National Institute for oceanography and atmospheric science
3 Department of Environmental Sciences, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology.
Abstract
In this study the ability of Mangrove leaves to bio-sorb three metal ions, namely arsenic, cadmium and lead from aqueous solutions was investigated. Removal of the metal ions by the dead biomasses was affected by experimental parameters such as pH, contact time, biomass dosage and initial metals ion concentrations. In this investigation optimization of different parameters were performed simultaneously in presence of a mixture of the three metals in aqueous solutions. The initial condition to optimize adsorption conditions to remove arsenic, lead and cadmium was consisted of 20 mg. L-1 metals concentrations, 10 gr. L-1 biomass dose, and 60 minute contact time, 25 °C environmental temperature and pH 5. The results showed that under optimized condition, the removal efficiency of arsenic, lead and cadmium were 100, 97 and 99% by Sargassum and 92, 99 and 92% by Mangrove leaves from 10 mg L-1 aqueous solution of the metal ions. The results demonstrated that the bio sorbent can perfectly remove the three metal ions from aqueous solutions.
Keywords

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