Sargassum latifolium as eco-friendly materials for treatment of toxic nickel (II) and lead (II) ions from aqueous solution

E. Al Prol, Ahmed; E. A. El-Metwally, Mohamed; Amer, Adel

doi:10.21608/ejabf.2019.66839

Sargassum latifolium as eco-friendly materials for treatment of toxic nickel (II) and lead (II) ions from aqueous solution

Document Type : Original Article

Authors

10.21608/ejabf.2019.66839

Abstract

The current study was undertaken to estimate the effectiveness of the brown algae Sargassum latifolium in removal of Ni²⁺ and Pb²⁺ ions from metal solution by adsorption as alternative low-cost adsorbents. Laboratory batch examination was conducted to estimate the influence of contact time, pH, initial Ni²⁺ and Pb²⁺ ions concentration, temperature and adsorbent dose on adsorption efficiency. The highest metal removal was obtained under condition of pH 7&6, temperature 25 & 30^oC , contact time of 5 & 60 min for Ni²⁺and Pb²⁺ions respectively, and optimum amount of 2.5 g with initial metal ions concentration of 10 mg L^-1.Different isotherm models, namely Langmuir, Freundlich, Temkin and Dubinin–Radushkevich were used to analyze the investigational data, and the models parameters were evaluated. The maximum removal capacities (Q_max) estimated by Langmuir isotherm were 0.276 and 0.171 mg g^-1 for Ni^{2 +}and Pb²⁺, respectively. Furthermore, the kinetic studies proved that alga has poor fit by pseudo first-order model while they have a good fitting with pseudo second-order model. In addition, the applications of alga to remove pb²⁺ions from seawater and wastewater were investigated under optimization conditions.

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