Evaluation of Lead (II) Removal from Wastewater Using Banana Peels: Optimization Study

Abstract

The response surface methodology was used to investigate the removal of Pb (II) from an aqueous solution using banana peel with varying operating parameters in a batch mode. The central composite design was used to study the interactive effects of the operating parameters (initial concentration, pH of the solution, adsorbent dosage and the particle size). The banana peel was characterized by FTIR which showed the functional groups, while SEM and EDS were used to study morphology and elemental composition. The optimum removal of Pb(II) was 98.146 % at initial concentration 100 mg/L, pH 5, adsorbent dosage 0.55 g and particle size 75 µm. The deviation between the experimental and the model predicted percentage removal was 5.17 %. The analysis of variance showed that the regression model was significant with a low probability and the correlation coefficient R 2 value of 0.9153. The results showed that the biosorption of Pb(II) was highly influenced by the pH and the adsorbent dosage, while the particle size had little effect on the biosorption process.

Arabica-coffee and teobroma-cocoa agro-industrial waste biosorbents, for Pb(II) removal in aqueous solutions

“…Our results are comparable to those reported in the literature for optimal Pb(II) adsorption conditions (pH range between 4 and 6) determined for organic residues such as the carnauba palm (Oliveira et al 2021), banana peel (Afolabi et al 2021), tomato residues (Heraldy et al 2018), and particularly coffee husk and pulp residues (Zaragoza et al 2011) where at pH = 4.25 almost 100% of Pb is removed from solution.…”

Recovery of Banana Waste-Loss from Production and Processing: A Contribution to a Circular Economy

“…On the other hand, lead, a reasonably malleable corrosion-resistant metal, because it melts quickly, has several uses, and is expected mainly in paints and toxic fumes from industries such as metallurgy, mining and construction industries [ 113 ]. It has been shown that through the use of banana peel, removal efficiencies of up to 98% can be achieved with initial concentrations of 100 mg/L, pH 5.0, the adsorbent dosage of 0.55 g and particle size of 75 μm [ 114 ].…”

Polyphenols Content, Chelating Properties and Adsorption Isotherms and Kinetics of Red and Yellow Pomegranate Peels (<i>Punica granatum</i> L.) Towards Lead (II)

“…In fact, a large number of reported studies have been conducted to valorize biomasses as sorbents for heavy metal species from aqueous solutions such as olive stones from olive meal waste waters and apricot shells waste from fruit juice industry, which are potential sorbents for several metal ions [18][19]. Moreover, various plant peels have been used efficiently in the adsorption of different metals such as lead on potato and banana peels [20][21]. Finally, a previous study established that Nigella sativa L. seeds biomass preliminarily defatted as a potential sorbent for lead from aqueous solutions and wastewaters from battery factories [22].…”