Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

Abstract

Green-based materials represent a new promising class of ecofriendly and economic adsorbents. Herein, nano zero-valent iron supported-lemon derived biochar (NZVI-LBC) was prepared for the first time and examined in the adsorptive removal of methylene blue as a model pollutant. Different characterization tools were used to ensure the successful fabrication of the NZVI-LBC composite including FTIR, XRD, TEM, XPS, VSM, BET, and zeta potential analysis. It was found that the fabricated NZVI–supported biochar composite attained the propitious adsorbent criteria since it provided a supreme efficient adsorption process at short time. The reckoned maximum adsorption capacity of MB onto NZVI-LBC reached 1959.94 mg/g within merely 5 min. The obtained data clarified that the adsorption process of MB onto NZVI-LBC fitted pseudo 2nd order kinetic model and Freundlich isotherm model. Besides, the adsorption process of MB onto NZVI-LBC was found to be endothermic in nature. In addition, NZVI-LBC composite revealed an excellent adsorption behavior even after seven cycles. The concrete results reflect the potentiality of NZVI-LBC composite to be a superb candidate to remove cationic pollutants from their aqueous solutions. Graphical abstract

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

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Sulfonated graphene oxide impregnated cellulose acetate floated beads for adsorption of methylene blue dye: optimization using response surface methodology

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Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

“…For the past two decades, researchers around the globe gave more attention to treating dyes in wastewater via adsorption processes. Due to its design flexibility, lack of treatment byproducts, ease of service, high efficacy, reusability, low cost, ease of operation, and insensitivity to biological materials in aqueous settings, the adsorption approach is the most widely used remediation method (Abd El-Monaem et al, 2022;Eltaweil et al, 2022). Among all types of adsorbents, activated carbon (AC) derived from biomass and agricultural wastes has gained popularity due to two main reasons-being economically feasible and having excellent adsorption performance.…”