Abstract
This article provides an overview of the role of raw and burnt date pits as bio-waste for heavy metal removal. In recent years, many studies on the adsorption properties of various low-cost adsorbents, such as agricultural waste and activated carbons based on agricultural waste, have been published. This review summarizes recent research demonstrating the utility of raw and modified date pits biomass-based adsorbents in the removal of heavy metal pollutants from wastewater. Additionally, the chemical compositions, the derived activated carbon, and the proposed mechanism of heavy metal ions were discussed. It thoroughly showed how essential variables including pH, adsorbent dosage, initial metal ion concentration, physical and chemical properties, and temperature affect the adsorption of heavy metals. The significant application of date pits as a bio-adsorbent of heavy metal ions was demonstrated. According to the literature, date pit-based adsorbents are the most promising adsorbents for removing toxic materials because they adsorb heavy metals from aqueous solutions with high capacity in a short period.
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