Study on the Effect of pH and Contact Time on the Adsorption Efficiency of Trivalent Arsenic (III) Ions from Aqueous Solutions Using Neem Leaf Powder (Azadirachta indica)
DOI:
https://doi.org/10.65405/zkzqx635Keywords:
As (III), Neem leaf powder, Contact time, PH, Bioabsorption.Abstract
This research involves the preparation of Neem leaf powder (Azadirachta indica) as a biomass-derived biosorbent. The study investigates several physicochemical factors and their correlation with adsorption capacity, with a particular focus on the adsorption mechanism and the efficacy of this low-cost biomass. This approach provides a sustainable solution for the removal of Arsenic (III) ions, aiming to determine effectiveness and advance bioremediation practices. Arsenic contamination represents a major environmental challenge, and the urgent need for viable solutions serves as the primary motivation for this study.
The objective of this study was to evaluate the removal percentage of trivalent arsenic As (III) from aqueous solutions using a series of batch experiments on Neem leaf powder across various pH levels. The study explores the removal process through adsorption, where results indicate that Neem leaves possess a significant capacity for sequestering As (III) ions from aqueous media.
Key parameters examined in this study include contact time and pH. The effects of contact time on arsenic biosorption were studied over a range of 60 to 300 minutes, at different pH values (4, 6, and 9) and a constant temperature of 40°C. The pH levels were adjusted using Hydrochloric acid (HCl) solutions. With a biosorbent dosage of 10 g/L and an initial As (III) concentration of 20 mg/L, the maximum removal efficiency reached 90% at pH 6.
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