Removal of arsenic from landfill leachate using green coconut fiber.

Arsenic is one of the primary inorganic contaminants found in effluents due to its toxicity and detrimental environmental effects. Clean methods for pollutant removal from contaminated effluents have garnered significant attention, especially those utilizing residual biomass. This study focuses on removing arsenic from leachate generated by landfill effluents using natural green coconut fiber. The adsorption conditions were examined over different periods ranging from 50 to 450 min while keeping the original effluent pH and ambient temperature constant. In an experiment using 5.0 g of coconut fiber per 100 mL of sample, the recommended sorption condition for arsenic occurred after 250 min of contact between the fiber and the effluent at 22 °C and a pH of 8.3. Under these conditions, the arsenic concentration decreased from 0.73 to 0.58 mg L-1, indicating a 20.1% reduction from the initial level. These results highlight the potential of green coconut fiber, a waste product from the food industry, as a natural material for removing arsenic from contaminated effluents.