Research Journal of Chemistry and Environment (RJCE)
Biosorption of lead by biomass of dried Sargassum crassifolium
(This article belongs to Vol - 13, Issue - 03)
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One of the heavy metal pollutants emerged highly concentration in the watershed of Jakarta city, Indonesia is lead (Pb). Removal of lead using a biological method by using macroalgae is an efficient method from wastewater. Sargassum crassifolium is the original species of macroalgae from Indonesia that was used in this study to analyze the ability of adsorption of lead from aqueous solution and industrial wastewater. Samples collected at Pari and Pramuka Island, Seribu Island, North Jakarta, Indonesia were studied to adsorb lead with a variety of adsorption time of 10, 20, 30, 45, 60, 90 and 120 minutes and a variety of initial concentration of lead, 200, 300, 400,500, 750 and 1000 mg/L, using duplicate assessment at the pH 5. The removal of lead from the industrial wastewater using macroalgae S. crassifolium should further be analyzed. The highest lead removal was 98.4 in the concentration of 1000 mg/L achieved within 60 minutes. The binding of lead by S. crassifolium followed the Freundlich model (R2 = 0.976) with the maximum adsorption capacity was 55.56 mg/g. The removal of lead from wastewater was 75% for 60 minutes contact time with the final concentration was 0.01 mg/L under the safe limit for the environment. Thus, S. crassifolium has a high prospect as an adsorbent of heavy metals in industrial wastewater treatment.