Thus in order to address this problem the tarlac

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Unformatted text preview: in the city government of Tarlac. ENV-P12 BIOSORPTION OF HEAVY METALS (Cd, Pb, Cu AND Zn) FROM AQUEOUS SOLUTION BY MARINE ALGAE BIOMASS Ching Mei Lan and Marcus Jopony School of Science and Technology, Universiti Malaysia Sabah, Locked Bag No. 2073, 88999 Kota Kinabalu, Sabah, Malaysia E-mail: newml@hotmail.com Continuous input of wastewater containing heavy metals can cause adverse inputs to the aq uatic ecosystem. It is therefore important that this wastewater be treated prior to discharge. Biosorption using algal biomass is one of the alternative methods recommended for this purpose. In this study the ability of marine algae (Sargassum sp.) biomass in the removal of Pb, Cd, Cu and Zn from aqueous solution was investigated according to batch adsorption method. The residual metal concentration in solution was determined by atomic spectrophotometry (AAS). The results showed that the adsorption of all the metals was rapid and reached maximum at about 30 min of contact time. Equilibrium was attained at 120 min with more than 90 % of heavy metals being removed from solution. The adsorption of each metal increase as the initial concentration of heavy metal increase from 10 to 50 μg/mL. The equilibrium adsorption data fitted better to Freundlich isotherm compared to Langmuir isotherm. In term solid-solution ratio, percentage of adsorption increase slightly with the increase in biosorbent dosage (0.1 to 1.0 g). Similarly, the adsorption of heavy metals increased with the increase of pH from pH 2 to pH 4. However, no significant increase in adsorption was observed beyond pH 4. 108 3rd ICYC 2010 Universiti Sains Malaysia ENV-P13 23rd-25th June 2010 ELECTROGENERATIVE PROCESS FOR THE RECOVERY OF LEAD USING A BATCH CELL Nurul Hanis Mohd Ramalah, Nur Fatin Zakaria, Fatemeh Salehin Karoonian, Mohammad Etesami and Norita Mohamed School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: mnorita@usm.my A batch electrochemical reactor operating in an electro...
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