THE MIXTURE OF WATER HYACINTH PLANT AND CHITOSANBENTONITE AS A MODIFIED ABSORBENT FOR PB(II) REMOVAL IN LIQUID WASTEMOONDRA ZUBIR, ZAINUDDIN MUCHTAR, HAFNI INDRIATI NASUTION, RICKY ANDI SYAHPUTRA AND WASIS WUYUNG WISNU BRATAAbstract Water hyacinth and chitosan bentonite have potential as an absorbent material of heavy metal by higher stability, cheaper and easier in their synthesis. In this study, we combined use of water hyacinth and chitosan bentonite with a ratio of 1:3, 2:2 and 3:1 as a function of Pb(II) removal. Pb(II) was adsorbed after 5 minutes as 2.45, 2.47 and 2.50 mgg-1, respectively. These adsorption amount were higher than each adsorption of Chitosan-Bentonite and Water Hyacinth. Chitosanbentonite adsorbed Pb(II) after 10 minutes as 1.87 mgg-1 and water hyacinth after 20 minutes contact time as 1.22 mgg-1. Presence of more chitosan-bentonite ratio in mixture adsorbent induce strong interaction of functional groups of chitosan-bentonite with Pb(II) ion. It also supported by BET analysis which chitosan-bentonite have higher BET surface area and micropore volume. Instead, water hyacinth have bigger pore size than chitosan-bentonite. Modification the mixture of chitosan-bentonite and water hyacinth become a new strategy to reduce the usage of chitosanbentonite as renewable natural resources and increase the usage of water hyacinth which produce higher capability to adsorb Pb(II). |