Abstarct Laed(ii)

BIOSORPTION OF LEAD(II) CATION BY GREEN ALGAE Spirogyra subsalsa BIOMASS Mawardi 1), Edison Munaf 2), Soleh Kosela 3) , Widayanti Wibowo3) 1) Laboratory of Analytical Chemistry, Faculty of Mathematics and Science, State University Padang, Padang 25131, Indonesia 2) Laboratory of Analytical Environmental Chemistry, Faculty of Mathematics and Science, Andalas University, Padang 25163, Indonesia 3) Laboratory of Chemistry, Faculty of Mathematics and Science, Indonesia University, Depok 16424, Indonesia Abstract In this research was studied caracteritation of biosorption of heavy metal cation specially Pb2+ by green algae Spirogyra subsalsa biomass, that was take from Batang Air Dingin River, Padang City. Several variables affecting the degree of heavy metal ions biosorption by algae biomass, i.e: solution pH, biosorbent particle size, affect of heated biosorbent, contact time (rate of sorption), and initial cations concentration. The biosorption of Pb2+ increase rapidly with pH in the range of 2,0 to 3,0; the maximum sorption was seen at pH 4.0. Also, increasing the metals concentration increased the final metal uptake. At a sufficiently high cations concentration of 200 mg/L for cations Pb2+ and the Langmuir adsorption isotherms were used to fit the experimental data. The maximum biosorption capacity was estimated to be close 9,04 mg Pb2+ per gram dry biomass. The biosrption process of Pb2+ cations was a rapid process, wherein 87,5% of the final uptake value occur within the first 5 minute of the contact time. Generally, particle size of biosorbent, rate of shake, and heated of biosorbent relatively little affecting the capacity of biosorbent, (3 - 10 %). Keyword : biosorption, S. subsalsa, lead(II), Langmuir adsorption Corresponding Author: E-Mail: [email protected]