Lead Ion Uptake By Sodium Alginate And Calcium Alginate Film:A Comparison Study
作者单位：Department of Chemistry University of GuanajuatoL.de Retana No.5Guanajuato 36000Mexico Department of Environmental EngineeringNagaoka University of TechnologyNagaokaNiigata 9402188Japan
会议名称：《2012 International Congress on Informatics,Environment,Energy and Applications(IEEA 2012)》
会议日期：2012年
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
基 金：supported by the JASSO program of the government of Japan and CONACYT from the government of México
关 键 词：alginate films lead uptake sorption
摘 要：Lead ion (Pb(II)) uptake from aqueous solution by two different alginate compounds was investigated. Sodium alginate (Na-Alg) and calcium alginate (Ca-Alg) films were successfully fabricated from the commercially available sodium alginate powder. The Pb(II) uptake performance by Na-Alg and CaAlg films was evaluated against time in a 10 mM Pb(II) solution’s batch sorption system. Ca-Alg film was consistently showing a better Pb(II) uptake performance as compared to Na-Alg film within the investigated duration. Further evaluation on Ca-Alg film was carried out at lower Pb(II) concentrations, i.e. 1 mM and 0.1 mM, the Ca-Alg film showed the best performance in 0.1 mM Pb(II) solution at a uptake rate higher than 98%. The Pb(II) uptake performance of Ca-Alg film was also compared with that of the conventionally fabricated Ca-Alg beads. This result indicates that with the same amount of Ca-Alg used, the film shows approximately three time better Pb(II) uptake performance compared to the beads. The results reported herein indicates that Ca-Alg compound is an effective and efficient biosorbent, furthermore the Pb(II) uptake performance is influenced by the sample fabrication method as well, i.e. film versus bead, which contributed to the overall surface area.