鉛化合物を用いたアンチモンイオンの吸着除去

概要

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Removal of heavy metal ions from the waste effluent is considered very important to maintain the environment free of any pollutants. We have developed a Pb-based compound that efficiently removed Selenium and Molybdenum from artificial wastewater. In this paper, we report the results of the study carried out to determine the applicability of this Pb-based adsorbent for the removal of Antimony. The following were concluded from the Sb ion adsorption study using Pb-based compound.(1) The Pb-based compound showed the ability to adsorb Sb(III) ions from an artificial wastewater containing Sb ions. The maximum Sb(III) ion adsorption capacity of Pb-based compound was determined to be 0.94 kg·kg-1 under the following experimental conditions: solution pH 4, Equilibrium concentration of Sb(III) ion of 35 mg·dm-3, and agitation time, 2 hours.(2) Based on XRD and SEM analysis of the Sb-ion adsorbed Pb-based compound, the presence of Pb(OH)Cl was identified. Furthermore, elements such as Sb, Fe, Cl and Pb were found evenly distributed on the surface. The Sb ion adsorption was pH dependent and for pH less than 8, more Sb(V) ions were adsorbed than Sb(III).(3) Though the dissolution of Pb ions in the alkaline region was very low compared to the acid region, the concentration was above the wastewater permissible limit. Thus, the Pb ion concentration was brought below 0.1 mg·dm-3 using zeolite.
社団法人資源・素材学会の論文
2003-03-25