ADSORPTION BEHAVIOR FOR Cd(II) AND Pb(II) REMOVAL FROM AQUEOUS SOLUTION BY DIFFERENT ADSORBENTS

• Main Authors: Chin-Son Lin, 林錦松
• Other Authors: Rong-Chi Wang
• Format: Others
• Language: en_US
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/71350877189619502465

碩士 === 大同工學院 === 化學工程研究所 === 87 === ABSTRACT This research was focused on the adsorption behavior of divalent cadmium and lead onto three species of adsorbents such as activated carbon, aluminum oxide, and bentonite. Single component equilibrium data in the aqueous solutions with different pHs and temperatures determined by batch tests. The adsorption isotherms showed that the data were fit well with Langmuir isotherm model and adsorption mechanism could be described by surface complexing model. The results indicated that adsorption capacity was a strong function of pH and temperature for all cases. In addition, the surface structure and electric behavior of adsorbents also have a significant effect on the adsorption processes. For all adsorbents, the bentonite has the highest removal efficiency than the others and the adsorption capacity of divalent lead was larger than that of divalent cadmium.