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- W2313748462 abstract "The kinetic s and eq uilibri um of thc adso rpt ion of Hg( lI ) by humi c acid coate e! kaolin (HA-kaolin ), a sy ntheti c so il , are studied. The parameters stu died arc: pH, ini tial metal ion co ncen tra ti on, particle size of th e HA-k ao lin and temperature. The upt ake of Hg(l l) increases as the pH is increased and rea ches a maximum of 82 .8% for the in iti al concentrati on of 10 mg/L at pH 9.0. The applicab ility of ex tern al mass transfer and intrapani cle mass tran sfer diffusion mode ls has been investigated. The kineti c parameters such as mass tran sfer coefficien t, diffus ion ccefTi cient and intrapa rti cle ra te constant as a func tion of initial metal concent ra ti on , part icle size of the sol id and tem peratu re have been calculated fo r predicting the nat ure of adsorpt ion. The intraparlicle diffusion of metal ions through pores in th e HA-kaolin is found to be the main rate li miting step. Temperaturc dependence indi cates th e endoth ermi c nat ure of th e process. Thc signi fi cance of the two linear relati onships ob tai ned by plott ing th e data acco rding to th e conventional Langmuir equation is di sc ussed in term s of the binding energies of the two populati on sites involved whi ch have a widely differing affi nity for Hg( lI ) ion s." @default.
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- W2313748462 date "1999-10-01" @default.
- W2313748462 modified "2023-09-23" @default.
- W2313748462 title "Adsorption Characteristics of Hg(II) on Humus-Kaolin Complex: Kinetics and Equilibrium" @default.
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