Investigation of adsorption kinetic and isoterm of some heavy metals from aqueous solution by kaolinite

VI SUMMARY In this study, the removal of some heavy metals (MnS04,CoS04, NİSO4, C11SO4) from aqueous solution was investigated by kaolinite adsorbent. Equilibrium contact times of the heavy metals were determined for 2 hours. Adsorption rate, constants were found out at 25 °C as 0.0012 min"1, 0.0024 min l, 0.003 min"1, 0. 0051 min'1, and at 40 °C as 0.0019 min'1, 0.0038 min"1, 0. 0085 min'1, 0.0090 min", respectively by kaolinite. It was seen that adsorption.isotherms of this heavy metals fitted to Langmuir adsorption isotherm. Cm constanst of the Langmuir equation were found at 25°C as 0.446 mgg _1, 0.919 mgg -1, 1.669 mgg ~\ 10.787 mgg _1, and 40 °C 'at as 0.431 mgg ~\ 1.470 mgg -1, 2.79 mgg _1, 11.037 mgg-1 respectively, b constants were seen at 25 °C as 0.067,0.108, 0.112, 0.155 and 40 °C ' as 0.142, 0.167, 0.240, 0.348 respectively. According to these adsorsivity parameters used for these heavy metals on kaolinite Cu+2 > Ni+2 > Co+2 > Mn+2 respectively were found.