Adsorption of divalent lead from metallurgical effluents using pillared bentonite

Abstract

The search was developed with effluents from the metallurgical Pilot Plant of Yauris, With the intention of lowering the level of contamination with heavy metals, especially lead, due to the damage, that it caused to the ecosystem.

This paper the optimum conditions of time, temperature and pH were determined for the absorsium of lead the natural betonite was pillared with solution of polihidroxipipo limerick coming from mitupampa, Chongos Alto in the Province of Chupaca, It was analyzed by x – Ray Diffraction (XRD) presenting high content of mont morillomite.

The natural and pillared betonites presented specific areas of 80.52 m2/g and 137 m2/. That was determined by the absorptions of metlylene and a cation of exchange capacity (CEC) of 87.25 and 71.25 meq/100 gr. Betonite respectively. The optimums conditions took place at a time of removal of 5 hours 30 OC of temperature and pH5 the percentage of lead inionic state 99,085 % achieving a performance of 5.39 gr pb/g of pillared. While evoluting the removal of the metal in the sample of the metallurgical affluent it was registered 62,55 % a quantity lower to the obtained with the solution in white of Pb, caused to the presence of other metals, that act out as interferents.

For this reason, we had to carry out several stages of removal reacting a final concentration of lead of 0,265 ppm, value that results less to the maximum permissible limits.