Remoción de Pb (II), Ni (II) y Cr (VI) en soluciones acuosas usando matrices modificadas químicamente

In this paper was studied the use of low-cost materials obtained from plants remains and modified organic matrices to replace the use of conventional methods for removal of heavy metals. So avoiding subsequent problems such as the generation of chemical sludge, and creates an alternative use for materials considered as waste. It is well known that the presence of some of the active components in these materials allow them to efficiently capture metal ions, however, it was found that other factors like pH of solution and concentration of metals also influence this process. In general, acid treatment and a subsequent transformation of materials to active carbon increases sorption capacity. Also, it is the pseudo second order model and the Langmuir isotherm that are the equations most used to describe kinetics and the adsorption behavior.