44.  Investigations on the Usefulness of Thermal Power Plants Ash for Lead Adsorption

Authors: L.Tofan, C. Paduraru, L. Bulgariu


Abstract:

One of the interest subjects, in the last time is to develop new applications of fly ash, produced in growing quantities by burning coal in all coal-fired power stations and other industrial sources. In this context, the sorption of some pollutant species (heavy metals, organic compounds, dyes, etc.) on different kinds of fly ashes has been intensively studied. In this study, we have investigated the sorption of lead ions on an energy pit coal fly ash, a massive waste of a thermal power station in Iasi, Romania. In order to establish the optimum conditions of lead ions sorption on fly ash, the influence of experimental conditions (initial solution pH, metal ion concentration, contact time) was studied at room temperature. The obtained results have show that the optimum pH range for the lead sorption is 4.5 5, when the sorption percent is higher than 95 %.


Keywords: fly ash, lead, sorption, isotherm, kinetics

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