The purpose of this paper is to obtain and characterize the chicken eggshells results as domestic waste in order to use them for blocking lead and cadmium in acid soils contaminated with heavy metals. Practically, was determined the effectiveness of fixing lead and cadmium in moderately acidic soil, which contains amounts of lead and cadmium above the intervention level, in the case of using eggshell powder (EGP) in proportions of 1 and 5 percent (compared to soil). The obtained results show different values of the effectiveness of blocking Pb and Cd, depending on the amount of eggshell used and the nature of the metal. Higher values of effectiveness have been reported in the case of using of 5 percent eggshell powder. Comparing the efficiency of using EGP it can be seen that the method is more efficient in case of blocking cadmium. Also, the use of the eggshells powder contributes to reducing the acidity of the soil. The obtained results recommend the use of eggshells for Pb and Cd fixation from acid soils contaminated with such heavy metals contributing to the soils rehabilitation, unsuitable for growing plants. Superior utilization of eggshell waste can be an efficient way of neutralizing them from agro-industrial activities.

eggshell waste, eggshell powder, calcium, soil rehabilitation, lead, cadmium, effectiveness

environmental engineering

Presentation: poster