PRELIMINARY RESEARCH REGARDING THE USE OF EGGSHELL POWDER FOR THE REHABILITATION OF SOILS CONTAMINATED WITH LEAD AND CADMIUM PUBLISHEDB. COZMA1, V. MĂRĂZAN1, Iasmina Madalina ANGHEL2, Antoanela COZMA1, Hortensia RADULESCU1 1University of Life Sciences “King Michael I of Romania”, 300645, Timişoara, Romania 2Materials and Manufacturing Engineering Department, 300222 Politehnica University of Timişoara email@example.com
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