Release Cumulative Power between (Ceratophyllum demersum L) and )Hydrilla verticillata (plant to Phytoremediation lead in the polluted water aquatic ecosystem

Abstract

This study was conducted in the laboratory "to identify the ability of the plant C. demersum   and Hydrilla verticillata  to remove heavy metals from water which is lead element and the concentration of 20 mg.L^-1  was used for a period of twenty-eight days for each plant, and plant efficiency removal of heavy metals from water was estimated as percentages of removal and the results showed that the plant concentrates the elements in its tissues in  large quantities. And significant differences were found between the concentrations on the third day until the end of the twenty eighth day of the experiment for both plants at the level of the probability P ≤ 0.05. The study indicated that the plant Hydrilla verticillata has more vital capacity compared to the plant C. demersum   and the amount of the remaining element indicates that the plant Hydrilla verticillata has the ability to intake a larger amount of the element in its tissue more than C. demersum  so the plant can be used in the biological treatment of polluted water with heavy metals as the plant ratios showed high removal percentage of the lead element, was between (79.8 -31.1)% for the concentrations studied during the days of the experiment respectively for the plant Hydrilla verticillata, while the removal ratios of the lead element ranged between (7.87 - 29.2%) for the concentrations studied respectively, after the twenty-eighth day of the experiment for the plant C. demersum the concentrations of the elements were measured after (3, 7, 14, 21 , 28 ) days of the experiment for each concentration. As noticed during the experiment that the leaves of the plant C. demersum  began  wilting faster at the concentration of 20 mg L ^-1. compared to the plant Hydrilla verticillata