Environmental exposure to toxic heavy metals is one of the main critical issues on environmental and public health. Heavy metals are common pollutants in aquatic ecosystems, which are particularly susceptible and often final receptor of heavy metals. Phytoremediation with aquatic plants is a new, effective and inexpensive method for improving water quality and wastewater. In this study, Lead and Cadmium (50ppm) of industrial water polluted were removed by the aquatic plant, Ceratophyllum demersum L., as grinded and crushed. Results showed that grinded plant was the best in removing Lead and Cadmium than crushed plant, so, removing concentration of Lead by Ceratophyllum demersum L. grinded and crushed were (38, 37.8, 37.5, 33.1 and 30.8), (23, 22.5, 22.5, 18.4 and 12.2) ppm and removal percentage (76, 75.6, 75, 66.2 and 61.6), (46, 45, 45, 36.8 and 24.4) % at flow rate (5, 10, 15, 20 and 25) ml/ min respectively. Whereas, removing concentration of Cadmium were (29.5, 29.5, 30, 22.5 and 14.4), (13, 12.5, 12.5, 8.4 and 2.2) ppm and removal percentage (59, 59, 60, 45 and 28.8), (26, 25, 25, 16.8 and 4.4 Adsorption column preparationGlass columns used with a diameter (7 cm) and (50 cm) length filled with grinded and crushed C. dermersum plant. Filter paper was put at the end and the beginning of each column. The two columns are joined with container (5) liter capacity of each, in order to feed the column with polluted water with (Lead and Cadmium) at a flow rate (15ml/min) of first container while the 2 nd for aggregation water after recycle in column at approximately (5,5hrs) impairment time.The biological treatment system design(designed bioremediation system):The form of (Figure 1), which were established in the laboratory for the treatment of water contaminated with heavy metals using a glass column container for each of them grinded and crushed C. demersum L separately. The system is composed of: a. Glass column with a diameter (7cm) and filled with the flora C. demersum L. crushed or grinded (50cm length).b. Iron holder to install column.c. Heavy metals' polluted water with heavy elements tank, (5L) capacity.d. Water tank after treatment (5L) capacity.e. Connecting pipelines; to connect the parts of the system.f. Valves to regulate the flow rate of the contaminated water. Results and Discussion Removal of lead by grinded and crushed of C. demersum L:Removal of lead element with concentration (50 ppm) by grinded and crushed plant C. demersum L. from polluted water by using adsorbent column with different flow rate ranged (5, 10, 15, 20 and 25) ml/min. Results shown that the best removal of a vital element for lead by using grinded C. demersum L. which was obtained at flow rate (5, 10 and 15) ml/min, with percentage of removal (76, 75.5 and 75) %, respectively, whereas, the crushed plant was a decent efficiency in removal the Lead with (46, 45, 45, 36.8 and 24.4) % at flow rate (5, 10, 15, 20 and 25) ml/min, respectively (Table 1) (Figure 2). Phytoremediation, a method to remove pollutants from th...
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