استخدام نبات عدس الماء Lemna spp لإزالة بعض الملوثات من مياه الصرف الصحي

الملخص EN

Study examines the possibility of using one local aquatic plants called Lemna spp in wastewater treatment (sewage) to the city of Nasiriyah by removing the heavy elements and nutrients (nitrate and phosphate) and some of the qualities such as dissolved oxygen and biological oxygen demand .So plant treatment experiments for the pollution of water with concentrations (1,3,5,7) as a part per of a million for the each of the following elements (nickel, iron and zinc) where lentil were grown in above the mentioned concentration for four days, the traits were measured daily.

where results showed that the dissolved oxygen values increases throughout the time period, ranging between values (2.3 – 1.4) and (2.8 – 1.6) and (2.4 – 1.6) mg / L for each of the basins are in (nickel, iron, zinc) respectively, as was less values on the first day while higher values on the fourth day, and the results showed that values during the treatment period and ranged between (116 - 76) and (136 - 82) and (126-76) mg / L for each of the basins are in (nickel, iron, zinc ) respectively, where values were high on the first day and then began to decline during the four days of the experiment, and the results also showed low values of each of nitrates and phosphate over the treatment period.

The results showed that the Lemna has the ability to draw the heavy elements out of the medium concentrations living in.

The most important thing is that the concentrations of heavy metals each of nickel, iron and zinc decreases during treatment time and this indicates the fact that Lemna has the ability to decrease the organic pollutants and heavy elements in the sewerage .