اسم المؤلف:
منى محمد نجیب
اسم المشرف:
حسين يوسف خلف الركابي
المستخلص:
recently Iraq where suffer from several crisis including diminished quantity and deteriorated quality of water resources, specially in southern provinces. This study was designed to show the extent of using non - traditional water resources such as sewage after its treatment with local alternative chemicals and using the resulting water in agriculture sector. Samples were collected from the terminal tank of waste water station in Al Nasiriyah ( Alhindia station) according to the criteria of United States Environment Protection Agency (USEPA, 1977) regarding the sewage properties including pH, EC, total dissolved solid(TDS), total suspended solids( TSS), CO2, Mg+2, Ca+2, Na+, CaCO3, Cl - , PO4 - , NO3 - , chemical oxygen demand ( COD), biological oxygen demand (BOD5). Moreover, we easured three trace elements ( Pb, Ni, Cd) as well as sodium adsorption ratio( SAR) and biological properties and bacterial contamination with fecal coliform bacteria. Physicochemical analysis of both sewage and tab water was performed. It was found that pH values were 7.37 and 8 for sewage and tab water , respectively. While the electrical conductivity for tab water was 8.01 ds / m compared with that of sewage water which was only 1.76 ds / m . TDS, TSS and CO2 for both sewage and tab water were (3780, 723) and ( 800 , 320) and (5.41, 1.23) mg/ L respectively. Results also showed that sewage water contain high concentrations of cations and anions as compared to tab water. Magnesium concentration was 469.42mg/L in sewage water and 100.1mg/L in tab water while calcium was 581.2mg/L in tab water and 60.8 in sewage water. Sodium concentration was 662.86 mg/L in sewage water and 186.3mg/L in tab water. On the other hand, water hardness and alkalinity were (3300 , 280) mg/L for sewage water and ( 2.40, 66.49) mg/L for tab water respectively .Results of this study also showed an increase in the concentrations of some ions in crude sewage water with respect to tab water. Concentrations ofchloride,phosphate,sulphate and nitrate in sewage water sample were 2496.31 Mg/ L,1.6 Mg / L , 1976 Mg / L ,3.67 Mg / L and for tab water were 226.8,0.7,108.48,0.6 Mg/L, respectively. Fecal coliform number was 2600 cell/100 ml in sewage sample and only 6 cell/ 100 ml in tab water. BOD5 andCOD values were 18, 167 Mg/ L for sewage water and 2.0, 6.0 Mg/L for tab water respectively Heavy elements also found to be elevated in sewage with respect to tab water , where the concentrations of Pb,Ni& Cd in sewage sample were 2.8, 0.8 & 0.004 Mg / L , while they were 0.09, 0.001 &undetected in tab water, respectively. On the other hand, sodium adsorption ratio SAR in sewage samples was 7 and in tab water was only 0.48.Laboratory experiments dealt with the following : 1 - It was used sand filters as a primary processing for waste water to remove pollutants prior to pass it through used filter upon incubating it for 14 days . 2 - in this study , it was selected four types of filters to remove contaminants and improve the quality of water is (water plant Ceratophyllum demersum, wood sawyer , , coal and Cladophora glomerta ). As it was used as filters either aprimary step in processing waste water through passing these waters as aby - pass step these waters on sand filter was used in this studay .3 - chemical , physical and biological characteristics of waste waters were studied upon passing it on the under - studying filters and also estimated the efficiency of removal Removal efficiency (%) of the components. 4 - Used of Some international Standerds and Iraqi specifications to evaluate the quality of water befor and after to pass it on filters for irrigation purposes. Some of criteria Such as (Kloke, 1980; WHO, 1995; US EPA, 1996; European Society, 1996 and Awasthi, 2000. ) were used to in the evaluation of soil contamination with heavy metals.This study reached to the following results : .The study concluded accrediting wooden sawyer + sand and water plant in recycling and reforming waste water and its capacity to remove pollutants, evaluation of quality of waste water and the treated water after passing through the filters under studay results indicated that all types of water inclusive the class (C4S1 ) which means high salinity water with afew of sodium element according to the classification of Laboratory US salinity. and water to cause toxicity problem in the study, and showed It results that candidates contributed to the removal of pathogenic bacteria from the treated water, and irrigation with waters passed through ceratophyllum dermersum L and sand filter leading treatment gave the highest dry to plant maize and two shoot and root weight, Result of statistical analysis showed that soils characteristics had a significant effect on of dry weight, concentration and quantity absorbed heavy elements in sections shoot and root to plant maize, was not for irrigation with treated wastewater impact on soil pollution with heavy metals and the results showed that the soils environmentally safe after relying on the Organization standards (WHO) and the American Environmental Protection Agency (US EPA).
