Trace metals distribution in fish tissues (Cyprinus carpio and Barbus luteus) and sediments from Al-Msab Alamm River near the center of Al-Nassiriya city.

The present study was conducted to investigate the concentration and distribution of four trace metals cadmium, cobalt, copper and lead, in exchangeable and residual phases of the sediment in Al-Masab Alamm and tissues (gills, liver and muscle) of two important commercial species of fish (Cyprinus carpio and Barbus luteus) during summer season 2010. Also the present study include some physical and chemical properties of this ecosystem. The results showed clear coordination between air and water temperature in all study locations. Air and water temperatures ranged between (34.5-39.31) ºC and (26.22-32.01) ºC respectively. PH, salinity, dissolved oxygen and biological oxygen demand ranged between (7.3-8.6), (4.3-9.01) ‰, (6.0-7.70) mg/L and (2.26-3.25) mg/L respectively. Localized variations were noticed in percentages composition of sediment contents of clay, silt and sand. Total organic carbon ranged between (0.28-1.85) in study stations. The mean concentrations of Cd, Co, Cu and Pb in exchangeable and residual phases as follow Cd (4.22, 0.14), Co (12.40, 19.33), Cu (4.76, 12.71) and Pb (29.21, 1.85) µg/g dry weight respectively. The present study showed a difference in concentrations of studied metal in different tissues of fish, these concentrations varies from one species to another and the tissues of same species showed differences in concentration of studied metals. This due to the nature and the function of the tissue and ability of fish on regulating the level of the metals in their bodies during the uptake and elimination processes.            

Trace metals distribution in fish tissues (Cyprinus carpio and Barbus luteus) and sediments from Al-Msab Alamm River near the center of Al-Nassiriya city.

The present study was conducted to investigate the concentration and distribution of four trace metals cadmium, cobalt, copper and lead, in exchangeable and residual phases of the sediment in Al-Masab Alamm and tissues (gills, liver and muscle) of two important commercial species of fish (Cyprinus carpio and Barbus luteus) during summer season 2010. Also the present study include some physical and chemical properties of this ecosystem. The results showed clear coordination between air and water temperature in all study locations. Air and water temperatures ranged between (34.5-39.31

Estimation of selected heavy metals and bacteria in sludge of wastewater treatment unit at AL-Nassiryia city southern of Iraq

        The present study was concerned to estimation the concentrations of the selected heavy metals (Zinc, Copper, Lead, Nickel and Cadmium) in the sewage sludge, which was collecting  from the wastewater treatment unit from  the center of Al-Nassiriya city during the seasons of the year ( autumn , winter , spring and summer) from October, 2016 to August, 2017. Three stations were chosen to execute this study, station (1): represent the pre-treatment; station (2): represent post-treatment and station (3)  represent after dumping in the river. The results of the present study showed a high concentration of heavy metals in dry sludge was Zinc (91.86) µg/g dry wt. in the (st.1) in Spring season, while the Nickel (5.19) µg/g dry wt. at the (st.1) in Summer. The high concentration of copper (41.20) µg/g dry wt. at the ( st.3) in Winter , and lead was (50.17) µg/g dry wt. at the (st.3) in Winter, and cadmium was (97.20) µg/g dry wt. at (st.2) in Winter. The high concentrations of fecal coliforms was (18000) cells /100 ml at (st.1) in winter, while the high number of total coliforms was (160000) cells/100 ml at (st.1) in winter. According to statistical analysis; The results of the present study showed a significant differences between the concentrations of heavy metals during the seasons of the year at the stations, as well as significant differences between the bacteria at the stations that were studied

Estimation of selected heavy metals and bacteria in sludge of wastewater treatment unit at AL-Nassiryia city southern of Iraq

        The present study was concerned to estimation the concentrations of the selected heavy metals (Zinc, Copper, Lead, Nickel and Cadmium) in the sewage sludge, which was collecting  from the wastewater treatment unit from  the center of Al-Nassiriya city during the seasons of the year ( autumn , winter , spring and summer) from October, 2016 to August, 2017. Three stations were chosen to execute this study, station (1): represent the pre-treatment; station (2): represent post-treatment and station (3)  represent after dumping in the river. The results of the present study showed a high concentration of heavy metals in dry sludge was Zinc (91.86

TEMPERATURE DISTRIBUTION WITHIN THE RISING PIPE IN FLAT PLATE SOLAR COLLECTOR

In the present study, the effect of increasing absorption area by using two different cross-section shapes of rising pipe namely semi-circle cross-section (model -A-) and elliptic cross-section (model -B-) on the temperature distribution of operating liquid within rising pipe of the FPSC is studied numerically and experimentally. Experimental tests are conducted under weather Baghdad – Iraq, while the numerical results are obtained by using Ansys Fluent CFD. The difference between the experimental findings and numerical findings for the average temperature of the water in the tank and the temperature of the operating liquid at exit rising pipe is 8.12 % and 8.36 % respectively. The results have shown that the temperature distribution for all new models higher than the traditional model. Furthermore, model -B- has higher other models under study. Hence, the best model according to the current study is model -B- increase by (2.4%), (2.2%) and (2.5%) regarding the temperature of the operating liquid at the inlet, center, and outlet respectively compared to the traditional model

Application of Sewage Sludge and Its Impact on Soil Characteristics, Including Morphological and Biochemical Properties of Vigna radiata Plant

This experiment was conducted in pots to study the effects of sewage sludge application on some morphological, physiological and accumulation characters of Vigna radiata. The experiment contained the following treatments: control (C) 0 gm sludge/30 kg soil, (T1) 300 gm sludge/30 kg soil, (T2) 600 gm sludge/30 kg soil and (T3) 900 gm sludge/30 kg soil. All sludge treatments showed a significant increase in all morphological, physiological and accumulation characters compared with control. (T2 ) treatment gave a significant increase as compared to other treatments in all morphological characters (height of the plant, leaf area, and total dry weight for shoots and roots). It increased by 34.1 cm, 33.1 cm2, 29.8 gm and 3.3 gm, respectively, compared with the control. T2 treatment also gave significant values in all physiological characters (chlorophyll and protein content) as compared to other treatments and the control treatment, (2.60 μg/gm and 17.7%) respectively compared with the control. T3 treatment showed a higher accumulation of Cd and Pb in all plant parts, the root system showed greater susceptibility to bioaccumulation than the shoot system for both the heavy metals.</jats:p