In this study, ultraviolet (UV), ozone techniques with hydrogen peroxide oxidant were used to treat the wastewater which is produced from South Baghdad Power Station using lab-scale system. From UV-H2O2 experiments, it was shown that the optimum exposure time was 80 min. At this time, the highest removal percentages of oil, COD, and TOC were 84.69 %, 56.33 % and 50 % respectively. Effect of pH on the contaminants removing was studied in the range of (2-12). The best oil, COD, and TOC removal percentages (69.38 %, 70 % and 52 %) using H2O2/UV were at pH=12. H2O2/ozone experiments exhibited better performance compared to the H2O2/UV experiments. The results showed that 20 min was the best exposure time with removal percentages of 89.79 %, 83.33 % and 70% for oil, COD and TOC, respectively, and the optimum value of pH was at pH=8, where the pollutants removal percentages (i.e. 74.48 %, 80 % and 73.33 % respectively for the same previous pollutants). H2O2/ozone experiments showed better removal efficiency than the H2O2/UV experiments.
This study was carried out to determine the possibility of improving the properties of the sand from Kasser Mohaiwir area in Al-Anbar Governorate to obtain sand specifications conforming to the standard sand specification (not exceeding 0.25% loss in acid). This study showed the possibility of obtaining standard sand with loss in hydrochloric acid up to 0.175 and recovery rate not exceeding 80% using mechanical methods without resorting to the use of acid methods currently in production.
This study was carried out to determine the possibility of reducing the iron oxide ratio in silica sand from Ardhumah, an area, (18) km west of Rutba, a city in Al-Anbar Governorate, to obtain sand specifications appropriate for making colorless glasses (not exceeding 0.02 % iron oxide ratio). The reduction process of iron oxide includes three stages; the first stage is magnetic separation to reduce Fe2O3 from 0.092% to 0.040%, the second stage is re-floatation which has reduced Fe2O3 to 0.024%, finally treatment of the sand output from the first and second stage with diluted HCl or H2SO4, this study showed the possibility of obtaining silica sand with a ratio of Fe2O3 up to 0.016%.
This study deals with removal of (Cr and Zn) from industrial wastewater resulted from production processes in the State Company of Electrical Industries (S.C.E.I.). The removal process of these metals includes two stages; the first stage is the electrical precipitation of Cr and Zn metals, where Cr concentrations before and after performing this stage are 262 ppm and 26.6 ppm, respectively, while it is 1865 ppm and 45ppm for Zn. The second stage includes treatment with bentonite clay to remove the remaining concentrations of heavy metals in industrial wastewater to be within Iraqi standard specification for discharging in to river. Concentrations are < 0.1 ppm and < 1.0 ppm after applying this stage. These processes are suggested to be an alternative method to that in the State Company of Electrical Industries which uses the chemical precipitation that produce wastes with high concentrations of chrome and zinc, which stored in containers until discarded.
This study was carried out to determine the possibility of upgrading feldspar from Al-Samawa sand dune deposit containing about 2 % Na 2 O and 1 % K 2 O. Two samples from the same location was tested by screening, employing, washing and disliming followed by magnetic separation then froth flotation by tallow amine acetate as a collector with poly propylene glycol and Ethyl diamine tetracetate (EDTA). The experimental results shows that a concentrate of commercial grade can be obtained in percent 5.54 % Na 2 O and 2.41 % K 2 O with a recovery of about 76.2 % and 77 % respectively.
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