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31.
Farhan Muqadas Wajid Abdul Hussain Tanveer Jabeen Farhat Ishaque Uzma Iftikhar Mehwish Daim Mohamed Abdel Noureen Aasma 《Environmental science and pollution research international》2021,28(11):13105-13111
Environmental Science and Pollution Research - Chlorpyrifos (ChF) is an organophosphate pesticide that is widely used in agricultural fields and indoor for controlling pests. Aquatic ecosystems are... 相似文献
32.
The chemical composition and microbiological contamination of well water and Nile River water used for drinking were investigated in localities around Khartoum, Sudan, to present baseline data. The chemical analyses results obtained indicated that public health hazards due to pH, Ca++, CO3??, HCO3?, and NO3? are unlikely in all the samples studied, while Na+ and Cl? ions concentrations in well water warrant some attention. Contamination from organic matter and suspended material is also negligible. Microbial contamination with coliform and fecal coliform is high in surface wells and in the Nile River, but negligible in deep bores, tap water, and mineral water. The logarithm of the colony count ranges from zero for mineral water to 6.8 for water from the White Nile. In addition to drawing further attention to the well water and Nile water used for drinking by a wide sector of the population, the microbial count data for water from the Nile disagreed with the generally held belief that the Nile, being one of the largest rivers of the world, carries no detectable fecal contamination. Our data also did not support the belief that the White Nile is more contaminated than the Blue Nile. 相似文献
33.
Recovery of nickel oxide from spent catalyst 总被引:3,自引:0,他引:3
This study investigates the possibility of recovering nickel from the spent catalyst (NiO/Al2O3) resulting from the steam reforming process to produce water gas (H2/H2O) in many industries. In the extraction process, nickel is recovered as sulfate using sulfuric acid as a solvent. The considered parameters affecting nickel recovery were acid concentration, temperature and time of digestion solid:liquid ratio, particle size and stirring rate. Nickel was to be directly recovered as a sulfate salt by direct crystallization method. The conversion was 99% at 50% sulfuric acid concentration, solid: liquid ratio (1:12) by weight, particle size less than 500 micron for more than 5 h and 800 rpm at 100 degrees C. 相似文献
34.
Anaerobic/aerobic treatment of meat processing wastewater 总被引:2,自引:0,他引:2
The meat processing industry is believed to produce highly polluted wastewater. Analysis of such wastewater indicated that the waste was highly contaminated with organic compounds as indicated by COD (1544mgO2l–1), BOD (646mgO2l–1), and TSS (1155 mgl–1). Moreover, oil and grease concentrations reached 144mgl–1 treatment of raw wastewater using Upflow Anaerobic Sludge Blanket (UASB) followed by Rotating Biological Contactors (RBC) was studied. Efficiency of the UASB for the removal of CODtotal, BODtotal, TSS, and oil and grease was 56%, 56%, 85%, and 58%, respectively. The quality of the UASB effluent barely complies with the regulatory standards for discharging wastewater into the sewerage network. UASB effluent was subjected for further treatment using a RBC unit to improve the quality of the treated effluent for reuse in irrigation purposes. Residual COD, BOD, TSS, and oil and grease, following RBC, was 132mgO2l–1, 40mgO2l–1, 44mgl–1, and 10mgl–1 respectively. The overall efficiency of the treatment units provided good quality effluent. The overall percentage removal of COD, BOD, TSS, and oil and grease was 91.5%, 94%, 96%, and 91%, respectively. Based on the quality of the treated effluent and guidelines recommended for wastewater reuse, it may be concluded that a slight to moderate restricted irrigation is applicable to reuse the treated effluent in the green belt around the factory. Disinfection should be applied to ensure the safety of such a process. 相似文献
35.
Natural radioactivity in farm soil and phosphate fertilizer and its environmental implications in Qena governorate, Upper Egypt 总被引:4,自引:0,他引:4
Samples of phosphate fertilizers and farm soils, taken to a depth of up to 30 cm in cultivated land, were collected over the Qena governorate, Upper Egypt. Activity concentration of background radionuclides such as (226)Ra, (232)Th and (40)K of these samples were determined by gamma-ray spectrometry. The results show that these radionuclides were present in concentrations of 366+/-10.5, 66.7+/-7.3 and 4+/-2.6 Bq/kg for phosphate fertilizers. For farm soil and Nile island's soil the corresponding values were 13.7+/-7, 12.3+/-4.6, 1233+/-646 and 11.9+/-6.7, 10.5+/-6.1, 1636+/-417 Bq/kg, respectively. The radium equivalent activity (Ra(eq)), the representative level index, I(gamma r), and absorbed dose in air for all samples were calculated. The data were discussed and compared with those given in the literature. 相似文献
36.
Hindy KT Abdel Shafy HI Farag SA 《Environmental pollution (Barking, Essex : 1987)》1990,66(3):195-205
Levels of vanadium in air, water, soil and plants resulting from the operation of a cement factory in south Cairo were extensively studied. Results obtained were compared with the level of vanadium in a relatively non-polluted residential area. It was concluded that the studied cement factory is the main source of the element to the adjacent environment. This is essentially due to the fact that this cement factory is using fossil fuels and raw materials that both contain high levels of vanadium without adequate control of the release of pollutants. Continuous release of air-borne dust from the cement industry will increase the level of vanadium in the surrounding environment in the long run. 相似文献
37.
Abdel-Rasoul Gaafar Mohamed Salem Eman Abdel-Azeem Hendy Olfat Mohamed Rohlman Diane Abdel Latif Asmaa Abdel Raheem Elbadry Aziza Saad 《Environmental science and pollution research international》2022,29(25):37804-37814
Environmental Science and Pollution Research - Adolescent females are often environmentally exposed to pesticides by living near agricultural fields, by using pesticides at home, or by having... 相似文献
38.
39.
Allouche Mohamed Nasri Ahmed Harrath Abdel Halim Mansour Lamjed Beyrem Hamouda Boufahja Fehmi 《Environmental science and pollution research international》2021,28(6):6866-6876
Environmental Science and Pollution Research - Meiobenthic nematodes are well-known bioindicators in aquatic ecosystem health programs. However, the explored taxa are still limited and practically... 相似文献
40.
Mahmoud A. Saleh Alaa Kamel Awad A. Ragab Gamal El‐Baroty Abdel Moneim M. Afify Joseph Jones 《毒物与环境化学》2013,95(3-4):429-444
Two hundred ninety‐two mother's milk samples were collected during 1994 from ten Egyptian governorates representing rural, metropolitan, and newly reclaimed desert areas. The samples were analyzed for 14 organochlorine insecticides and metabolites using electron capture gas chromatography and confirmed by gas chromatography/mass spectrometry (GC/MS). The overall samples average showed that the most abundant organochlorine insecticide residues were p,p'‐DDE, α‐endosulfan, β‐HCH and, p,p’‐DDT. Residues in the range of not detectable to less than 14μg/l whole milk were recorded for α‐HCH, heptachlor, heptachlor epoxide, aldrin, dieldrin, endrin endrin aldehyde and p,p'‐DDD. The percentage of samples exceeding the acceptable daily intake for children (ADIs) set by the FAO/WHO ranged from 19% to 44% in all governorates included in the study except the governorate of Minia in which only 2.6% of the samples exceeded the ADI values. The insecticides exceeding ADI values are mostly heptachlor and heptaclor epoxide (ADI = 3.12 μg/1 whole milk). 相似文献