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421.
Mohamed Badr A. Fattah I. M. Rizwanul Yousaf Balal Periyasamy Selvakumar 《Environmental science and pollution research international》2022,29(31):46438-46457
Environmental Science and Pollution Research - The COVID-19 pandemic not only has caused a global health crisis but also has significant environmental consequences. Although many studies are... 相似文献
422.
Mona Mohamed H. El-Khodary Gihan M. Abdel-Halim Khaled Y. Omran Nahla E. Abd El-Aziz Karolin K. El-Saidy Salwa A. 《Environmental science and pollution research international》2022,29(7):9971-9989
Environmental Science and Pollution Research - Bivalves are considered a main consumed matrix for coastal communities worldwide and classified as hyperaccumulators of pollutants. The present study... 相似文献
423.
Khomri Zine-eddine Chabaca Mohamed Naçer Boudibi Samir Latif Sarmad Dashti 《Environmental monitoring and assessment》2022,194(7):1-20
Environmental Monitoring and Assessment - Downstream water pollution resulting from anthropogenic pressures on upstream water can cause conflicts, especially in transboundary rivers basins. This... 相似文献
424.
Sultan Serageldeen Eldamarany Nahla Mohamed Ibrahim Abdelazeem Mohmed Wael Fahmy Hanan Ali 《Food and environmental virology》2022,14(3):280-294
Food and Environmental Virology - A total of 1007 samples (910 fecal droplets and 97 cloacal swabs) were collected from 14 species of migratory wild birds in most wetlands during 3 successive... 相似文献
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Kumar Pandion Sivaperumal Pitchiah Manigandan Vajravelu Rajaram Rajendran Hussain Mohamed 《Environmental science and pollution research international》2021,28(7):8151-8167
Environmental Science and Pollution Research - This study aims to estimate anthropogenic sources of pollutants such as heavy metals that pollute or poison the commercial marine finfish and... 相似文献
427.
Subsurface-flow constructed wetlands (CWs) wastewater treatment typically results in satisfactory organics removal. However, the removal of nutrients, particularly nitrogen, is often unreliable, and typically less than desired, and nitrogen transformations in wetlands systems are not well-understood. The principal objective of this study was to establish a basis for quantification of nitrogen transformations through subsurface flow CW systems. Actual performance data from a full-scale facility located near Lincoln, Nebraska, were used to calibrate a proposed nitrogen transformations model, which, in turn, was used to replicate and predict the wetlands performance. To realize this objective, a compartmental analysis technique, which uses a set of differential equations and nonlinear optimization numerical methods, was used for solving nitrogen transformation rates and for predicting wetland performance. The model satisfactorily reproduced the mean effluent concentrations for organic nitrogen, ammonium-nitrogen, and nitrate-nitrogen, but with lesser accuracy with respect to peak high and low effluent concentrations. Nitrogen mass balance in the wetland was used to identify likely nitrogen transformation pathways. Generally, it was found that approximately one-third of the influent nitrogen mass was removed through nitrification and denitrification, one-third was removed through vegetative assimilation, and the remainder was discharged in the wetland effluent. 相似文献
428.
This work focuses on four marine sites of the Mediterranean Sea, north of the Nile Delta, Egypt. Surface-water samples were collected seasonally during 2003. The aim of this study is to assess the levels of some dissolved trace metals (Fe, Mn, Zn, Cu, and Pb) in two environmental conditions. The metal concentrations in the coastal zone were in the following ranges: 11.92-30.45 μg l-1 for Fe, 5.79-17.36 μg l-1 for Mn, 0.87-7.80 μg l-1 for Zn, 0.40-1.87 μg l-1 for Cu, and 1.53-10.31 μg l-1 for Pb. In the sites with continental water input (mixing zone), the metals were scattered in the following ranges: Fe (19.72-60.33 μg l-1), Mn (12.63-35.60 μg l-1), Zn (2.67-22.00), Cu (0.83-8.10 μg l-1), and Pb (1.72-29.7 μg l-1). The results for the metal concentrations showed a remarkable decrease in the levels of the different metals going from the estuaries and outlets into the coastal sea water. Generally, the levels of the metals in the two zones are higher than the background levels of the unpolluted area. A comparison of the trace-metal levels in the coastal zone of the Mediterranean Sea north of Nile Delta with the minimal risk concentration (reported by water-quality criteria, WQC) showed a significantly lower content at the coastal area of the Mediterranean sea of Egypt. The study also indicated that the impact of anthropogenic inputs was limited in the distribution of the metals, except that the Pb content was slightly higher in the area of the mixing zone than that reported for WQC. The relationships between the different trace-metal concentrations and the other parameters (salinity, chlorophyll a and suspended particulate matter) were discussed, and the simple regressions between them were evaluated. 相似文献
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