10 trang
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Heavy
Analysis of chemical fractions and evaluation of copper (Cu) contaminated levels in soil samples obtained from a Pb/Zn mining site located in Hich village, Thai Nguyen provinceThe primary objective of this study is to elucidate the chemical speciation of copper (Cu) and conduct an assessment of the magnitude and probability of contamination of Cu in soil samples procured from the Pb/Zn mining, at the Hich village, Dong Hy district, Thai Nguyen province, in order to furnish critical data pertinent to the environmental stewardship of soil resources within this geographical domain.
Potential toxic heavy metal contamination of roadside soilAs the urban area has high population density and intensive anthropogenic activities, there are a great number of sources of heavy metals in cities, placing a considerable influence on human health. Emissions of heavy metals may come from domestic waste, chemical industry and transportation. These emissions have been continuously adding heavy metals to soils and they will remain present for many years even after the pollution sources have been removed. Therefore, it is indisputable that heavy metal concentrations in urban soils are significant environmental issue, and a large number of researches have been conducted all over the world.
7 trang
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Manual HandlingYou can do things to prevent or minimise MSDs as they affect large numbers of people across most industries and occupations and have the potential to ruin people's lives. MSDs also impose heavy costs on employers.
CASE STUDY: In one year a firm lost 373 working days because of manual handling injuries. This cost about £24 000 in wages paid to absent workers. There were also overtime payments and other costs. The introduction of handling aids, manual handling training, and a rehabilitation program reduced days lost to 74 and wage costs to about £5000....
18 trang
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Summary of Environmental Engineering Doctoral Thesis: Research on manufacturing bio-adsorbent (bioadsorbent) from coffee husk to process heavy metals in waterThe research objectives of the thesi: Manufacturing biochar (BC) and activated carbon from coffee husk; Fabrication of biochar/activated carbon composite materials from coffee husk and MnFe2O4 nanomaterials to treat Cr(VI) and Ni(II) ions in water. Clarifying adsorption mechanism and heavy metal ion adsorption model on VLHP from coffee husk.
26 trang
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Luật chính tả trong tiếng Anh (Phần 2)Luật chính tả trong tiếng Anh (Phần 2)
.Với những từ một âm tiết có một nguyên âm và tận cùng bằng chỉ một phụ âm thì ta nhân đôi phụ âm trước (khi thêm) một hậu tố bắt đầu bằng một nguyên âm. Và với những từ hai hoặc ba âm tiết tận cùng bằng một phụ âm theo sau một nguyên âm thì ta nhân đôi phụ âm cuối khi âm tiết cuối được đọc nhấn giọng (stress) (âm tiết đọc nhấn in chữ đậm)....
5 trang
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Water quality prediction using MLP in dynamic environmentWater quality plays an immensely significant role in safeguarding the health of humans and other species on the planet. Polluted water sources can contain harmful substances such as heavy metals, pesticides, bacteria, and viruses, which can pose threats to human health and other organisms. Water quality is also a crucial factor in protecting the environment and sustaining the ecosystems of freshwater and marine environments. Polluted water sources can impact the lives of aquatic animals and plants, causing harm and endangering biodiversity by disrupting the food chain.
11 trang
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Chemical fraction analysis of lead (Pb) in sediment at the gold mining area of Than Sa commune, Vo Nhai district, Thai Nguyen provinceThe objective of this study is to analyze the chemical speciation of Pb in sediment samples from the Than Sa gold mining area to obtain comprehensive information regarding the level of Pb contamination in sediment samples from this area.
9 trang
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Stepwise grafting polyethyleneimine onto silica surface for Cu(II) removalPolyethyleneimine (PEI) is a novel polymer that contains multiple amine groups that are suitable for chelation with many heavy metal ions (HMI). Anchoring PEI onto the surface of a solid substrate has been widely adopted to develop adsorbent materials with the hope of combining the HMI chelating ability of PEI with the heterogeneity of the substrate.
7 trang
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Pollution and potential ecological risk assessment of heavy metals in water bodies in the vicinity of industrial zonesThis research was undertaken to determine the concentrations of heavy metal ions in the surface water and sediment in water bodies that receive wastewater from the Dinh Tram and Pho Noi A industrial zones. The pollution status of the heavy metal ions and their potential ecological risks were evaluated by using the potential ecological risk index (RI) and risk assessment code (RAC).
11 trang
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Red mud & graphene oxide blend as an effective coagulant and adsorbent for the treatment of waste water from various industriesA series of blends consisting of Red mud(RM) varying from 1.5 to 3 g and Graphene oxide(GO) varying from 0 to 1.5 g to give a total of 3g were prepared.
10 trang
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Flood control measures in the lower Dong Nai - Sai Gon river basinThe lower Dong Nai - Sai Gon river basin plays a significant role in Vietnam's economic development. In the basin, Ho Chi Minh (HCM) City is known as the biggest center with a fast growing economy and increasing population. However, this area is undergoing inundation problems caused by upstream floods, heavy rains and changes in sea levels.
14 trang
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Summary of Doctoral Thesis: State of heavy metal contamination in water, food; community people’s health in the coastal area of Thuynguyen District, Haiphong and results of an experimental interventionobjectives: To identify the state of heavy metal pollution in water and food in two coastal communes of Thuy nguyen District, Haiphong city in 2017- 2018. To describe the pattern of disease and the risk due to exposure to heavy metal contamination among community residents in the study area.
27 trang
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On the influence of the americium isotopic vector on the cooling time of minor actinides bearing blankets in fast reactorsIn the heterogeneous minor actinides transmutation approach, the nuclei to be transmuted are loaded in dedicated targets often located at the core periphery, so that long-lived heavy nuclides are turned into shorter-lived fission products by fission.
8 trang
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Phẫu thuật Yokoyama cải tiến trong điều trị hội chứng Heavy Eye: Báo cáo loạt ca lâm sàngBài viết đánh giá hiệu quả của phương pháp phẫu thuật Yokoyama cải tiến trong điều trị hội chứng Heavy Eye Syndrome (HES). Phương pháp Yokoyama cải tiến là một lựa chọn hiệu quả trong điều trị HES, giúp cải thiện thị lực và chất lượng cuộc sống của bệnh nhân.
9 trang
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Summary of Chemistry doctoral thesis: The accumulation, elimination and effect of heavy metals (As, Cd, Pb) on cortisol levels in Oreochromis sp.Research scope and content: Study on Lethal Concentration 50 (LC50 - 96 hours) of As and Cd and Pb in Oreochromis sp.; the accumulation, elimination of heavy metals (As, Cd, Pb) in Oreochromis sp. in exposure phase and elimination phase; the effects of heavy metals (As, Cd, Pb) on plasma cortisol levels in Oreochromis sp.
27 trang
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Three-component U-Pu-Th fuel for plutonium irradiation in heavy water reactorsThis paper discusses concepts for three-component fuel bundles containing plutonium, uranium and thorium for use in pressurised heavy water reactors, and cases for and against implementation of such a nuclear energy system in the United Kingdom.
12 trang
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Bài giảng Xúc tác - Chương 6: Sự mất hoạt tính của xúc tác (Catalys deactivation)Bài giảng Xúc tác - Chương 6: Sự mất hoạt tính của xúc tác (Catalys deactivation). Chương này cung cấp cho học viên những nội dung gồm: các nguyên nhân và cơ chế (Causes and mechanisms); phương pháp phòng và xử lý (Prevention and treatment methods);... Mời các bạn cùng tham khảo!
22 trang
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Summary of doctoral thesis in chemistry: Synthesis, studying the properties of phenyl radical polymer film orionted to use as metal ion sensorThe objectives of the thesis: Fabrication of diaphragm sensing material based on phenyl conductive polymer has stability and high sensitivity with heavy metal cations, which is used to identify and analyze heavy metal traces in water. Mời các bạn tham khảo!
26 trang
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