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101.
Frédérique Barbier Gérard Duc Jean-louis Imbert Michelle Petit-ramel 《Chemistry and Ecology》2013,29(6):461-470
Wastes are usually stocked in waste disposals without any pre-treatment. Runoff waters lead to the formation of leachates containing mineral and organic pollutants. In order to prevent groundwater contamination, a double barrier is placed on the landfill bottom. The first one is an active barrier made up of a draining system and a geomembrane, and the second one, consisting of a clay liner allowing pollutant retention, is considered as a passive system. The aim of this work is to evaluate the complexation impact on the organic and inorganic retention. Percolations on columns filled with clay are performed, which allow a better knowledge of the transfer of metallic pollutants, complexed or not, through a model porous media, considering charge and conditional stability of complexes. 相似文献
102.
There is a great deal of concern regarding the adverse effects of polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF) present in Agent Orange and other herbicides on Vietnam's population and ecosystems. The purpose of this study was to determine the effect of dioxin exposure on adrenal steroids in saliva, and dioxin levels in breast milk, of primiparas in an Agent Orange/dioxin hot-spot and a non-exposed area in Vietnam on the basis of epidemiological research. The subjects were 35 lactating women who had recently given birth to their first or second child. A further sub-study involved eight primiparas from each area. All subjects were aged between 20 and 30 years with infants aged between 4 and 16 weeks. The mean concentration of PCDD, PCDF, and PCDD?+?PCDF toxic equivalents (TEQ) in breast milk in the hot-spot area was significantly higher than in the non-exposed area. Cortisol and cortisone levels in the saliva of primiparas in the hot-spot area were also significantly higher than those in the non-exposed area. There was a significant negative correlation between cortisol and the cortisol/cortisone ratio and PCDD?+?PCDF and PCDF TEQ levels in the hot-spot area. Furthermore, the correlation between cortisol and cortisone and the PCDD + PCDF, PCDD, and PCDF TEQ in the combination of hot spot + non-exposed area was significant according to the curve (bell style). Our results suggest that Agent Orange/dioxin exposure still exerts a major influence on the salivary hormones of the Vietnamese population. 相似文献
103.
Dang Duc Nhu Teruhiko Kido Nguyen Ngoc Hung Le Thi Hong Thom Rie Naganuma Le Ke Son 《毒物与环境化学》2013,95(4):824-838
Human exposure to polychlorinated dibenzodioxins (PCDD) and dibenzofurans (PCDF), especially 2,3,7,8 tetrachlorodibenzo-p-dioxin (TCDD), was investigated in Vietnam since initial severe adverse health effects were reported in the late 1970s. The purpose of this study was to determine the effects of dioxin exposure on steroid hormones of primiparae in an Agent Orange/dioxin hot-spot and a non-exposed area in Vietnam. Sixteen primiparae (8 at each site), all of whom were aged between 20 and 30 years with infants aged between 4 and 16 weeks, agreed to participate in this study. The mean dioxin levels in breast milk of primiparae from the hot-spot area, in terms of PCDD, PCDF, and PCDD?+?PCDF toxic equivalents (TEQ), were significantly higher than those for the non-exposed area. PCDD TEQ, PCDF TEQ, and PCDD?+?PCDF TEQ levels showed a significant correlation with dehydroepiandrosterone (DHEA), androstenedione (A-dione), and estradiol (E2) in the saliva of primiparae in a combination of hot-spot and non-exposed areas in Vietnam. The dose–response curve between salivary E2 or A-dione levels and dioxin levels was U-shaped in humans. This study provides an overview of studies regarding dioxin hot-spots and effects on human health and steroid hormone levels in particular, with a focus on the toxicity attributed to dioxins and furans. Furthermore, causal evidence regarding the effects of dioxins on endocrine disruption in humans is provided. 相似文献
104.
Claudia Ringler Nguyen Vu Huy Siwa Msangi 《Journal of the American Water Resources Association》2006,42(6):1465-1482
Abstract: Recent water sector reforms and increased scarcity and vulnerability of water resources, combined with declining public funding available for large scale infrastructure investment in the sector, have led to a greater awareness by the Government of Vietnam for the need to analyze water resource allocation and use in an integrated fashion, at the basin scale, and from a perspective of economic efficiency. In this study we focus on the development, application, and selected policy analyses using an integrated economic hydrologic river basin model for the Dong Nai River Basin in southern Vietnam. The model framework depicts the sectoral structure and location of water users (agriculture, industry, hydropower, domestic, and the environment) and the institutions for water allocation in the basin. Water benefit functions are developed for the major water uses subject to physical limitations and to constraints of system control and policy. Based on this modeling framework, we will analyze policies that can affect water allocation and use at the basin level, including both basin-specific and general macroeconomic policies. 相似文献
105.
Huynh Trong-Phuoc Vu Viet-Hung Van-Pham Dan-Thuy 《Journal of Material Cycles and Waste Management》2022,24(2):642-654
Journal of Material Cycles and Waste Management - The cementitious and microstructural characteristics of an innovative waste-based eco-cement consisting of ground granulated blast-furnace slag... 相似文献
106.
Journal of Material Cycles and Waste Management - Recycling is one of the priority solutions for reducing the amount of waste entering landfills. To achieve high rates of recycling, citizens are... 相似文献
107.
Bui Thi Hieu Nguyen Duc Luong Nguyen Hoang Hiep 《Environmental science and pollution research international》2022,29(28):41923-41940
Environmental Science and Pollution Research - The spatiotemporal distribution and characterization of aerosol optical properties in the north of Vietnam were investigated extensively using the... 相似文献
108.
Pham Hong Thi Vu Long Duc Lê Ngoc Chi Hoang Thu-Huong Thi 《Environmental science and pollution research international》2022,29(28):42005-42015
Environmental Science and Pollution Research - It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota... 相似文献
109.
Truong Dai Quyet Loganathan Paripurnanda Tran Le Minh Vu Duc Loi Nguyen Tien Vinh Vigneswaran Saravanamuthu Naidu Gayathri 《Environmental science and pollution research international》2022,29(12):16959-16972
Environmental Science and Pollution Research - Ammonium removal from drinking water to protect human and environmental health is one of the major global concerns. This study evaluates the... 相似文献
110.
Naseer Saira Song Huaming Chupradit Supat Maqbool Adnan Hashim Nik Alif Amri Nik Vu Hieu Minh 《Environmental science and pollution research international》2022,29(14):20296-20304
Environmental Science and Pollution Research - It is observed that an educated labor force can increase the absorption capacity of the economy and improve the effectiveness of green technologies... 相似文献