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181.
Huy Lai Nguyen Oanh Nguyen Thi Kim Phuc Nguyen Hong Nhung Chu Phuong 《Environmental science and pollution research international》2021,28(9):10678-10695
Environmental Science and Pollution Research - Local questionnaire surveys were conducted to collect representative activity data for calculation of annual emissions from residential combustion in... 相似文献
182.
Philip H Byer Chi Phuong Hoang Thi Thuc Thuy Nguyen Sangeeta Chopra Virginia Maclaren Murray Haight 《Waste management & research》2006,24(5):465-472
In Da Nang and Ha Long, Vietnam and in Vientiane, Laos, there was interest by local authorities in separating and composting waste in order to reduce environmental and health problems at the local landfills and to produce a soil conditioner for local agricultural use. To assist in the planning of composting projects, three studies were carried out to estimate waste quantities and composition. 1. A 9-day audit of waste from 45 vendors in a market in Vientiane, the capital of Laos. The total quantity of waste and the quantity in each of nine categories were estimated for each of six different types of vendors. 2. A 7-day audit of waste disposed by three hotels in the tourist area of Ha Long, Vietnam. Waste quantities were estimated in total, on a per guest basis, and in three main categories: compostables, recyclables and miscellaneous. 3. A 7-day audit of waste collected from 74 households in Da Nang, the fourth largest city in Vietnam. Waste from each household was separated into compostable and non-compostable waste. Over 60% of each waste source comprised compostable waste and this was considered significant enough to warrant further planning of composting operations. 相似文献
183.
Toan Nguyen Solveig Heide Lucie Guilbaud Stéphanie Valence Saskia Vande Perre Eléonore Blondiaux Boris Keren Geneviève Quenum-Miraillet Jean-Marie Jouannic Laurent Mandelbrot Olivier Picone Agnès Guet Vassilis Tsatsaris Mathieu Milh Nadine Girard Marie Vincent Mathilde Nizon Céline Poirsier Alexandre Vivanti Alexandra Benachi Vincent des Portes Laurent Guibaud Olivier Patat Myrtille Spentchian Lisa Frugère Delphine Héron Catherine Garel 《黑龙江环境通报》2023,43(6):746-755
184.
Sp Thenappa S. Nguyen Phuc T. T. Do Nga H. N. Le Duyen K. Thai Quoc B. Le Phung K. Phan-Thien Nhan Duong Hai M. 《Journal of Material Cycles and Waste Management》2021,23(3):885-894
Journal of Material Cycles and Waste Management - Over 60 million tons of aluminium are produced annually, requiring sustainable and eco-friendly recycling methods of aluminium waste. In this work,... 相似文献
185.
Yeo Sang Gu Nhai Nguyen Thi Huong Dong Jong-In 《Journal of Material Cycles and Waste Management》2018,20(3):1615-1624
Journal of Material Cycles and Waste Management - Although waste-to-energy (WtE) may reduce the amount of waste disposed and recover the heat in the form of electricity or steam, it has limitations... 相似文献
186.
Cafer T. Yavuz J. T. Mayo Carmen Suchecki Jennifer Wang Adam Z. Ellsworth Helen D’Couto Elizabeth Quevedo Arjun Prakash Laura Gonzalez Christina Nguyen Christopher Kelty Vicki L. Colvin 《Environmental geochemistry and health》2010,32(4):327-334
Arsenic contamination in groundwater is a severe global problem, most notably in Southeast Asia where millions suffer from acute and chronic arsenic poisoning. Removing arsenic from groundwater in impoverished rural or urban areas without electricity and with no manufacturing infrastructure remains a significant challenge. Magnetite nanocrystals have proven to be useful in arsenic remediation and could feasibly be synthesized by a thermal decomposition method that employs refluxing of FeOOH and oleic acid in 1-octadecene in a laboratory setup. To reduce the initial cost of production, $US 2600/kg, and make this nanomaterial widely available, we suggest that inexpensive and accessible “everyday” chemicals be used. Here we show that it is possible to create functional and high-quality nanocrystals using methods appropriate for manufacturing in diverse and minimal infrastructure, even those without electricity. We suggest that the transfer of this knowledge is best achieved using an open source concept. 相似文献
187.
188.
Riparian wetlands containing springs are thought to be ineffective at removing nitrate because contact times between the upwelled ground water and the underlying microbially active soils are short. Tracer experiments using lithium bromide (LiBr) and nitrate (NO3-N) injected at the surface were used to quantify residence times and NO3-N removal in a riparian swale characteristic of New Zealand hill-country pasture. An experimental enclosure was used with collecting trays at the downstream end to measure flow and concentration, shallow wells to measure subsurface concentrations, and an array of logging conductivity probes to monitor tracer continuously. The majority of added tracer reached the outlet more slowly than could be explained by surface flow, but more quickly than could be explained by Darcy seepage flow. There was evidence from the wells of tracer diffusing vertically to a depth of at least 5 cm into the surface soil layer, which was permanently saturated and highly porous. During dry weather 24 +/- 9% of added NO3-N was removed over a distance of 1.5 m largely by denitrification. The net uptake length coefficient for this wetland (K = 0.08 +/- 0.03 m(-1)) is slightly higher than the range (K = 0.01-0.07 m(-1)) measured in a small stream channel infested with macrophytes. Nitrate removal is expected to decrease with increasing flow. Seepage flow is estimated to have removed only 7 +/- 4% of the added NO3-N and we hypothesize that vertical diffusion substantially increases NO3-N removal in this type of wetland. Riparian wetlands with springs and surface flows should not be dismissed as having low NO3-N removal potential without checking whether there is significant vertical mixing. 相似文献
189.
Nguyen Anh Tuan 《Natural resources forum》1997,21(3):201-207
This paper discusses the pattern of commercial and traditional energy use in Vietnam and its evolution. It presents the trend of energy-related emissions of CO2 , SO2 and NOx during the past decade with a methodology given in an Appendix. Recent developments of environmental policies and institutions in Vietnam are also discussed. 相似文献
190.