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Le Nguyen Truc Thinh Nguyen An Ha Nguyen Thi Vinh Tien Nguyen Dinh Lam Nguyen Duc Hong Nguyen Van Tuan Nguyen Tat Hanh Ta Van Khanh Nguyen Ngoc Thanh Nguyen Ngoc Hens Luc 《Environment, Development and Sustainability》2022,24(10):12427-12445
Environment, Development and Sustainability - The recent growth of agriculture, industry and urban areas in Vietnam requires a large amount of water consumption as a production factor. This paper... 相似文献
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Hoang Anh Tuan Nguyen Xuan Phuong Duong Xuan Quang Huynh Thanh Tung 《Environmental science and pollution research international》2021,28(23):28876-28910
Environmental Science and Pollution Research - Always, oil spills do cause serious and dire consequences for the environment, nature, and society that it consumes much time and socio-economic... 相似文献
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Shasha Jiang Tuan A. H. Nguyen Victor Rudolph Hong Yang Dongke Zhang Yong Sik Ok Longbin Huang 《Environmental geochemistry and health》2017,39(2):403-415
A wide range of waste biomass/waste wood feedstocks abundantly available at mine sites provide the opportunity to produce biochars for cost-effective improvement of mine tailings and contaminated land at metal mines. In the present study, soft- and hardwood biochars derived from pine and jarrah woods at high temperature (700 °C) were characterized for their physiochemical properties including chemical components, electrical conductivity, pH, zeta potential, cation-exchange capacity (CEC), alkalinity, BET surface area and surface morphology. Evaluating and comparing these characteristics with available data from the literature have affirmed the strong dictation of precursor type on the physiochemical properties of the biochars. The pine and jarrah wood feedstocks are mainly different in their proportions of cellulose, hemicellulose and lignin, resulting in biochars with heterogeneous physiochemical properties. The hardwood jarrah biochar exhibits much higher microporosity, alkalinity and electrostatic capacity than the softwood pine. Correlation analysis and principal component analysis also show a good correlation between CEC–BET–alkalinity, and alkalinity–ash content. These comprehensive characterization and analysis results on biochars’ properties from feedstocks of hardwood (from forest land clearance at mine construction) and waste pine wood (from mining operations) will provide a good guide for tailoring biochar functionalities for remediating metal mine tailings. The relatively inert high-temperature biochars can be stored for a long term at mine closure after decades of operations. 相似文献
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Seasonal trend of ambient PCDD/Fs in Tianjin City, northern China using active sampling strategy 总被引:2,自引:0,他引:2
Lei Ding Yingming Li Pu Wang Xiaomin Li Zongshan Zhao Qinghua Zhang Ting Tuan Guibin Jiang 《环境科学学报(英文版)》2012,24(11):1966-1971
The spatial concentrations, seasonal trends, profiles and congener pairs of ambient polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were investigated within a seasonally active sampling scheme during Jun 2008 and Jan 2009 in Tianjin City, northern China. The PCDD/F concentrations ranged 14.2-172 fg I-TEQ/m3 (average 69.3 fg I-TEQ/m3) in summer and (89.8-1.01) × 103 fg I-TEQ/m3 (average 509 fg I-TEQ/m3) in winter, respectively, except for the E-waste dismantling site where much higher values were observed (1.04 × 103 fg I-TEQ/m3 in summer and 7.123 × 103 fg I-TEQ/m3 in winter). The results indicated a significantly seasonal trend with higher TEQ values in winter as compared with summer, which could be related to increased emission sources and seasonal variations of the atmospheric boundary layer height. 2,3,4,7,8-PeCDF was the dominant contributor to the total PCDD/F toxic equivalents, and 2,3,7,8-TCDD was detected at almost all the sampling sites in winter. Most of the similarly substituted PCDD/F congener pairs exhibited high correlations, suggesting that they might have similar environmental fate or sources. But different seasonal and spatial distributions of PCDD/F concentrations indicated that the emission sources might be intermittent. 相似文献
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2012年,每两个月采集一次上海人工滩涂湖泊——滴水湖水系表层沉积物,检测16种多环芳烃(PAHs)含量.结果表明,滴水湖水系∑PAHs变化范围为74.03~579.20ng/g,平均值为272.55ng/g.其中,闸外引水河[(407.64±6.90)ng/g]≈闸内引水河[(427.99±213.84)ng/g]>滴水湖[(156.33±62.00)ng/g].研究区各点蒽/(蒽+菲)比值均大于0.1,说明PAHs主要来自于石油燃烧源.生态风险评价表明,滴水湖水系沉积物PAHs不存在严重的生态风险,但闸外和闸内引水河沉积物PAHs存在较低几率的潜在风险,湖区沉积物PAHs则无潜在风险. 相似文献
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Foo Tuan Seik 《Local Environment》2013,18(3):285-297
A city farm concept called the Nature Corner project, which involves both animals and plants, was initiated in Ghim Moh housing estate, Singapore, in 1997. The objectives of the community project were to introduce nature to residents and to encourage social interaction. The paper analyses the project's set-up, assesses the funding, maintenance and other issues involved and discusses the findings of a 1998 sample survey of users and non-users of the project. It was found from the survey that the project has been quite successful in introducing nature to users but less successful in encouraging social interaction among them. 相似文献
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Claudia Kuenzer Ian Campbell Marthe Roch Patrick Leinenkugel Vo Quoc Tuan Stefan Dech 《Sustainability Science》2013,8(4):565-584
Hydropower developments along the main stem of the Mekong River and its tributaries cause transboundary effects within the Mekong Basin Region, which comprises parts of six countries. On the one hand, the provision of hydropower triggers economic development and helps to meet the rising energy demand of the Mekong riparian countries, especially China, Thailand, and Vietnam. On the other hand, the negative impact of dam construction, mainly altered water flow and sediment load, has severe impacts on the environment and the livelihoods of the rural Mekong population. Several discrepancies exist in the needs, demands, and challenges of upstream versus downstream countries. Against the common apprehension that downstream countries are powerlessly exposed to mainly negative impacts whereas upstream countries unilaterally benefit from hydropower, the authors argue that upstream–downstream relations are not really clear-cut. This conclusion is based on a consideration of the complex power play between Mekong riparians, with a focus on recent power trade interactions. The article investigates the consequences of hydropower dams for the Mekong region as well as the role of supranational players, such as the Mekong River Commission and the Greater Mekong Subregion Initiative, on the hydropower debate. It is not nations that are the winners or losers in the hydropower schemes in the Mekong, but rather parts of the riparian population: a few influential and powerful elites versus the large mass of rural poor. 相似文献
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Ultrasonication (US), which creates hydro-mechanical shear forces in cavitation, is an advanced technology in sludge pretreatment. However, there are many factors affecting the efficacy of cavitation and ultrasonication disintegration of sludge as a consequence. The objective of this work is to present an extensive review of evaluation approaches of sludge US pretreatment efficiency. Besides, optimization methodologies of related parameters, the differences of optimum values and the similarities of affecting trends on cavitation and sludge pretreatment efficiency were specifically pointed out, including ambient conditions, ultrasonic properties, and sludge characteristics. The research is a prerequisite for optimization of sludge US pretreatment efficiency in lab-scale and practical application. There is not-yet a comprehensive method to evaluate the efficiency of sludge US pretreatment, but some main parameters commonly used for this purpose are degree of sludge disintegration, proteins, particle size reduction, etc. Regarding US parameters, power input PUS, intensity IUS, and frequency FS seem to have significant effects. However, the magnitude of the effect of PUS and probe size in terms of IUS has not been clearly detailed. Investigating very low FS seems interesting but has not yet been taken into consideration. In addition, static pressure effect has been marginally studied only and investigation on the effect of pH prior to US process has been restricted. Their effects therefore should be varied separately and simultaneously with other related parameters, i.e. process conditions, ultrasonic properties, and sludge characteristics, to optimize sludge US pretreatment process. 相似文献
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呼伦贝尔市环境监测站对呼伦湖多年水质监测的数据,通过进行统计分析后显示:近10年,呼伦湖水质为劣V类,重度污染,水体富营养化较严重,富营养化程度呈逐年加重趋势.主要污染物总磷、氨氮、氟化物、高锰酸盐指数、化学需氧量以及水体营养状态指数与周围地区同期降水量相关性分析结果显示:该湖主要污染物、水体营养状态指数与周围地区同期降水量无相关,湖水水质优劣与富营养化程度不完全由其周围地区降水量决定.根据呼伦湖具体情况分析其重度污染、中度富营养化的原因,并针对污染来源提出防治对策建议. 相似文献