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101.
Dang Tran Ngoc Vy Nguyen Thi Tuong Thuong Do Thi Hoai Phung Dung Van Dung Do Le An Pham 《Environmental science and pollution research international》2022,29(39):59094-59103
Environmental Science and Pollution Research - Vietnam is highly vulnerable to climate change-related extreme weather events such as heatwaves. This study assesses the association between heatwaves... 相似文献
102.
Kosuke Toshiki Pham Quy Giang Kevin Roy B. Serron Takahiro Sekikaw Jeoung-soo Yu Baasandash Choijil Shoichi Kunikane 《环境科学学报(英文版)》2015
Currently, most developing countries have not set up municipal solid waste management systemswith a viewof recovering energy fromwaste or reducing greenhouse gasemissions. In this article, we have studied the possible effects of introducing three energy recovery processes either as a single or combination approach, refuse derived fuel production, incineration and waste power generation, and methane gas recovery from landfill and power generation in Ulaanbaatar, Mongolia, as a case study. We concluded that incineration process is the most suitable as first introduction of energy recovery. To operate it efficiently, 3Rs strategies need to be promoted. And then, RDF production which is made of waste papers and plastics in high level of sortingmay be considered as the second step of energy recovery. However, safety control and marketability of RDF will be required at that moment. 相似文献
103.
Xiaoxi Zhang Zengwen Liu Qi Yu Nhu Trung Lu Yuanhao Bing Bochao Zhu Wenxuan Wang 《环境科学学报(英文版)》2015,27(7)
The impacts of petroleum contamination on the litter decomposition of shrub–grass land would directly influence nutrient cycling, and the stability and function of ecosystem. Ten common shrub and grass species from Yujiaping oil deposits were studied. Litters from these species were placed into litterbags and buried in petroleum-contaminated soil with 3 levels of contamination (slight, moderate and serious pollution with petroleum concentrations of 15, 30 and 45 g/kg, respectively). A decomposition experiment was then conducted in the lab to investigate the impacts of petroleum contamination on litter decomposition rates. Slight pollution did not inhibit the decomposition of any litters and significantly promoted the litter decomposition of Hippophae rhamnoides, Caragana korshinskii, Amorpha fruticosa, Ziziphus jujuba var. spinosa, Periploca sepium, Medicago sativa and Bothriochloa ischaemum. Moderate pollution significantly inhibited litter decomposition of M. sativa, Coronilla varia, Artemisia vestita and Trrifolium repens and significantly promoted the litter decomposition of C. korshinskii, Z. jujuba var. spinosa and P. sepium. Serious pollution significantly inhibited the litter decomposition of H. rhamnoides, A. fruticosa, B. ischaemum and A. vestita and significantly promoted the litter decomposition of Z. jujuba var. spinosa, P. sepium and M. sativa. In addition, the impacts of petroleum contamination did not exhibit a uniform increase or decrease as petroleum concentration increased. Inhibitory effects of petroleum on litter decomposition may hinder the substance cycling and result in the degradation of plant communities in contaminated areas. 相似文献
104.
Hoang Quoc Anh Vu Duc Nam Tran Manh Tri Nguyen Manh Ha Nguyen Thuy Ngoc Pham Thi Ngoc Mai Duong Hong Anh Nguyen Hung Minh Nguyen Anh Tuan Tu Binh Minh 《Environmental geochemistry and health》2017,39(4):935-954
Residue concentrations of polybrominated diphenyl ethers (PBDEs) in different kinds of samples including consumer products, indoor dust, sediment and fish collected from two e-waste recycling sites, and some industrial, urban and suburban areas in Vietnam were determined to provide a comprehensive assessment of the contamination levels, accumulation pattern, emission potential and human exposure through dust ingestion and fish consumption. There was a large variation of PBDE levels in plastic parts of obsolete electronic equipment (from 1730 to 97,300 ng/g), which is a common result observed in consumer plastic products reported elsewhere. PBDE levels in indoor dust samples collected from e-waste recycling sites ranged from 250 to 8740 ng/g, which were markedly higher than those in industrial areas and household offices. Emission rate of PBDEs from plastic parts of disposed electronic equipment to dust was estimated to be in a range from 3.4 × 10?7 to 1.2 × 10?5 (year?1) for total PBDEs and from 2.9 × 10?7 to 7.2 × 10?6 (year?1) for BDE-209. Some fish species collected from ponds in e-waste recycling villages contained elevated levels of PBDEs, especially BDE-209, which were markedly higher than those in fish previously reported. Overall, levels and patterns of PBDE accumulation in different kinds of samples suggest significant emission from e-waste sites and that these areas are potential sources of PBDE contamination. Intakes of PBDEs via fish consumption were generally higher than those estimated through dust ingestion. Intake of BDE-99 and BDE-209 through dust ingestion contributes a large proportion due to higher concentrations in dust and fish. Body weight normalized daily intake through dust ingestion estimated for the e-waste recycling sites (0.10–3.46 ng/day/kg body wt.) were in a high range as compared to those reported in other countries. Our results highlight the potential releases of PBDEs from informal recycling activities and the high degree of human exposure and suggest the need for continuous investigations on environmental pollution and toxic impacts of e-waste-related hazardous chemicals. 相似文献
105.
106.
Contamination by arsenic and other trace elements in tube-well water and its risk assessment to humans in Hanoi, Vietnam 总被引:7,自引:0,他引:7
Agusa T Kunito T Fujihara J Kubota R Minh TB Kim Trang PT Iwata H Subramanian A Viet PH Tanabe S 《Environmental pollution (Barking, Essex : 1987)》2006,139(1):95-106
Concentrations of As and other trace elements and their association were examined in groundwater (n = 25) and human hair (n = 59) collected at Gia Lam District and Thanh Tri District, suburban areas of Hanoi, Vietnam, in September 2001. Concentrations of As in the groundwater ranged from <0.10 to 330 microg/l, with about 40% of these exceeding WHO drinking water guideline of 10 microg/l. Also, 76% and 12% of groundwater samples had higher concentrations of Mn and Ba than WHO drinking water guidelines, respectively. Arsenic concentrations in hair of residents in Gia Lam and Thanh Tri Districts (range 0.088-2.77 microg/g dry wt.) were lower than those in other As-contaminated areas of the world, but were higher than those of people in non-contaminated areas. Concentrations of As and Mn in hair of some individuals from the Gia Lam and Thanh Tri Districts exceeded the level associated with their toxicity and, therefore, a potential health risk of As and Mn is a concern for the people consuming the contaminated water in this area. Cumulative As exposure was estimated to be lower than the threshold levels at the present, which might explain the absence of manifestations of chronic As poisoning and arsenicosis in the residents of Gia Lam and Thanh Tri Districts. To our knowledge, this study revealed for the first time that the residents are exposed not only to As but also Mn and Ba from groundwater in the Red River Delta, Vietnam. 相似文献
107.
108.
Recently, air quality has significantly improved in developed country, but that issue is of concern in emerging megacity in developing country.In this study, aerosols and their precursor gas were collected by NILU filter pack at two distinct urban sites during the winter and summer in Osaka, Japan and dry and rainy seasons in Ho Chi Minh City(HCMC),Vietnam.The aims are to investigate the contribution of water-soluble inorganic ions(WSIIs) to PM_(2.5), thermodynamic characterization and possible formation pathway of secondary inorganic aerosol(SIA).The PM_(2.5) concentration in Osaka(15.8 μg/m~3) is lower than that in HCMC(23.0 μg/m~3), but the concentration of WSIIs in Osaka(9.0 μg/m~3) is two times higher than that in HCMC(4.1 μg/m~3).Moreover, SIA including NH_4~+, NO_3~-and SO_4~(2-)are major components in WSIIs accounting for 90% and 76%(in molar) in Osaka and HCMC,respectively.Thermodynamic models were used to understand the thermodynamic characterization of urban aerosols.Overall, statistical analysis results indicate that very good agreement(R~2 0.8) was found for all species, except for nitrate aerosol in HCMC.We found that when the crustal species present at high amount, those compositions should be included in model calculation(i.e.in the HCMC situation).Finally, we analyzed the characteristics of NH_4~+– NO_3~-– SO_4~(2-)system.A possible pathway to produce fine nitrate aerosol in Osaka is via the homogeneous reaction between NH_3 and HNO_3, while nonvolatile nitrate aerosols can be formed by the heterogeneous reactions in HCMC. 相似文献
109.
Nan Zhao Huu Hao Ngo Yuyou Li Xiaochang Wang Lei Yang Pengkang Jin Guangxi Sun 《Frontiers of Environmental Science & Engineering》2019,13(4):62
110.
Panchal Hitesh Sohani Ali Van Nguyen Nguyen Shoeibi Shahin Khiadani Mehdi Huy Pham Quang Hoseinzadeh Siamak Kabeel Abd Elnaby Shaik Saboor Cuce Erdem 《Environmental science and pollution research international》2023,30(5):11769-11784
Environmental Science and Pollution Research - The combination of various methods of increasing evaporation rate can highly impact the performance of solar desalination. This investigation aims to... 相似文献