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1.
石河子市地下水环境背景值 总被引:10,自引:0,他引:10
采集并测定了石河子市19个地下水背景水样,分别确定了该市潜水和承压—自流水中K+、Na+、Ca2+、Mg2+、Cl-、SO、HCO、NO、F-、总硬度、矿化度、可溶性SiO2、COD、pH、Cu、Pb、Zn、Cd、Mn、V、Li、Mo、Se、Hg、I、As、Cr+5、C6H5OH、CN-、ABS的环境背景值. 相似文献
2.
黄浦江上游优先控制有机物的筛选 总被引:7,自引:1,他引:6
参考国内外同行有关控制物的筛选方法,通过黄浦江上游饮用水源保护区内水质的污染现状分析,确立了黄浦江上游水源保护区优先控制污染物的筛选原则和筛选程序,建立了黄浦江上游工业废水和地面水中的优先控制的名单。 相似文献
3.
Water environmental degradation is a major issue in the Heihe River Basin belonging to the inland river basin of temperate arid zone in northwestern China. Mankind’s activities, such as dense population and heavy dependence on irrigated agriculture, place immense pressure on available and limited water resources during the last century, especially the recent five decades. An investigation on the water environmental degradation in the Heihe River Basin and analysis of its causation were conducted. The results indicated that water environmental changes in the whole basin were tremendous mostly in the middle reaches, which reflected in surface water runoff change, decline of groundwater table and degeneration of surface water and groundwater quality. Some new forms of management based on traditional and scientific knowledge must be introduced to solve problems of water environmental degradation in the Heihe River Basin. 相似文献
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5.
Hydrogeochemistry and Groundwater Quality Assessment of Lower Part of the Ponnaiyar River Basin, Cuddalore District, South India 总被引:5,自引:0,他引:5
Jeevanandam M Kannan R Srinivasalu S Rammohan V 《Environmental monitoring and assessment》2007,132(1-3):263-274
The Lower Ponnaiyar River Basin forms an important groundwater province in South India constituted by Tertiary formations
dominated by sandstones and overlain by alluvium. The region enjoyed artesian conditions 50 years back but at present frequent
failure of monsoon and over exploitation is threatening the aquifer. Further, extensive agricultural and industrial activities
and urbanization has resulted in the increase in demand and contamination of the aquifer. To identify the sources and quality
of groundwater, water samples from 47 bore wells were collected in an area of 154 km2 and were analysed for major ions and trace metals. The results reveal that the groundwater in many places is contaminated
by higher concentrations of NO3, Cl, PO4 and Fe. Four major hydrochemical facies Ca–Mg–Cl, Na–Cl, Ca–HCO3 and Na–HCO3 were identified using Piper trilinear diagram. Salinity, sodium adsorption ratio, and sodium percentage indicate that most
of the groundwater samples are not suitable for irrigation as well as for domestic purposes and far from drinking water standards.
The most serious pollution threat to groundwater is from nitrate ions, which are associated with sewage and fertilizers application.
The present state of the quality of the lower part of Ponnaiyar River Basin is of great concern and the higher concentration
of toxic metals (Fe and Ni) may entail various health hazards. 相似文献
6.
Soil salinization is an important worldwide environmental problem, especially in arid and semi-arid regions. Knowledge of
its temporal and spatial variability is crucial for the management of oasis agriculture. The study area has experienced dramatic
change in the shallow groundwater table and soil salinization during the 20th century, especially in the past two decades.
Classical statistics, geostatistics and geographic information system (GIS) were applied to estimate the spatial variability
of the soil salt content in relation to the shallow groundwater table and land use from 1983 to 2005. Consumption of reservoir
water for agricultural irrigation was the main cause of a rise in the shallow groundwater table under intense evapotranspiration
conditions, and this led indirectly to soil salinization. The area of soil salt accumulation was greater in irrigated than
in non-irrigated landscape types with an increasing of 40.04% from 1983 to 2005 in cropland at ∼0.43 t ha−1 year−1, and an increase at ∼0.68 t ha−1 year−1 in saline alkaline land. Maps of the shallow groundwater table in 1985 and 2000 were used to deduce maps for 1983 and 1999,
respectively, and the registration accuracy was 99%. 相似文献
7.
Leachate Characterization and Assessment of Groundwater Pollution Near Municipal Solid Waste Landfill Site 总被引:4,自引:0,他引:4
Leachate and groundwater samples were collected from Gazipur landfill-site and its adjacent area to study the possible impact
of leachate percolation on groundwater quality. Concentration of various physico-chemical parameters including heavy metal
(Cd, Cr, Cu, Fe, Ni, Pb and Zn) and microbiological parameters (total coliform (TC) and faecal coliform (FC)) were determined
in groundwater and leachate samples. The moderately high concentrations of Cl−, NO−
3, SO2−
4, NH+
4, Phenol, Fe, Zn and COD in groundwater, likely indicate that groundwater quality is being significantly affected by leachate
percolation. Further they proved to be as tracers for groundwater contamination. The effect of depth and distance of the well
from the pollution source was also investigated. The presence of TC and FC in groundwater warns for the groundwater quality
and thus renders the associated aquifer unreliable for domestic water supply and other uses. Although some remedial measures
are suggested to reduce further groundwater contamination via leachate percolation, the present study demand for the proper
management of waste in Delhi. 相似文献
8.
Heavy metal contamination from mining sites in South Morocco: Monitoring metal content and toxicity of soil runoff and groundwater 总被引:4,自引:0,他引:4
El Khalil H El Hamiani O Bitton G Ouazzani N Boularbah A 《Environmental monitoring and assessment》2008,136(1-3):147-160
The aim of the present work is the assessment of metal toxicity in runoff, in their contaminated soils and in the groundwater
sampled from two mining areas in the region of Marrakech using a microbial bioassay MetPLATE™. This bioassay is based on the
specific inhibition of the β-galactosidase enzyme of a mutant strain of Escherichia coli, by the metallic pollutants. The stream waters from all sampling stations in the two mines were all very toxic and displayed
percent enzyme inhibition exceeding 87% except SWA4 and SWB1 stations in mine C. Their high concentrations of copper (Cu) and zinc (Zn) confirm the acute toxicity shown by MetPLATE.
The pH of stream waters from mine B and C varied between 2.1 and 6.2 and was probably responsible for metal mobilization,
suggesting a problem of acid mine drainage in these mining areas. The bioassay MetPLATE™ was also applied to mine tailings
and to soils contaminated by the acidic waters. The results show that the high toxicity of these soils and tailings was mainly
due to the relatively concentration of soluble Zn and Cu. The use of MetPLATE™ in groundwater toxicity testing shows that,
most of the samples exhibited low metal toxicity (2.7–45.5% inhibition) except GW3 of the mine B (95.3% inhibition during
the wet season and 82.9% inhibition during the dry season). This high toxicity is attributed to the higher than usual concentrations
of Cu (189 μg Cu l−1) and Zn (1505 μg Zn l−1). These results show the potential risk of the contamination of different ecosystems situated to the vicinity of these two
metalliferous sites. The general trend observed was an increase in metal toxicity measured by the MetPLATE with increasing
total and mobile metal concentrations in the studied matrices. Therefore, the MetPLATE bioassay is a reliable and fast bioassay
to estimate the metals toxicity in the aquatic and solids samples. 相似文献
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10.
Analysis and evaluation of nitrate levels in groundwater at Al-Hashimiya area, Jordan 总被引:3,自引:0,他引:3
Obeidat MM Massadeh AM Al-Ajlouni AM Athamneh FS 《Environmental monitoring and assessment》2007,135(1-3):475-486
Water with high nitrate concentration (NO3
−) is unfit for human consumption, especially when its concentration exceeded the threshold limit (50 mg/l) recommended by
the health authorities such as the World Health Organization (WHO). In Jordan, there is a great concern for determination
and monitoring organic and inorganic pollutants that may reach groundwater. Nitrate is highly mobile and present in domestic,
agricultural and industrial waste in Jordan, and thus this study focused initially on nitrate as both a contaminant of concern
and as an indicator of potential groundwater contamination. The present study determined the extent of nitrate contamination
in groundwater in the study area and examined the likely sources of NO3
−. A total of 248 groundwater samples were collected from 16 wells in different sites of Al-Hashimiya area, Zerqa Governorate,
Jordan, and investigated for NO3
− concentrations. Moreover, measurements of temperature, electrical conductivity and pH were carried out in the field. Analysis
was carried out according to the methods described by the American Public Health Association (APHA). Results showed that there
was a dramatic increasing in NO3
− concentrations from the year 2001 to 2006 for some selected wells in the present study. NO3
− concentration in 2006 was ranged from 10 to 330 mg/l with an average of 77 mg/l. Overall, groundwater had elevated nitrate
concentration with 92% of the samples containing more than 20 mg/l NO3
−, indicating the influence of human activities. This study has shown that there is a strong correlation between the nitrate
concentration and the wastewater effluents as a source of pollution. 相似文献