spatial variation copper

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Sustainability | Free Full-Text | Spatial and Temporal Variations of

When considering the factors affecting the spatial and temporal variation of nitrogen and phosphorus in karst watersheds, the unique karst hydrogeology as an internal influencing factor cannot be ignored, as well as natural factors such as meteorological hydrology and external factors such as human activities. A watershed-scale field …

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Micro-spatial variation of soil metal pollution and plant recruitment

Spatial variation in a grassland on soil rich in heavy metals. Journal of Vegetation Science (1997) J.J. Chiang et al. Determinación de cadmio, cobre, manganeso, plomo, hierro, cinc y arsénico en sedimento atmosférico en la zona de Quintero, V región, Valparaı́so, Chile ... The capacity of the strains to tolerate copper and zinc was ...

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Temporal variation in the diversity and cover of sessile species in

The results show that the drastic reduction on the sessile species diversity and the monopolization of the substrate exerted by the green algae Enteromorpha compressa, are common and permanent features of the intertidal rocky shores affected by copper mine tailings. Such spatial (between sites) and temporal (seasonal) variation of these …

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IJERPH | Free Full-Text | Seasonal and Spatial Variation in …

To study the seasonal variations in and spatial distributions of dissolved heavy metals in Liaodong Bay, field observations of copper, lead, cadmium, and zinc at 93 stations (87 within the bay and six at its inflowing rivers) were …

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Micro-spatial variation of soil metal pollution and plant recruitment

Copper solubility does not differ between microhabitats although it tends to be slightly higher below shrubs where total Cu content is also higher than in open spaces ... Spatial variation in a grassland on soil rich in heavy metals. Journal of Vegetation Science, 8 (1997), pp. 601-604.

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Temporal-spatial variations in Li-Fe mica compositions from the

Temporal-spatial variations in Li-Fe mica compositions from the Weilasituo Sn-polymetallic deposit (NE China): Implications for deposit-scale fluid evolution ... molybdenum stage and copper-zinc stage was analysed in situ for major and trace element composition. Weilasituo mica is enriched in Li, Rb, Cs and Zn, has a moderate W and Sn …

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"Seasonal and spatial patterns of metals at a restored copper …

Spatial variation was assessed in 400 m of reach encompassing an acidic, metal-laden seep. At this seep, pH remained low (2-3) throughout the year, and copper …

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(PDF) Spatial variation in concentrations of heavy

Spatial variation in the distribution of copper, lead and zinc in sediments in Botany Bay, Australia, is described. Sampling was done according to a nested, hierarchical design, and variation was ...

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10.1016/S0141-1136(98)00113-5 | DeepDyve

The specific objectives of this present work were to: (1) observe any spatial variation of the copper and zinc content of U. lactuca and E. intestinalis and to assess if this reflects the trends obtained from measurements of surface waters, (2) estimate temporal (within and between years) changes in copper and zinc content of the two seaweeds ...

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Temporal and spatial variations in characteristics of

Numerous studies of fluid inclusions in porphyry copper deposits have been published during the past 100+ years, starting with early studies by Lindgren (1905) and continuing today. These many studies have documented systematic variations in fluid inclusion characteristics within individual deposits, and that variations observed from …

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IJERPH | Free Full-Text | Seasonal and Spatial Variation in Dissolved

To study the seasonal variations in and spatial distributions of dissolved heavy metals in Liaodong Bay, field observations of copper, lead, cadmium, and zinc at 93 stations (87 within the bay and six at its inflowing rivers) were …

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Spatial variation of copper, chromium, iron, manganese, …

Spatial variation of copper, chromium, iron, manganese, magnesium, sulfate, and TDS. Source publication Wastewater Characterization of Chiniot Drain and Evaluation of …

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Seasonal and spatial patterns of metals at a restored copper …

Seasonal and spatial variations in metal concentrations and pH were found in a stream at a restored copper mine site located near a massive sulfide deposit in the Foothill copper-zinc belt of the Sierra Nevada, California. At the mouth of the stream, copper concentrations increased and pH decreased with increased streamflow after the …

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Spatial variation of copper concentration.

Context 1 ... order of the average content of heavy metals concentrations in the waters of the exploitation site is: Cu < Zn < Ni < Cd < Pb < Fe. Fig. 3 presents the spatial variation of...

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Spatial and Temporal Variations in Copper Speciation in San …

This work indicates that free copper activity lies between 10-11 and 10-13, and declines from the entrance to the head of San Diego Bay, even though the total copper concentration …

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(PDF) The seasonal and spatial variations of labile copper, iron

Lakes & Reservoirs: Research and Management 2007 12: 303–313 Blackwell Publishing Ltd Original Articles The seasonal and spatial variations of labile copper, iron, Sediment fractions in Lake Naivasha, Kenya manganese, lead and zinc sediment fractions in Lake Naivasha, Kenya Joseph Nyingi Kamau,1* Anthony Gachanja,2 Catherine Ngila,3 …

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Spatial variations of concentrations of copper and its

RESEARCH ARTICLE Spatial variations of concentrations of copper and its speciation in the soil-rice system in Wenling of southeastern China Keli Zhao & Weijun Fu & Xingmei Liu & Dongliang Huang & Chaosheng Zhang & Zhengqian Ye & Jianming Xu Received: 22 July 2013/Accepted: 10 February 2014/Published online: 25 February 2014

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Tutorials — Don't Start Me Talking

Introduction to Rikken, M. G. J., & Van Rijn, R. P. G. (1993): Soil pollution with heavy metals—An inquiry into spatial variation, cost of mapping and the risk evaluation of copper, cadmium, lead and zinc in the floodplains of the Meuse west of Stein, the Netherlands. Dept. of Physical Geography, Utrecht University.

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Cadmium, copper and zinc leaching and surface run-off

Request PDF | Cadmium, copper and zinc leaching and surface run-off losses at the Öjebyn farm in Northern Sweden—Temporal and spatial variation | Quantitative estimates of cadmium (Cd), copper ...

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Spatiotemporal variation evaluation of water quality in middle and

The temporal and spatial variations in water quality, the application of WQI method and the development of the WQI min model consisting of the key water quality parameters need further investigation.

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Distribution characteristics of available trace elements in soil from …

Through field and laboratory tests we studied the temporal and spatial variation in the soil content of four available trace elements :copper(Cu), iron(Fe), manganese(Mn) and zinc (Zn), to analyze their distribution characteristics in reclaimed mining land under different reclamation conditions. ... Within the 30–40 cm soil layer, the …

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Spatial variation of copper and lead concentrations of water …

Copper and lead had similar spatial distribution. Metal concentrations in the sediments, roots and leaves declined exponentially with increased distance from the inflow to the wetland. Distance from an inflow explained much of the variation in metal concentrations, up to: 87% for Pb and 85% for Cu in roots; 54% for Cu in leaves; 88% for …

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Seasonal and Spatial Variation in Dissolved Heavy Metals in …

The measurements of copper (Cu), lead (Pb) and cadmium (Cd) were carried out using absorption spectrometry (AAS), and concentration of zinc (Zn) was analyzed using graphite furnace atomic absorption spectrometry (GFAAS). ... To study the seasonal variations in and spatial distributions of dissolved heavy metals in Liaodong Bay, field ...

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The bioavailability and potential ecological risk of copper and zinc …

Copper (Cu) and zinc (Zn) are consistently found at environmentally significant levels in sediments worldwide. We hypothesized that the bioavailability and potential ecological risk of Cu and Zn in river sediments may be affected by seasonal variations and spatial distribution. ... Similar seasonal variations and spatial distribution for the ...

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Spatial heterogeneity of heavy metal contamination in soils and …

By investigating the spatial variations of Pb and Cd contents in soils and M ... Z. H. & Wong, M. H. Accumulation of lead, zinc, copper and cadmium by 12 wetland plant species thriving in metal ...

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Spatial distribution and source analysis of heavy metals in soils

In Falun, Sweden, the main source of lead (Pb) pollution was a large amount of waste generated by copper smelters, sulfuric acid plants, paint factories, and chemical plants ... The variation coefficient reflects the spatial variation degree of heavy metal content at various points. If this is greater than 0.5, the spatial distribution is not ...

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Spatial variations in the estimated production of reactive o

ter 2017 in Toronto, Canada, to characterize spatial variations in iron (Fe) and copper (Cu) concentrations in PM2.5. Information on Fe and Cu concentrations at each site was paired with a kinetic multilayer model of surface and bulk chemistry in the lung epithelial lining fluid to estimate the possible impact of these metals on the production of reactive oxygen …

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(PDF) Micro-spatial variation of soil metal pollution and plant

between shrubs with sparse herbaceous cover, (2) areas The main objectives of this study were (1) to character- below the compact canopy of S. obtusiloba, and (3) areas ise soil metal distribution at small spatial scales in a below the semi-compact canopy of B. linearis (Fig. 1). highly polluted area near a copper smelter; (2) to char- acterise ...

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Analysis of spatial variability in factors contributing to vegetation

Driving forces exhibit spatial variation in contributing to vegetation restoration. Abstract. As a typical ecologically fragile region, the Loess Plateau of China has much improved in the ecological environment in the past two decades. In order to achieve a more efficient implementation of ecological projects in the future, it is of great ...

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Within-City Variation in Reactive Oxygen Species from Fine …

Spatial variations in annual mean ROS were based on a land-use regression model derived from 2-week average concentrations of iron and copper in PM 2.5 at 81 unique sites in Toronto in the summer of 2016 and the winter of 2017 . Further details on ROS and other exposures are described in Text E1 in the online supplement.

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