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Metals associated with urban soils are of environmental concern because of their direct and indirect effects on human health. The main purposes of this study undertaken in the city of Poznań (Poland) were to identify heavy metals with dangerous environmental load and to define areas of their environmental impact. Measured concentrations of cadmium, lead, copper and zinc in surface horizon and background soils were used to estimate the geochemical load indices and their spatial distribution in urban soils. It was found that concentrations of heavy metals were higher than geochemical background in 61% of the samples for Cadmium, 47% of samples for Lead, 49% of samples for Copper, and 61% of samples for Zinc. Contaminated areas by heavy metals are concentrated around industrial plants and in the center of the city as well as along highways.
Metal associated with urban soils are of environmental concern due to their direct and indirect effects on human health. Metallic elements in contaminated soils are absorbed by plants and undergo biomagnification in the food chain. Allotment gardens are often situated in city centers and in areas with strong anthropogenic pressure – e.g. near industrial plants and roads. The aim of this study was to identify the bioavailable forms of metals present in urban soils. The sequential extraction procedure was applied to fractionate the following metals in urban soil samples from allotment gardens in Koszalin, Poland: chromium, copper, iron, manganese, nickel, lead, cadmium, and zinc. The mobility of the metals from studied soils decreased in the order: Cd > Mn > Pb > Zn > Ni > Cr > Cu > Fe. The sum of particular metals in the bioavailability fractions BCR I-III was: Cd 77-89%, Mn 72-81%, Pb 64-80%, Zn 54-77%, Ni 31-57%, Cr 32-53%, Cu 20-50%, and Fe 12-17%.
Presented here are the results of the investigations of the impact of building materials and peat on the static hydro-physical characteristics of Orthic Luvisol. The basic physical and chemical properties of the mixtures investigated have been determined. It has been assumed that a mixture of soil with foam-concrete shows a much higher level of water retention than do other mixtures in the whole range of pF values. The highest differences have been noticed for amounts of gravitational water and water useful for plants. The addition of peat into the soil and model mixtures increased retention levels in the whole range of pF values of the mixtures investigated. The presence of peat contributed mainly to an increase in water useful for plants and in water unavailable for plants.
The article presents an overview of the results of a study concerning the zinc and lead content in urban soils of Kielce with regard to different land use. 61 topsoil samples were collected in the industrial areas (I), urban green areas (Z), urban allotment gardens (O), as well as parks and forests (P). The maximum values for zinc and lead were observed in the industrial zone, i.e. 181.3 mg kg-1 and 112.6 mg kg-1, respectively; whereas the average content in the soils of Kielce oscillates at the level of 134.2 mg kg-1 for zinc and 92.85 mg kg-1 for lead. Geochemical indices, such as the geoaccumulation index (Igeo), contamination factor (CF) and accumulation index (AI) indicated that areas located in close proximity to the main roads of the city, especially in the city centre and the former industrial estate called Białogon, are characterised by the highest concentration of the analysed heavy metals. Generally, the enrichment of soils in zinc and lead decreases further from the city centre. In most cases, the content of the analysed heavy metals in surface layers of urban soils considerably exceeded values considered as geochemical background and valid legal norms of the Ordinance of the Minister of Environment on soil quality standards and land quality standards (Journal of Laws of 2002, No. 165, item 1359). The exceeded values of the analysed metals are caused mainly by deposition of contamination from car exhaust emissions and broadly defined industry.
Badania prowadzono w celu określenia, czy inokulacja grzybami tworzącymi mikoryzę arbuskularną (AMF) i stosowanie kompostu poprawi tolerancyjność szałwii omszonej na NaCl, CaCl2 i Na2CO3. Rośliny nieinokulowane i inokulowane AMF uprawiano w podłożu bez kompostu i w podłożu wzbogaconym w kompost i traktowano NaCl, CaCl2 i Na2CO3 w stężeniu 0, 11,68 i 23,36 g∙dm-3. Traktowanie NaCl nieznacznie obniżało suchą masę i znacznie hamowało wzrost elongacyjny pędów, opóźniało kwitnienie szałwii oraz obniżało procent zasiedlenia korzeni przez grzyby mikoryzowe. Traktowanie CaCl2 wpływało niekorzystnie na suchą masę roślin inokulowanych i uprawianych w podłożu z dodatkiem kompostu, ale nie wpływało na wysokość roślin, termin kwitnienia i liczbę kwiatostanów. Traktowanie Na2CO3 obniżało suchą masę szałwii inokulowanej AMF i uprawianej w podłożu z dodatkiem kompostu. Wpływ Na2CO3 na wysokość roślin i liczbę kwiatostanów był niewielki. Mikoryzacja nie wpływała korzystnie na wzrost i kwitnienie szałwii. Dodatek kompostu poprawiał wszystkie parametry wzrostu roślin i zwiększał liczbę kwiatostanów, niezależnie od traktowania roślin solami i inokulacji AMF. Najbardziej szkodliwe dla wartości dekoracyjnej szałwii okazały się traktowania NaCl i Na2CO3 w stężeniu 23,36 g∙dm-3, powodujące nekrozę liści. Traktowanie Na2CO3 w stężeniu 23,36 g∙dm-3 powodowało pojawianie się brązowych plam na liściach dolnych. Zarówno mikoryzacja, jak i dodatek kompostu, stosowane oddzielnie, nie zapobiegały ujemnemu oddziaływaniu testowanych soli na jakość liści szałwi omączonej. Liście szałwii inokulowanej AMF i uprawianej w podłożu z dodatkiem kompostu i podlewanej roztworami CaCl2 lub Na2CO3 w stężeniu 23,36 g∙dm-3 nie miały nekroz i brązowych plam.
The aim of the present work was to establish the effect the Łódź electroplating plant on the content of chromium, zinc, and copper in soil. The soil samples for analysis were collected from the surface layer within the border of the city of Łódź. The following general properties of the agricultural soil used for the study were determined: pH, organic matter content, and mechanical analysis. The concentration of each of the metals was determined in soil extract or mineralizate by FAAS. The results indicate that the metals content in soil samples collected in the area of the city of Łódź depends on the type of processes carried out in the plating and from its location in the city.
Monitoring the pollution status of the environment by using plants is one of the main topics of environmental biogeochemistry. The bioavailability and mobility of heavy metals (Zn, Cu, Pb, Cd and Ni) in urban soil of Poznań (Poland) were assessed on the basis of upper parts of dandelion (Taraxacum officinale WEB) and soil samples collected in May and July 1998. Sampling points were located along 2 roads crossing the town along West-East and North-South directions. All soils were characterized by a negligible share of clay particles, high content of organic carbon (about 1.5 g kg-1) and pH above 7.0.
This study was conducted in order to determine if inoculation with arbuscular mycorrhizal fungi (AMF) and soil amendment with compost would enhance the tolerance of fountain grass to high level of salinity and alkalinity found in urban soils. AMF-inoculated and non-inoculated plants were planted in growing media non-amended and amended with compost and irrigated with water containing 3.3 g NaCl∙dm-3, 10.5 g Na2CO3∙dm-3, or 6.3 g CaCl2∙dm-3. Electrical conductivity (EC) of each watering solution was 6.3 S∙m-1. Plants were watered with salty waters every week until some leaves were necrotic. All the investigated salts decreased the decorative value of fountain grass and the percentage of root colonization by AMF. NaCl and Na2CO3 also decreased the dry matter of plants. Mycorrhization improve growth parameters and aesthetic value of fountain grass treated with all the tested salts and cultivated without compost supply. Compost supply was beneficial for fountain grass growth and quality if plants were cultivated in substrates unpolluted with NaCl, CaCl2, and Na2CO3.
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