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Дисертації з теми "Spatial distribution of heavy metals"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Liberti, Michael F. "Spatial distribution of heavy metals in Center Township, Delaware County surface soils." Virtual Press, 1998. http://liblink.bsu.edu/uhtbin/catkey/1115430.

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Numerous urban soils surrounding industrial and metallurgical facilities in the U.S. are contaminated with metals including lead (Pb), cadmium (Cd), copper (Cu), Zinc (Zn), chromium (Cr), and nickel (Ni). Simplified geochemical mapping requires soil sampling and analysis for the presence of heavy metals from a grid pattern within a geographic area. In this study, a contour map of metal concentrations at two depths was subsequently superimposed over a standard political map to indicate areas of elevated metal concentrations in the soil. Natural levels of Pb, Cd, Cu, Zn, Cr, and Ni in Delaware C

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2

Kampezidou, Dimitra. "Spatial distribution of heavy metals in surface marine sediments in the Mediterranean region." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111066.

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Several scientific articles were mainly reviewed from Umeå’ s university database in order to determine the distribution, degree of contamination, and the sources of 7 selected heavy metals (Cr, Pb, Cu, Zn, Cd, Hg, Ni) in surface sediments along the coasts of the Mediterranean Sea. The Enrichment factor (EF) was used as pollution indicator to evaluate the extent of metal contamination in all the investigated areas. According to Abrahim and Parker (2008) the EF is defined as the ratio of the determined metal to Al (or Fe) in the sample divided by the ratio of background metal to background Al (

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3

Benamer, Mustafa Alarabi. "Chemical speciation and spatial distribution of heavy metals and their adsorption onto sediments of the Berg River, Western Cape, South Africa." Doctoral thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13167.

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Includes bibliographical references.<br>The Berg River, Western Cape, South Africa, is an example of a catchment region where human pressures and conservation of natural resources collide. The river receives effluents from two large settlements and several smaller adjacent villages, including that of industrial and extensive agricultural activity. The estuary is one of the largest in South Africa and rated as the third most important conservation zone in the country. In this study, the chemical speciation of heavy metals in the river sediment was determined in order to evaluate the extent of p

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4

Al-Ibrahim, Zahid Omar Mustafa. "Investigation of pollution coming from copper, lead, and zinc mining, and factors controlling mobility and bioavailability of pollutants at Ecton Hill, Staffordshire, UK." Thesis, University of Wolverhampton, 2017. http://hdl.handle.net/2436/621722.

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Former mining areas are well-known globally to be a significant anthropogenic source of contaminants being dispersed into the surrounding environment. Various human activities, including ore mineral mining, industrial activities, domestic waste production, and the agricultural application of fertilisers and pesticides, are likely to contribute to the release of huge amounts of potentially toxic metals into the ecosystem, which have harmful effects on the flora and fauna and on human health. Therefore, the main aim of this study is to evaluate the contamination that arises from some selected he

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5

Andong, Omores Raissa. "Spatio-temporal distribution of polycyclic aromatic hydrocarbons (PAHs) in soils in the vicinity of a petrochemical plant in Cape Town." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2432.

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Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2016.<br>Polycyclic aromatic hydrocarbons (PAHs) are an alarming group of organic substances for humans and environmental organisms due to their ubiquitous presence, toxicity, and carcinogenicity. They are semi-volatile substances which result from the fusion of carbon and hydrogen atoms and constitute a large group of compounds containing two to several aromatic rings in their molecule. Natural processes and several anthropogenic activities involving complete or incomplete combustion of organic substances such as coal, fossi

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6

FERNANDES-VANDERLEI, LAZARO. "Etude geochimique des sediments marins actuels d'une cote a plateau continental etroit : exemple des alpes maritimes." Nice, 1987. http://www.theses.fr/1987NICE4120.

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On etudie les sediments recents de l'interface dans la baie des anges, la baie de villefranche-sur-mer et dans la reserve sous-marine du larvotto au large de monaco, afin de mettre en evidence les relations existant entre les processus diagenetiques et lithologiques d'une part et les proprietes physico-chimiques des sediments d'autre part. On observe en particulier la qualite de la matiere organique presente dans l'eau et les sediments ainsi que les relations entre m. O. Ou ses produits de desintegration et les metaux-traces. On analyse les variations spatio-temporelles des teneurs en sels nut

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7

Milton, Adrian Mark. "Heavy metals in contaminated grassland ecosystems : distribution, transfer and effects." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266222.

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8

Napan, Katerine. "Distribution of Heavy Metals from Flue Gas in Algal Bioreactor." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/4018.

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Algae are microscopic organisms with a great potential to produce biomass and lipids at productivities several times higher than terrestrial crops. To grow, these organisms consume carbon dioxide (CO2), a greenhouse gas. This gas, emitted primarily by power plants after coal burning, can be effectively used for algae production, thus resulting in CO2 remediation and biomass beneficial utilization as feedstuff, industrial filler and biodiesel feedstock. However, since coal is a fuel mined from the earth’s crust, it contains heavy metals that are released during coal burning and inevitably enter

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9

Khandoker, Rafiqul Alam. "Distribution of Heavy Metals and Trace Elements in Soils of Southwest Oregon." PDXScholar, 1997. https://pdxscholar.library.pdx.edu/open_access_etds/4691.

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Soil samples from 118 sites on 71 geologic units in southwest Oregon were collected and analyzed to determine the background concentrations of metals in soils of the region. Sites were chosen in areas that were relatively undisturbed by human activities. The U.S. Environmental Protection Agency approved total-recoverable method was used to recover metals from samples for analysis. The twenty six metals analyzed were: Ag, AI, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, La, Li, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Tl, V and Zn. The Klamath Mountains followed by the Coast Range contain the highest soil

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10

Thums, Catherine Rosalie. "Geochemical associations and the spatial distribution of metals in urban soils." Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/8625.

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11

Sancho, Maider. "The spatial distribution of metals in disc galaxies, via simulations and observations." Thesis, University of Central Lancashire, 2017. http://clok.uclan.ac.uk/20925/.

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In this thesis we are interested in the evoluNon of disc galaxies. One of the most common ways to study it is by a deep analysis of the distribuNon of chemical abundances in the stellar populaNons of the disc component. Abundance gradients let us reconstruct the puzzle of the formaNon and evoluNon of this type of galaxies, once we learn about the diﬀerent elements that are released to the interstellar medium at each stage of the life of stars. In this work we pay special aaenNon to the so-‐called thick disc component of spiral galaxies, believing that it is a relic of the early galaxy and its

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12

Murphy, Louise Una. "Quantifying Spatial and Temporal Deposition of Atmospheric Pollutants in Runoff from Different Pavement Types." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2015. http://hdl.handle.net/10092/10467.

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Urban development leads to increased impermeable landscapes that interrupt the hydrological cycle by creating an impermeable barrier to the natural infiltration of precipitation. Precipitate, unable to infiltrate, flows over impermeable surfaces as sheet runoff, carrying the pollutants from the land with it; thus comprising the quality of the stormwater. The runoff is redirected (frequently untreated) to nearby waterways altering their water quality and quantity, thereby, adversely affecting receiving aquatic ecosystems. Suspended solids and elevated heavy metal concentrations in stormwater ar

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13

Åkerblom, Staffan. "Anthropogenic heavy metals in organic forest soils : distribution, microbial risk assessment and Hg mobility /." Uppsala : Department of Environmental Assessment, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200667.pdf.

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14

Rappaport, Bruce D. "Availability and distribution of heavy metals from sewage sludge in the plant-soil continuum." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/71177.

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An investigation was conducted using in situ lysimeters (1.5 m x 2.3 m) to determine Cd, Cu, Ni, and Zn availabilities for barley (Hordeum vulgare L.) and corn (Zea mays L.) grown on four sludge-amended soils. These lysimeters were constructed in Acredale silt loam (Typic Ochraqualf), Bojac loamy sand (Typic Hapludult), Davidson clay loam (Rhodie Paleudult), and Groseclose silt loam (Typic Hapludult) soils. An aerobically digested sewage sludge from a sewage system with major industrial inputs was applied at rates of 0, 42, and 84 dry Mg ha-t to the lysimeters in the poorly-drained Acredale so

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15

Reid, Miriam Katherine. "An Investigation of the Spatial Distribution and Partitioning of Metals in Estuarine Sediments." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499283.

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16

Brady, James P. "Heavy metals in the sediments of Northern Moreton Bay, Queensland, Australia." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/89686/6/89686%28thesis%29.pdf.

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This project was the first comprehensive assessment of heavy metals to be conducted in the sediments of Northern Moreton Bay since the 1970s and found that shipping and shipping related activities contributed significantly to the level of sediment contamination in the area. The study was also used to develop and test new methods of assessing heavy metal sediment quality.

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17

Jordan, Suzanne Louise. "The distribution and geochemical fractionation of heavy metals in anthropogenically-polluted soils and soil phases." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390378.

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18

Brown, Rachel. "The sub-surface distribution of some heavy metals following sewage sludge injection into grassland soils." Thesis, University of Plymouth, 1994. http://hdl.handle.net/10026.1/2079.

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Анотація:

The use of suitable sewage sludge in agriculture is currently its cheapest disposal option, both in terms of monetary cost, resource utilisation and environmental impact Monitoring of die heavy metal content of the soil after sludge application is required by European Council Du-ective 86/278/EEC, and whilst the behaviour of metals from surface-applied sludge is well documented, the behaviour following other methods of application has received litde attention. The most important alternative land application method cturentiy in use is the subsurface injection of sludge. In this project, field-

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19

Luo, Chen. "Distribution and mobilization of heavy metals at an acid mine drainage-affected region, South China." Thesis, Linköpings universitet, Tema Miljöförändring, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-163084.

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Dabaoshan Mine Site (DMS) is the biggest polymetallic mine in South China. The Hengshi River receives acid mine drain (AMD) waste leaching from the tailings pond and run-off from the treatment plant which flows into the Wengjiang River, Beijiang River, before discharging into the Pearl River. Discharge from the mine site results in heavy metal contamination near the mine and lower riparian areas along the river course. The present study focuses on the distribution and mobilization of As, Cd, Pb and Zn along the Hengshi River, groundwater, fluvial sediments and soil, with a special focus on As

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20

Gaber, Noha. "Development of a mechanistic model to assess the distribution of heavy metals in municipal wastewater treatment." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342771.

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21

Finale, Carolina. "Distribution of heavy metals in the Antarctic marine environment: possible relationships between aerosol, seawater and phytoplankton." Doctoral thesis, Università Politecnica delle Marche, 2015. http://hdl.handle.net/11566/242944.

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Abstract Distribuzione dei metalli pesanti in ambiente Antartico marino: possibili relazioni tra aerosol, acqua di mare e fitoplancton Il progetto del mio lavoro di dottorato ha riguardato lo studio della distribuzione dei metalli pesanti Cd, Pb e Cu in ambiente antartico marino (mare di Ross), in particolare nell’aerosol marino, nell’acqua di mare e nel fitoplancton. La presenza di metalli pesanti nel sistema marino antartico, in particolar modo di metalli tossici come Pb e Cd, dipende da diversi fattori, tra i quali il più importante è la deposizione con l’aerosol. I metalli pesanti

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22

Magno, Melissa A., Ingrid Luffman, Arpita Nandi, and Brian G. Evanshen. "SPATIAL INTERPOLATION OF HEAVY METAL CONCENTRATIONS IN SOILS OF BUMPUS COVE, TN." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/126.

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Mining processes generate waste rock, tailings, and slag that can increase heavy metal concentrations in soils. Un-reclaimed, abandoned mine sites are particularly prone to leaching these contaminants, which may accumulate and pose significant environmental and public health concerns. The characterization and spatial delineation of heavy metals of such soils is vital for risk assessment and soil reclamation. Bumpus Cove, once one of the richest mineralized districts of eastern TN, is home to at least 47 abandoned, un-reclaimed mines that were all permanently closed by the 1950s. This study eva

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23

Diouf, Aissatou. "Effect of Organic Amendments on Heavy Metal Distribution and Uptake in Vegetable Gardens in Senegal." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73036.

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The major constraints to food production in West Africa are related to the lack of suitable lands. Consequently, farmers incorporate organic amendments and wastewater to improve their yields. Within some limits, such wastes enhance soil fertility and can improve its physical properties. However, the advantages of using organic waste as fertilizer and soil amendment should be assessed with possible environmental and toxicological impacts due to the potential presence of heavy metals. The objective of this study was to assess the effect of organic amendments on heavy metal distribution in soils

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24

McConway, Alex. "The effects of trace metals on juvenile cockles (Austrovenus stutchburyi)." Thesis, University of Canterbury. Biological Sciences, 2008. http://hdl.handle.net/10092/1696.

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This thesis investigated the population structure and spatial distribution of the cockle Austrovenus stutchburyi in estuaries and bays around the Canterbury coastline. Surveys investigated population attributes (average density and density of small cockles (< 10mm)) of Austrovenus stutchburyi in relation to physical environmental characteristics such as trace metals (copper, cadmium and zinc), sediment particle size, nitrogen and phosphorus levels, pore water and percentage organic matter of the sediment. Surface cover of flora and number of fauna present was also correlated with the density

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25

Sultan, Khawar University of Ballarat. "Distribution of arsenic and heavy metals in soils and surface waters in Central Victoria (Ballarat, Creswick and Maldon)." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/12767.

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"Three sampling campaigns were conducted in the Ballarat, Creswick and Maldon areas. The sampling area is part of the Golden Triangle region where significant gold-mining activities took place from the 1850s to the present day. [...] Locations were chosen to evaluate arsenic distribution in soils, surface waters and plants in different environments. Easy access to sampling locations allowed detailed scientific sampling, especially in the seasonality study. The different range of environments such as agricultural, state forest, mining, urban and rural provided an opportunity to compare the conc

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26

Sultan, Khawar. "Distribution of arsenic and heavy metals in soils and surface waters in Central Victoria (Ballarat, Creswick and Maldon)." Thesis, University of Ballarat, 2006. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/32792.

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"Three sampling campaigns were conducted in the Ballarat, Creswick and Maldon areas. The sampling area is part of the Golden Triangle region where significant gold-mining activities took place from the 1850s to the present day. [...] Locations were chosen to evaluate arsenic distribution in soils, surface waters and plants in different environments. Easy access to sampling locations allowed detailed scientific sampling, especially in the seasonality study. The different range of environments such as agricultural, state forest, mining, urban and rural provided an opportunity to compare the conc

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27

Sultan, Khawar. "Distribution of arsenic and heavy metals in soils and surface waters in Central Victoria (Ballarat, Creswick and Maldon)." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/15387.

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"Three sampling campaigns were conducted in the Ballarat, Creswick and Maldon areas. The sampling area is part of the Golden Triangle region where significant gold-mining activities took place from the 1850s to the present day. [...] Locations were chosen to evaluate arsenic distribution in soils, surface waters and plants in different environments. Easy access to sampling locations allowed detailed scientific sampling, especially in the seasonality study. The different range of environments such as agricultural, state forest, mining, urban and rural provided an opportunity to compare the conc

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28

Paveley, C. F. "Heavy metal sources and distribution in soils, with special reference to Wales : Background ranges, threshold concentrations and sources of lead, zinc, copper, cadmium, cobalt, nickel, manganese and iron in A and B soil horizons." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233744.

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29

Dilks, Caroline Frances. "Spatial variation and behaviour of heavy metals (Pb and Zn) in the urban soils of north-central Newcastle, Tyneside." Thesis, Northumbria University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323471.

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30

Groves, Sarah Anne Biological Earth &amp Environmental Sciences Faculty of Science UNSW. "Spatial and temporal variation in the hydrochemistry of marine prawn aquaculture ponds built in acid sulfate soils, Queensland, Australia." Publisher:University of New South Wales. Biological, Earth & Environmental Sciences, 2008. http://handle.unsw.edu.au/1959.4/43273.

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Many brackish water aquaculture ventures in Australia and overseas have established ponds in coastal regions with acid sulfate soils (ASS). Acid sulphate soils are known to leach relatively high concentrations of metals, acid (metal and H+ ion) and sulfur, however very little is known about how these leached elements affect the water quality of aquaculture ponds. The main objective of this thesis was to describe the hydrochemical processes controlling the water chemistry in the water column and sediment pore water in the studied aquaculture ponds over time and space. Water samples providing th

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31

Wu, Chuan. "Effects of radial oxygen loss (ROL) on arsenic tolerance, uptake and distribution by rice (Oryza sativa L.)." HKBU Institutional Repository, 2011. http://repository.hkbu.edu.hk/etd_ra/1246.

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32

Raulinaitis, Mindaugas. "Effects of Hydromechanical Lake Remediation on Distribution of Metals and Metalloids in Bottom Sediments." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090648-54420.

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Although hydromechanical lake remediation projects have been carried out over several decades, there still is a lack of evidence about the changes in environmental status after such projects, while scientific literature regarding redistribution of metals and metalloids caused by hydromechanical bottom sediment removal is especially scarce both in Lithuania and in other countries. Research of the dissertation consisted not only of extensive geochemical field work and laboratory analysis, but also methods of mathematical statistics and spatial interpolation. Results of the research and their ana

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33

Chatter-Singh, Davene Naomi. "Spatial and temporal analysis of heavy metals in surface waters, bed sediments and suspended sediments of the River Stour, East Kent, U.K." Thesis, University of Greenwich, 2008. http://gala.gre.ac.uk/8393/.

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A baseline study has been undertaken to assess the environmental impact of heavy metals within the fluvial environment of the River Stour, E. Kent, U.K. The occurrence of metal enrichment in surface waters and bed sediments coincides mainly with areas of urbanisation and high density traffic in addition to point source discharges including STW and industrial effluent outlets. Non-tidal surface water samples exhibiting Pb, Co, Cu, Fe and Zn concentrations intermittently elevated above EQS List I and II values largely correspond with bed sediment samples exhibiting metal concentrations above bac

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34

Theodory, Ronnie George. "The distribution of stable isotopes and heavy metals in Dreissena polymorpha (zebra mussel), chemical tracers for environmental contamination in Lake St. Clair." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0009/MQ52747.pdf.

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35

Snyman, Reinette Georgenie. "The uptake and distribution of selected heavy metals in the freshwater crab, Potamonautes perlatus (Milne Edwards), in the Eerste River, Western Cape." Thesis, Stellenbosch : University of Stellenbosch, 1996. http://hdl.handle.net/10019.1/1630.

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Thesis (MScAgric (Zoology))--University of Stellenbosch, 1996.<br>A number of studies on the general physico-chemical character of the Eerste River, Western Cape, had previously been done, but the problem of heavy metal pollution had, by 1993, not been addressed. A study was therefore undertaken from 1993-1995 in order to investigate these aspects. Since several researchers have shown that freshwater crabs accumulate certain heavy metals in their bodies and may therefore be used as monitors of environmental heavy metal pollution, the present study concentrated mainly on metal concentratio

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36

Olujimi, Olanrewaju Olusoji. "The concentrations, distribution and health risk assessment of suspected endocrine disrupting chemicals (phenols, phthalates and heavy metals) in freshwater systems of Cape Town, South Africa." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/2009.

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Thesis (DTech (Environmental Health))--Cape Peninsula University of Technology, 2012.<br>Environmental pollution with persistent organic chemicals and inorganic trace metals is an increasingly important issue. Recently, a variety of chemicals are introduced in a very large scale on the surface water network. The main pathway of these pollutants into the environment was identified as wastewater treatment plants (WWTPs). The extended use of chemicals in many product formulations and insufficient WWTPs has lead to an increase in the levels of the detected micro-pollutants wastewater effluent

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37

Soares, Marcio Roberto. "Coeficiente de distribuição (Kd) de metais pesados em solos do estado de São Paulo." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-31052005-170719/.

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A disposição de resíduos sólidos e a aplicação de pesticidas e fertilizantes podem levar ao aumento da concentração de metais pesados em solos e águas subterrâneas. A legislação sobre metais pesados quase sempre se refere aos seus teores totais, mas a avaliação do potencial de risco e da toxicidade requer a avaliação da proporção de metal que é móvel e, possivelmente, biodisponível. Alguns parâmetros numéricos têm sido utilizados para tomadas de decisões e para direcionar estratégias de prevenção ou de remediação de áreas contaminadas. O coeficiente de distribuição sólido-solução (Kd), defin

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38

Moral, Cigdem. "Production Of Alginate From Azotobacter Vinelandii And Its Use In Water And Wastewater Treatment." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612919/index.pdf.

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Alginates are copolymers of &beta<br>-D-mannuronic (M) and &alpha<br>-L-guluronic acids (G). In this study, Azotobacter vinelandii ATCC&reg<br>9046 was used to produce alginate in a fermentor. The effect of parameters such as dissolved oxygen tension (DOT), agitation speed, initial concentrations of sucrose and calcium on the properties of alginate were examined. Changes of DOT in the range of 1 and 10 % affected alginate production. The optimum DOT giving high alginate yield (4.51 g/L) and maximum viscosity was observed as 5 % yielding moderate GG-blocks of 55 %. Both high and low agitation l

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Raulinaitis, Mindaugas. "Hidromechaninio ežerų valymo įtaka metalų ir metaloidų pasiskirstymui dugno nuosėdose." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090639-11076.

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Nors hidromechaninio ežerų valymo darbai vykdomi jau daugelį metų, iki šiol nėra aišku, kaip pasikeičia ežero aplinkosauginė būklė po jo išvalymo, o Lietuvos ir kitų šalių mokslinėje literatūroje informacijos apie valymo sąlygotus metalų ir metaloidų pasiskirstymo dugno nuosėdose pokyčius yra stebėtinai mažai. Disertacijos tyrime buvo taikoma kompleksinė šių pokyčių vertinimo sistema, pasitelkiant ne tik išsamius geocheminius lauko ir laboratorinius tyrimus, bet ir matematinę statistinę analizę bei erdvinę duomenų prognozę ir interpoliaciją. Tyrimų ir analizės rezultatai parodė, kad hidromecha

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Syrovetnik, Kristina. "Long-term metal retention processes in a peat bog : Field studies, data and modelling." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-460.

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Milenija, Marković. "Model unapređenja ekološkog statusa zatvorenog sistema vodnih tela akumulacija." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=95401&source=NDLTD&language=en.

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Eksperimentalnim istraživanjem u okviru doktorske teze utvrđen je trend promene fizičko-hemijskih parametara: mutnoća, temperatura, provodljivost i pH vode, koncentracija katjona Cd2+, As3+, Hg2+ i Pb2+, ukupnog azota, fosfora i sulfatnog ajona u vodi i sedimentu, na lokalitetu Zapadne Srbije, slivno područje akumulacije Vrutci u 2003/2014. Rezultati istraživačkih aktivnosti predstavljali su osnovu za razvoj regresionog modela kojim se može predvideti koncentracija katjona teških metala u jezerskoj vodi. Primenom klaster analize, dendograma i PCA analize dobijena su tri faktora na osnovu kojih

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Šindelářová, Anna. "Analýza zubů a kostí metodou spektroskopie laserem buzeného plazmatu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-445149.

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The presented diploma thesis deals with the elemental composition of hard tissues – human and murine jaws studied by laser-induced plasma spectroscopy (LIBS). Samples of human teeth contained a disease called ankylosis and the difference in elemental composition of healthy and diseased tissue was observed to localize ankylosis in the tooth. When evaluating the map of the spatial distribution of phosphorus and calcium, a decrease in the concentration of these elements in the ankylosis infected area was observed. Furthermore, murine jaws containing lead were analyzed. When assessing the spatial

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Liu, Xintao. "The Principle of Scaling of Geographic Space and its Application in Urban Studies." Doctoral thesis, KTH, Geodesi och geoinformatik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90832.

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Geographic space is the large-scale and continuous space that encircles the earth and in which human activities occur. The study of geographic space has drawn attention in many different fields and has been applied in a variety of studies, including those on cognition, urban planning and navigation systems. A scaling property indicates that small objects are far more numerous than large ones, i.e., the size of objects is extremely diverse. The concept of scaling resembles a fractal in geometric terms and a power law distribution from the perspective of statistical physics, but it is different

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Aleksandra, Mihailović. "Fizičke karakteristike zemljišta i distribucija teških metala na gradskom području Novog Sada." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=94955&source=NDLTD&language=en.

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Uzorci zemlji&scaron;ta iz pov&scaron;inskog sloja dubine 0 - 10 cmprikupljeni su sa 121 lokacije na gradskom području NovogSada. Ispitivano područje obuhvatilo je povr&scaron;inu (4 x 5)km<sup>2</sup>,koja je podeljena na mrežna polja veličine (400 x 400) m<sup>2 </sup>i u          svakom polju uzet je po jedan uzorak. Za 121 uzorakgradskog zemlji&scaron;ta Novog Sada ispitana su fizičko-hemijskasvojstva zemlji&scaron;ta, ukupni i pristupačni sadržaj metala (As,Co, Cr, Cu, Mn, Ni, Pb, Zn) i njihova prostorna raspodela.Konturne mape prostorne r

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SANTOS, DIOGO F. dos. "Caracterização dos campos neutrônicos obtidos por meio de armadilhas de nêutrons a partir da utilização de água pesada (D2O) no interior do núcleo do reator nuclear IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23825.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2015-07-23T11:04:17Z No. of bitstreams: 0<br>Made available in DSpace on 2015-07-23T11:04:17Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Colombàs, Borràs Margalida. "Nivells d'elements traça i macroelements als sòls de les Illes Balears." Doctoral thesis, Universitat de les Illes Balears, 2014. http://hdl.handle.net/10803/663752.

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[cat] S'estudia l’estat actual del contingut de set macroelements (Ca, Mg, Al, Fe, K, Na i P) i nou elements traça (As, Cd, Co, Cr, Cu, Mn, Ni, Pb i Zn) en els sòls de les Illes Balears. A partir de la determinació del contingut total de macroelements i elements traça mitjançant la digestió de les mostres de sòl per via humida amb aigua règia i s’estudien les relacions que hi ha entre ells i amb les característiques fisicoquímiques del sòl. També s’estudia el comportament dels elements en funció de l’illa, la profunditat i a una sèrie de sòls representatius de les Illes Balears. Finalment, s’e

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ROGER, BERTRAND. "Repartition et localisation des metaux traces dans les sediments : application a l'estuaire de la loire." Nantes, 1987. http://www.theses.fr/1987NANT2021.

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La premiere partie methodologique porte sur la validite des schemas de mineralisations selectives actuels. La comparaison de deux schemas permet de mettre en evidence l'importance des readsorptions en cours de mineralisation sur les phases encore presentes. Il est necessaire de conserver a l'echantillon toute son integrite lors des attaques effectuees pour determiner la disponibilite vraie des metaux. La deuxieme partie traite du comportement des metaux lies au sediment dans l'estuaire de la loire. La covariance des teneurs en metaux avec la granulometrie et le carbone organique reste bonne to

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Cheng, Bai-You, and 鄭百佑. "Estimating Spatial Distribution of Heavy Metals in Soil." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/12257077974194451289.

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碩士<br>國立臺灣大學<br>生物環境系統工程學系暨研究所<br>90<br>By combination of the semi-variogram of Kriging Method with Fuzzy theory, in order to set up a Membership Function, and the new spatial interpolation method was named Fuzzy Estimate. It has a clear principle, simple in structure, provides more flex adjusted with more reasonable physics phenomenon. By applying this new interpolation method, the spatial distribution of heavy metal in soil can be predicted more precisely. By comparison Fuzzy Estimate with the ordinary Kriging Method, Radial Basis Function(RBF) and the other three traditional spat

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Zhuang, Kai Wei, and 莊愷瑋. "Prediction of spatial distribution of heavy metals in contaminated soils by geostatistics." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/09990711972666265318.

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碩士<br>國立臺灣大學<br>農業化學研究所<br>83<br>The objectives of this study are using geostatistics and traditional statistical methods to predict the spatial dis- tribution of heavy metal in contaminated soils and to search for the most efficient sampling strategy for contaminated site characterization.Two study sites located at Tou-Yuan County were selected. The spatial distribution of soil Cd, Pb and Zn concentrations were predicted by kriging in this study. The results showed that the spatial distribution of t

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Wang, Yun-Yih, and 王允義. "Identification of Spatial Distribution of Heavy Metals in Cont aminated Soils by Geostatistical Method." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/89440989574728857628.

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碩士<br>國立臺灣大學<br>農業工程學系<br>84<br>The purpose of this research is trying to find out the soil contaminated sites in Taiwan. First, the surveyed data of 1600 ha-grid and the tentative threshold of the monitoring and control values which EPA suggests are compared. Second, the Kriging me- thod of geostaistics is used to find out the best semivariogram and concentration contour in each county. Finally, the contami- nated sites are identified. The results shows that up to 13 counties among the 15

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