Bibliografías temáticas / Heavy metals Estuarine pollution Estuarine sediments

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Literatura académica sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Noegrohati, Sri. "SORPTION-DESORPTION CHARACTERISTICS OF HEAVY METALS AND THEIR AVAILABILITY FROM THE SEDIMENT OF SEGARA ANAKAN ESTUARY". Indonesian Journal of Chemistry 5, n.º 3 (15 de junio de 2010): 236–44. http://dx.doi.org/10.22146/ijc.21797.

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Estuarine sediments are increasingly recognized as both a carrier and a possible source of heavy metals in pollution of aquatic ecosystems. The bioavailability of heavy metal from sediments, however, is a long-standing impediment of questions in determining the metal effects in ecosystems. The fraction considered as available heavy metal are both the dissolved heavy metal and the exchangable cations. The main objective of this study is to understand the extent of heavy metal availability from sediments in estuarine ecosystem. It was found that the availability of heavy metals, i.e. copper, zinc, cadmium, and mercury in the estuarine ecosystem investigated, are governed by the relative strength of the electrostatic attraction of their complexation to the ligands present both in the sediment and the overlaying waters. Under simulated estuarine ecosystem, it was observed that Cu and Zn prefer to form organo-complex through ligand exchange, while Cd and Hg tend to form chloro-complex through electrostatic interaction. Therefore, the availability of Hg and Cd is higher in more saline overlaying water. On the contrary, the availability of Cu and Zn is lower in more saline overlaying waters, as indicated by their respective water-sediment distribution coefficient, KD. Similar behaviour of heavy metal was observed in natural field conditions of Segara Anakan estuary. Due to the higher salinity of the overlaying water, the availability of Cd and Hg in dry season was higher than in wet season, while Zn was more available in wet season due to the higher input of organic matters from the inland. The patterns of heavy metal release from the sediment are consistent to that obtained in experiments of the undisturbed simulation, where highest release was obtained for Cd. Surprisingly, it was found that even though Cd was not detected in the sediment, higher level of Cd in water medium was observed in dry season, and Cu seems to retain in the sediment in both dry and wet seasons. Compared to the unextractable fraction, the extractable was very low, therefore Geloina sp. was used as biomonitor for dissolved Cd and Hg, and Zn in sediment. Generally, the heavy metal concentration in Geloina sp. was higher in dry season than in wet season, but no Cu uptake was detected. Therefore, the establishment of limit values of heavy metals in sediment is highly recommended. Keywords: heavy metal, sorption-desorption, estuary, availability.
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2

Moles, N. R., S. M. Betz, A. J. McCready y P. J. Murphy. "Replacement and authigenic mineralogy of metal contaminants in stream and estuarine sediments at Newtownards, Northern Ireland". Mineralogical Magazine 67, n.º 2 (abril de 2003): 305–24. http://dx.doi.org/10.1180/0026461036720103.

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Tidal mudflats are locally enriched in heavy metals at the head of Strangford Lough in Northern Ireland, where drainage from the hinterland enters the sea lough via a tidal canal in an urban area. To characterize the metallic contaminants and investigate their provenance, heavy particles separated from stream, canal and estuarine sediments were analysed by electron microprobe and laser Raman microspectroscopic methods. Potential metal sources are mineralization in the catchment area and industrial or domestic pollution. Anthropogenic particles include metallic grains, alloys and compounds of Pb, Zn, Cu, Fe, Cr and Sn. Alteration of metallic particles includes de-zincification of brass in freshwater sediment and replacement of Cu wire by covellite in brackish to marine sediment. Mobility of Cu, Fe and S in canal and estuarine sediments is indicated by the authigenic growth of framboidal Fe sulphide on oxide substrates and of chalcopyrite rims on covellite. Intricate colloform and platy crystalline textures suggest a cyclical deposition of covellite and chalcopyrite under conditions of varying redox and salinity. Lead and Cr mobility in the contaminated estuarine sediment is shown by the authigenic formation on Pb-rich substrates of heterogeneous Pb- and Cr-rich sulphate-phosphate compounds and Pb-oxychlorides.
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3

Hong, Hualong, Binghuang Zhang y Haoliang Lu. "Seasonal Variation and Ecological Risk Assessment of Heavy Metal in an Estuarine Mangrove Wetland". Water 13, n.º 15 (29 de julio de 2021): 2064. http://dx.doi.org/10.3390/w13152064.

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Potential toxic metal pollution in mangroves has attracted extensive attention globally; however, the seasonal variation of potential toxic metals in mangrove wetlands is still poorly understood. Herein, we investigated the variation of content as well as chemical speciation of typical metals (Pb, Cr, Zn and Cu) in the sediments from the Zhangjiang Estuary mangrove wetland, China. The potential risk of metal contamination was also investigated. Compared to the wet season, we found that sediment metal content was higher in the dry season. Mangrove sites show accumulated significant metals than does the mudflat both in wet and dry seasons. Geo-accumulation (Igeo) shows moderate pollution, probably because of the dilution as result of runoff and tidal hydrodynamics in the wet season. Increased concentrations of all metals in the acid-soluble fraction and decreased metal contents in the residue fraction were found in the dry season. Risk assessment indicated that the concentrations of Pb poses a higher environmental risk in the dry season. These results can increase awareness of metal pollution in the dry season and provide information for potential toxic metal management in mangrove wetlands.
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Sharifi, A. R., I. W. Croudace y R. L. Austin. "Benthic foraminiferids as pollution indicators in Southampton Water, southern England, U.K." Journal of Micropalaeontology 10, n.º 1 (1 de agosto de 1991): 109–13. http://dx.doi.org/10.1144/jm.10.1.109.

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Abstract. A study of heavy metals in estuarine sediments and foraminiferal tests along with foraminiferal distributions from Southampton Water indicates that:a) heavy metals have a marked effect upon foraminiferid distribution. Some species are able to tolerate pollution and their relative abundance increases at discharge points, whereas other species develop test deformities. Investigation of cores show that no deformed specimens exist within sediments prior to the introduction of pollution.b) deformed specimens contain higher levels of elements such as Cu and Zn than non-deformed specimens. This indicates that heavy metals may be responsible for the abnormalities within foraminiferid tests. Culture experiments support this hypothesis. Specimens of Ammonia beccarii (Linné) developed abnormal chambers over a period of 12 weeks within a culture medium containing 10–20ppb of Cu.
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Senten, J. R. y R. H. Charlier. "Heavy metals sediments pollution in estuarine and coastal waters: corrective measures for existing problems". International Journal of Environmental Studies 37, n.º 1-2 (enero de 1991): 79–96. http://dx.doi.org/10.1080/00207239108710619.

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Brayner, Fátima Maria Miranda, Hélida Karla Philippini da Silva y Ana Maria de Freitas Barbosa. "Speciation of heavy metals in estuarine sediments in the northeast of Brazil". Environmental Science and Pollution Research 8, n.º 4 (julio de 2001): 269–74. http://dx.doi.org/10.1007/bf02987405.

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Arienzo, Michele, Francesco Bolinesi, Giuseppe Aiello, Diana Barra, Carlo Donadio, Corrado Stanislao, Luciano Ferrara et al. "The Environmental Assessment of an Estuarine Transitional Environment, Southern Italy". Journal of Marine Science and Engineering 8, n.º 9 (19 de agosto de 2020): 628. http://dx.doi.org/10.3390/jmse8090628.

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A multidisciplinary survey was carried out on the quality of water and sediments of the estuary of the Sele river, an important tributary of the Tyrrhenian Sea, to assess anthropogenic pressures and natural variability. Nine sediment sites were monitored and analyzed for granulometry, morphoscopy, benthic foraminifera and ostracod assemblages, heavy metals, and polycyclic aromatic hydrocarbons. Surface water was assayed for ionic composition and phytoplankton biomass. Total organic carbon (TOC) and total nitrogen (TN) in sediments were higher in the inner part of the estuary (IE), up to 12.7 and 0.7% because of anthropic influence. In waters, N-NH4, N-NO3, and Ptot. were high, with loads of Ptot in IE exceeding ~fourfold the limit. Here, it was also observed that the highest primary production was Chl-a, 95.70 µg/L, with cryptophytes, 37.6%, and diatoms, 33.8%, being the main phytoplanktonic groups. The hierarchical analysis split the estuary into two areas, with marked differences in anthropic pollution. Waters were classified as poor–bad level with respect to the content of nutrients. Sedimentological assay reveals littoral erosion and poor supply of river sandy sediments. The erosion environment is confirmed by the presence of meiobenthic recent marine forms intrusion inside the river. All these data reveal the fragility of the estuary and the need of urgent remediation actions.
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Vane, Christopher H., Grenville H. Turner, Simon R. Chenery, Martin Richardson, Mark C. Cave, Ricky Terrington, Charles J. B. Gowing y Vicky Moss-Hayes. "Trends in heavy metals, polychlorinated biphenyls and toxicity from sediment cores of the inner River Thames estuary, London, UK". Environmental Science: Processes & Impacts 22, n.º 2 (2020): 364–80. http://dx.doi.org/10.1039/c9em00430k.

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Khamar, M., E. Cherkaoui y A. Nounah. "Bioaccumulation of heavy metals by the flora and benthic macrofauna of the Bouregreg estuary wetland". MATEC Web of Conferences 149 (2018): 02054. http://dx.doi.org/10.1051/matecconf/201814902054.

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Estuarine systems account for a high proportion of wetlands in Morocco due to the development of the river system. These estuarine and coastal Moroccan environments are as rich in fauna and flora as their European equivalents and present much originality. However, these coastal areas are generally highly urbanized and industrialized, and therefore subject to domestic and industrial discharges. The Bouregreg Estuary represents a good example of this situation, in view of this pollution (organic, chemical and biological) and the absence of fresh water supply upstream of the estuary after the dam was built, is increasingly unable of restoring the equilibrium of this ecosystem. This tide can instead ensure the polluting discharge downstream or upstream. Metallic contamination affects the different compartments of the estuarine ecosystem (sediment, water) and benthic species (fauna and flora). The objective of this study is to assess the accumulation and bioaccumulation of five heavy metals (Cu, Fe, Zn, Cr and Pb) at the sediment level of two dominant plant species (Artiplex portulacoides and Sarcocornia fructicosa) and three species of benthic macrofauna (Scrobicularia plana, Venerupis decussata and Hediste diversicolor) from the wetland of this estuary. This work will enable us to clearly understand the nutritional relationships between plant, animal, water and sediment species. The results of the analysis revealed that bioaccumulation varies from one species to another and from one metal to another. Thus, the levels of Lead and Chromium at Sarcocornia fructicosa are higher than those found at Artiplex portulacoides. Nevertheless, the latter accumulates better the other metals: Cu, Zn and Fe. While, the macrofauna shows a fairly large variation depending on the life style and sensitivity of species. Thus, Hediste diversicolor showed high levels of the various metals analyzed compared to Scrobicularia plana and Venerupis decussata.
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Bello, M. A., M. Callejón, J. C. Jimenez, F. Pablos y M. Ternero. "Determination of heavy metals in estuarine sediments by acid digestion and atomic absorption spectrometry". Toxicological & Environmental Chemistry 44, n.º 3-4 (julio de 1994): 203–10. http://dx.doi.org/10.1080/02772249409358058.

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Tesis sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Yang, Meng. "Historical changes in heavy metals in the Yangtze Estuary". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61961.pdf.

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Jemmett, Alan William Lancaster. "An investigation into the heavy metals, sediment and vegetation of a Mersey Estuary salt marsh". Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333688.

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Suwanrut, Jintana. "A study of the use of complexing agents to assess the availability of metals in estuarine sediments". Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297490.

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Claus, Sonia Carmel, University of Western Sydney, of Science Technology and Environment College y of Science Food and Horticulture School. "Heavy metals in biota from temperate Australian estuaries". THESIS_CSTE_SFH_Claus_S.xml, 2003. http://handle.uws.edu.au:8081/1959.7/503.

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The detection of anthropogenic impacts in our estuaries has become a critical social, political and scientific concern in recent years. Work has focussed on the effects of these impacts on the spatial and temporal patterns of biotic assemblages and searched for bioindicators and biomarkers of pollutants that may act as early warning signs. The estuaries in temperate Southeastern Australia have a diversity of biotic assemblages living in the soft sediment. One of the most abundant macroinvertebrates is the little studies mussel, Xenostrobus securi that is found living with an assemblage of benthic biota including amphipods, crabs, isopods and tanaids, bivalves and gastropods. Two commercial fish species bream and mullet also inhabit these estuaries. Numerous stormwater drains can be found entering the estuaries through the mangrove forests lining the shores. Along with inputs of freshwater, stormwater drains are thought to be responsible for the entry of heavy metals into estuaries. These heavy metals have the potential to alter the patterns of biotic assemblages and bioaccumulate in the tissues of miacroinvertebrates, mussels and fish living within temperate estuaries. Over the time of this study the concentrations of heavy metals in the sediment tissues and shell of X.Securis varies spatially and temporally. Although this study adds substantially to current knowledge there is still more that is needed to establish X. Securis as a bioindicator. Questions remain about uptake, depuration and response to environmental gradients of heavy metals in X. Securis. Before X Securis can be used routinely in monitoring heavy metal contamination these questions need to be further investigated
Doctor of Philosophy (PhD)
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Claus, Sonia Carmel. "Heavy metals in biota from temperate Australian estuaries /". View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051013.092820/index.html.

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Thesis (Ph.D.) -- University of Western Sydney, 2003.
"Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy at the University of Western Sydney Hawlesbury" Bibliography : leaves 245-278.
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Rochford, Louisa. "Stormwater heavy metal loadings to Port Jackson Estuary, NSW, Australia". University of Sydney, 2008. http://hdl.handle.net/2123/4087.

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Master of Science
Investigations of fluvial and estuarine sediments have indicated stormwater is an important source of heavy metals to Port Jackson estuary and high concentrations of these sedimentary contaminants are a threat to the healthy functioning of the estuarine ecosystem. Stormwater remediation devices have been installed in stormwater channels entering the estuary, however these devices are mainly for removing gross pollutants and are ineffective in removing heavy metals from stormwater. A thorough characterisation of heavy metal inputs and behaviour has been undertaken by sampling, analysing and modelling heavy metals in stormwater entering Port Jackson estuary to provide a rigorous data base for future remediation efforts. A conceptual model of transport and fate of heavy metals in stormwater entering Port Jackson estuary has also been developed to identify heavy metals, subcatchments and flow regimes requiring remediation, and to assist in designing remediation devices for optimum removal of heavy metals from stormwater. Modelling of stormwater using the Model for Urban Stormwater Improvement Conceptualisation (MUSIC) indicated that the average annual discharge of stormwater from the Port Jackson catchment was 215,307 ML. Average annual loadings of arsenic, cadmium, chromium, copper, nickel, lead and zinc in stormwater discharging to Port Jackson estuary were 0.8, 0.5, 1.7, 3.2, 1.1, 3.6 and 17.7 tonnes per year, although comparison to other studies in the catchment suggests these values may be underestimations of actual loadings by 1.3 to 10 times. The proportion of heavy metals discharged under low-flow conditions (<5mm of rainfall in 24 hours), medium-flow conditions (between 5 and 50mm in 24 hours), and high-flow conditions (>50 mm of rainfall in 24 hours) was 6.5%, 62.5% and 31%, respectively. The conceptual model indicates stormwater loadings of copper, lead and zinc pose a risk to the health of riverine and estuarine ecosystems in the catchment and these metals should be targeted for remediation. Stormwater channels which should be prioritised for remediation include the channels entering southern embayments west of Darling Harbour; Duck, Parramatta and Lane Cove Rivers; and the channels and rivers entering Neutral, Long and Sugarloaf Bays. Stormwater loadings of lead are predominantly associated with suspended particulates, whereas loadings of copper and zinc are equally partitioned between dissolved and particulate phases. Stormwater remediation strategies should target both dissolved and particulate phases to ensure effective removal of copper, lead and zinc. Research suggests heavy metals in stormwater discharged to the estuary under high-flow conditions are rapidly exported seaward and bypass the estuary. Preliminary research also suggests that under medium-flow conditions, particulate heavy metals bypass the embayments of Port Jackson and are deposited in the main channel. Once deposited in the main channel, particulate heavy metals are likely to be remobilised and removed from the estuary through multiple phases of resuspension. Although further research is required in this area, this preliminary research suggests remediation should target low-flow conditions. The findings of the current research could be used to identify appropriate remediation strategies for dissolved and particulate phase heavy metals in stormwater discharging to Port Jackson estuary. However, in designing stormwater remediation devices, consideration should also be given to the range of contaminants that may be present in stormwater entering Port Jackson estuary (including suspended solids, nutrients, pesticides and organics).
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Shimmield, Tracy Marjory. "A study of radionuclides, lead and lead isotope ratios in Scottish sea loch sediments". Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/9988.

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This research involved the study of sediment cores from Loch Etive, Loch Long, Loch Goil and Loch Fyne with the aims of investigating the geochemistry of natural, and manmade radionuclides and heavy metals within the sea loch environment. The main aims of the research were to determine accumulation rates and the extent of mixing within these sediments and to assess the fluxes, sources and temporal variations in input of pollutant heavy metals to these environments. In recent years it has been suggested that Pb is mobile in sea loch sediments which questions the validity of applying ²¹⁰Pb dating in this environment. This has important implications with respect to interpreting sediment cores to assess temporal trends of pollutant inputs and investigating the rates of physical and biogeochemical processes that are taking place in the coastal environment. Hence, one of the aims of this research was to determine whether Pb was mobile in these sediments. The ²⁰⁶Pb/²⁰⁷Pb isotope ratio can potentially be used to determine the extent of pollutant Pb input from leaded petrol to the environment and a further objective of the work was to investigate the isotopic signature of pollutant Pb in the sediment. Concentration of ²¹⁰Pb, ²²⁶Ra, ²²⁸Ra, ²²⁸Th, ²³⁸U, ¹³⁷Cs, ¹³⁴Cs and ²⁴¹Am in the sediments were analysed using gamm a spectroscopy and the heavy metals, Pb, Zn and Cu were determined using X-ray Fluorescence. Stable Pb isotope ratios were determined using Inductively coupled plasma Mass spectrometry. The results obtained indicated that Pb is not subject to diagenetic mobility in these sediments and that ²¹⁰Pb profiles can be used to determine sedimentation rates for most of the sediment cores. lt was not possible to determine accumulation rates for the two cores from Loch Fyne by ²¹⁰Pb dating, and in this case the sedimentation rate was assessed by correlating the maximum concentration of ¹³⁷Cs in the sediments with the maximum ¹³⁷Cs discharge from Sellafield, BNFL's reprocessing plant located on the Cumbrian coast. The flux of ²¹⁰Pb to the lochs varied significantly suggesting that there has been sediment focusing of fine and/or organic rich material to the deeper sites, resulting in an enhanced flux of ²¹⁰Pb to these sediments. Sellafield waste radionuclides also provided useful chronologies by relating sediment maximum concentrations to maxima in the discharges. ¹³⁷Cs was observed to be subject to diffusive movement, invalidating the use of its total depth of penetration as a chronological indicator. The temporal trends of pollutant metal input agreed well with known historical trends and the Pb isotope profiles indicated that the onset of deposition from pollutant Pb from petrol occurred in the late 1920's. The maximum input of Pb from petrol peaked in the early 1980's and since then there has been a decrease in this input. The two sea lochs which were closest to the industrial centre of Glasgow exhibited a large anthropogenic pollutant input, confirming that these sediments have been highly perturbed by human activities, either directly as a result of sludge dumping or due to changes in land use (eg. road construction, deforestation, etc.) in the catchment. All the sea lochs reflected a change in the supply of material to the sediments over the last eighty years, indicating that increased anthropogenic activity has had an effect on these environments.
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Orr, Kyla Kathleen. "Spatial and temporal variations in metals in the sediment and water of selected Eastern Cape Estuaries, South Africa". Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005457.

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The spatio-temporal patterns in concentrations of selected metals within the sediment (Cd, Co, Cu, Fe, Pb, Ni and Zn) and water (Cd and Pb) of three permanently open estuaries (Kariega, Kowie, Great Fish) and six temporary open-closed estuaries (Mpekweni, East Kleinemonde, West Kleinemonde, Riet, Kasouga, Boknes) were investigated. The concentrations of metals were influenced by size composition and total organic content of the sediments. Enrichment factors (EFs), using Fe as a reference element, and baseline linear regression models for metals vs. Fe were calculated to assess the extent of metal enrichment in the sediments. The mean concentrations of metals in the sediments(mg·kg⁻¹) showed ranges of 0.28 – 2.31 for Cd, 1.26 – 6.24 Co, 0.69 – 6.93 for Cu, 2119 – 14912 for Fe, 2.29 –14.01 for Ni, 4.81 – 22.20 for Pb and 5.77 – 21.75 for Zn. Mean normalized enrichment factors ranged between 0.75 – 6.19 for Cd, 0.53 – 2.71 for Co, 0.22 – 0.84 for Cu, 0.30 – 1.87 for Ni, 0.99 – 3.17 for Pb and 0.14 – 0.98 for Zn. All nine estuaries had average enrichment factors of greater than 1 for Cd. In general there was no enrichment of Cu and Zn in the sediments of any of the estuaries included in this study (EFs < 1). The Kariega, East Kleinemonde, West Kleinemonde, Riet and Great Fish Estuaries showed some degree of enrichment for Co (1 < EF < 4), Ni (1 < EF < 2) and Pb (1 < EF < 4), while the Mpekweni, Kasouga, Boknes and Kowie Estuaries were unenriched with these metals (EF < 1). Enrichment factors for Cd, Co and Pb typically followed the development gradient along the estuaries, suggesting anthropogenic enrichment. The concentrations of Cd and Pb in the water of the nine estuaries were also determined. The average concentrations of Cd and Pb in the water (μg·ℓ⁻¹) ranged between 0.05 – 3.32 and 0.75 – 34.13 respectively. On average the concentrations of Cd and Pb in the water of all the estuaries were below the South African recommended water quality guidelines for coastal marine waters. Variations in metal concentrations associated with changes in hydrology (wet vs. dry season) were determined in the water and sediment of the Kariega, East Kleinemonde and Riet Estuaries. Cobalt, Pb and Ni enrichment in the Kariega Estuary sediment was significantly higher during the dry season, and the mean concentrations of Pb and Cd in the water column were 19-fold and 66-fold higher in the dry season. The elevated concentration of metals during the dry season could be related to accumulation of diffuse pollution from human activities within the catchment area. Conversely, inflow of fresh water into the estuary had the net effect of reducing the concentration and enrichment of these metals within the Kariega Estuary due to scouring and outflow of estuarine water and sediment into the marine environment. The temporal variations in metal concentrations and enrichment factors were less pronounced in the temporary open-closed estuaries than the permanently open Kariega Estuary. The observed trend can probably be related to the low anthropogenic impact within the catchment areas of these systems, and the relatively smaller size of the catchments. Significant spatial variations existed in metal enrichment in the sediment of both the East Kleinemonde and Riet estuaries, with the highest degrees of enrichment occurring in the sediments from the marine environment and lower reaches.
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Clegg, Yolanda. "Historical inventory of sedimentary carbon and metals in a Bay of Fundy salt marsh". Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30357.

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In 1996, four cores (∼30 cm depth) were extracted from the high marsh zone of Dipper Harbour salt marsh in the Bay of Fundy. Soil bulk densities are shown to be controlled by mineral density and are higher than those reported for salt marshes in the northeastern United States. Examination of variations in mineral content suggests that regular tidal action and ice rafting deposits the majority of the mineral sediment to the high marsh zone. Dating techniques (based upon pollen, 137Cs, 210Pb and total Pb) were applied to selected cores, suggesting accretion rates from 0.25 to 0.31 cm yr-1 which are higher than the rates of local relative sea level rise. Correlation of trace metal densities (Cu, Fe, Pb and Zn) to Al densities were used to justify Al normalization. After consideration of natural sources and adsorption factors, the normalized Pb profiles are shown to reflect historical pollution levels of leaded gasoline consumption. Carbon storage values in the upper 25 cm of sediment range from 7.3--10.5 kg C m-2 and carbon accumulation rates vary from 95 to 124 g C m-2 yr-1, representing 15--29% of the salt marsh macrophyte productivity.
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Libros sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Duursma, E. K. Are tropical estuaries environmental sinks or sources? Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1995.

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Duursma, E. K. Are tropical estuaries environmental sinks or sources? Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1995.

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Riggs, Stanley R. Heavy metal pollutants in orgnic-rich muds of the Pamlico River estuarine system: Their concentration, distribution, and effects upon benthic environments and water quality : final report, the Pamlico River. Greenville, N.C: East Carolina University, 1989.

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Mohapatra, B. C. Heavy metal toxicity in the estuarine, coastal, and marine ecosystems of India. Kochi, Kerala State: Central Marine Fisheries Research Institute, 2000.

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Kracht, Frank. Einflussnahme frühdiagenetischer Prozesse auf die Schwermetallanreicherung in Sedimenten aus dem Wattgebiet der Wesermündung und aus dem Schlickgebiet der Deutschen Bucht südöstlich von Helgoland. Aachen: Shaker, 1992.

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Say, P. J. Enteromorpha as a monitor of heavy metals in estuarine and coastal intertidal waters: A method for the sampling, treatment and analysis of the seaweed Enteramorpha to monitor heavy metals in estuaries and coastal waters. Consett: Northern Environmental Consultants, 1986.

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Heavy metals in organic-rich muds of the Albemarle Sound estuarine system. [Raleigh, N.C.?]: Albemarle-Pamlico Estuarine Study, 1993.

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A Guide to the assessment of heavy-metal contamination in estuaries using biological indicators. Plymouth, Devon, England: Marine Biological Association of the U.K., 1985.

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Mapping the distribution of metal contamination in United Kingdom estuaries: Final Report on DoE contrct PECD 7/7/280. Plymouth, U.K: Plymouth Marine Laboratory, 1992.

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Capítulos de libros sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Schirmer, Michael. "Monitoring the Bioavailability of Heavy Metals in Relation to the Sediment Pollution in the Weser Estuary (FRG)". En Estuarine Water Quality Management, 377–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75413-5_55.

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Schirmer, Michael. "Monitoring the bioavailability of heavy metals in relation to the sediment pollution in the Weser estuary (FRG)". En Estuarine Water Quality Management Monitoring, Modelling and Research, 377–83. Washington, D. C.: American Geophysical Union, 1990. http://dx.doi.org/10.1029/ce036p0377.

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Kanchana, C. M., N. K. Chandrasekara, K. D. N. Weerasinghe, Sumith Pathirana y Ranjana U. K. Piyadasa. "Heavy Metal, Oil and Grease Pollution of Water and Sediments in Estuarine Lagoons in Sri Lanka: A Case Study in Negombo Estuarine Lagoon". En Multi-Hazard Early Warning and Disaster Risks, 429–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73003-1_29.

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Koukina, Sofia E. y Nikolay V. Lobus. "Heavy Metals in Estuarine Sediments: Chemical Bioavailability and Toxicity Assessment". En Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition), 547–51. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51210-1_86.

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Kennish, Michael J. "Heavy Metals". En Practical Handbook of Estuarine and Marine Pollution, 253–327. CRC Press, 2017. http://dx.doi.org/10.1201/9780203742488-6.

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Luoma, Samuel N. "Processes Affecting Metal Concentrations in Estuarine and Coastal Marine Sediments". En Heavy Metals in the Marine Environment, 51–66. CRC Press, 2018. http://dx.doi.org/10.1201/9781351073158-4.

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Actas de conferencias sobre el tema "Heavy metals Estuarine pollution Estuarine sediments"

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Wang, Lianfeng, Xinyi Li, Yanjiao Qiao, Qiaoling Ren, Hongtu Xie y Xudong Zhang. "Assessment of Heavy Metal Pollution in Estuarine Intertidal Sediments and Soils: A Case Study in Dalian". En 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162416.

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