11 research outputs found
Transfer of Chernobyl radioisotopes to mushrooms
No full textMeasurements of radionuclide activities, following the Chernobyl accident, on some common mushrooms taken in NE Italy, during July-November 1986, are reported together with the corresponding soil analyses. Some species tend to concentrate Cs and Ag isotopes; other species present low concentration levels according to their different characteristics and metabolic behaviours. -English summar
Assessment of Chernobyl radioactive fallout over Padua
No full textIncreased atmosphere radioactivity from the Chernobyl nuclear reactor accident was first detected on air filters taken in Padua on 30 April 1986. Air activities reached the maximum values of 28.6, 19.2, 3.3, 1.7 and 7.5 Bq m-3 for 131I, 132Te(132I), 137Cs, 134Cs and 103Ru respectively, on 1 May; about ten days later the activities declined to less than 1% of peak values. The distribution of radionuclides in Padua was evaluated on the basis of radioactivity measurements detected on natural collectors; it was estimated an average committed dose equivalent to thyroid of 0.37 mSv for adult people in Padua due to 131I inhalation. -English summar
Sedimentary records of heavy metals in the industrial harbour of Portovesme, Sardinia (Italy)
No full textDetermination of Americium-241 in sediments by gamma spectroscopy
No full textA radiochemical method is given for the determination of Am-241 from the
global fallout in sediments. The concept of a concentration step to separate
Am-241 from the bulk of the sample (1.2 kg wet) by coprecipitation followed
by low energy gamma spectroscopy was investigated. A series of experiments
with tracer added was performed to measure the recovery of americium by
coprecipitation. Also, a number of real samples without tracer were examined
and the conditions for the optimum separation are given. The applied gamma
method and the conventional, accurate, but tedious, aplha technique via
243Am, which is usually applied for the determination of Am-241, agreed
mostly within 10 %.</jats:p
Analysis of major, minor and trace elements in surface sediments by X-ray fluorescence spectrometry for assessment of possible contamination of Boka Kotorska Bay, Montenegro
No full textBoka Kotorska Bay is on the UNESCO's World Heritage List. There are no published papers re-lated to the surface sediment pollution of the Bay. For the first time, elements were measured in surface sediments at nine locations in the Bay by the energy dispersive X-ray fluorescence spectrometry (ED-XRF) technique. Si, Fe, Ca, K, Ti, Mn, P, Ba, Cr, Sr, Zn, Rb, Ni, Cu, Pb, As, Sn, Sb, Hg and Cd were quantified in the surface sediments. Sediments were classified as non-polluted or polluted by counting the enrichment factor (EF), metal loading index (MLI) and geo-accumulation index (Igeo) based on the ele-mental background level of the analyzed elements in the literature, or by the Sediment Quality Guidelines (SQGs) of USEPA (United States Environmental Protection Agency). Based on USEPA's SQGs, the sur-face sediment in the entire Bay can be classified as heavily polluted by As and Cr, and non-polluted by Cd and Hg, and, related to the sites, the surface sediment at the Tivat-Arsenal site was heavily polluted and at the Orahovac site was not polluted at all. The PLI (pollution load index) values for the locations of Tivat-Arsenal and Orahovac are in agreement with the conclusion based on USEPA's SQGs. The results in this paper will establish an initial view of sediment pollution and the state of the Bay's environment.Заливот Бока Которска е на листата на светскотонаследство на УНЕСКО. Не постојат објавени трудови поврзанисо површинското загадување на заливот. За прв пат на девет локации во заливот елементите во површинските седименти се измерени со техниката на енергетскадисперзиона рендгенска флуоресцентна спектрометрија. Во површинските наслаги беа измерени Si, Fe, Ca, K, Ti, Mn, P, Ba, Cr, Sr, Zn, Rb, Ni, Cu, Pb, As, Sn, Sb, Hgи Cd. Наслагите беа класифицирани како незагадени или загадени со пресметување на факторот на збогатување на наслагите (седиментите) со метали(EF), индексот на таложење на метали(MLI) и гео-акумулационениндекс (Igeo) базиранна литературните податоци заелементарно ниво на анали-зираните елементи, односноврз основа на Упатството за квалитетот на седиментот (SQG) на USEPA. Врз основа на SQGsна USEPA, површинскиот седимент во заливот како целинаможе да се класифицира како силно загаден со Asи Crи како незагаден со Cdи Hg, аво однос на одделни локации површинскиот седиментво Тиват-Арсенал беше многу загаден, а воОраховац воопшто не беше загаден. Вредностите PLIза локациите Тиват-Арсенал и Ораховацсе во согласност со заклучокот базиран на SQGsна USEPA. Резултатите одовој труд ќе ја создадатпочетната претстава за загадувањето на седиментите и за состојбата на животната средина на заливот
Analysis of major, minor and trace elements in surface sediments by x-ray fluorescence spectrometry for assessment of possible contamination of Boka Kotorska bay, Montenegro
No full textBoka Kotorska Bay is on the UNESCO's World Heritage List. There are no published papers related to the surface sediment pollution of the Bay. For the first time, elements were measured in surface sediments at nine locations in the Bay by the energy dispersive X-ray fluorescence spectrometry (EDXRF) technique. Si, Fe, Ca, K, Ti, Mn, P, Ba, Cr, Sr, Zn, Rb, Ni, Cu, Pb, As, Sn, Sb, Hg and Cd were quantified in the surface sediments. Sediments were classified as non-polluted or polluted by counting the enrichment factor (EF), metal loading index (MLI) and geo-accumulation index (I-geo) based on the elemental background level of the analyzed elements in the literature, or by the Sediment Quality Guidelines (SQGs) of USEPA (United States Environmental Protection Agency). Based on USEPA's SQGs, the surface sediment in the entire Bay can be classified as heavily polluted by As and Cr, and non-polluted by Cd and Hg, and, related to the sites, the surface sediment at the Tivat-Arsenal site was heavily polluted and at the Orahovac site was not polluted at all. The PLI (pollution load index) values for the locations of Tivat-Arsenal and Orahovac are in agreement with the conclusion based on USEPA's SQGs. The results in this paper will establish an initial view of sediment pollution and the state of the Bay's environment
The vertical distribution of the Cs-137 derived from Chernobyl fall-out in the uppermostSphagnum layer of two peatlands in the southern Alps (Italy)
No full textItalian antarctic research program: environmental radioactivity survey around the Italian base (1987-1991) Terranova Bay - Ross Sea Region
No full textMussels as a bio-indicator of the environmental quality of the coastal water of the Boka Kotorska Bay (Montenegro)
No full textThe Mediterranean blue mussel Mytilus galloprovincialis was used as a pollution level indicator in the Boka Kotorska Bay of the southeastern Adriatic on the Montenegrin coast. The ever-increasing urbanization and industrialization, combined with a poor sewage system, an increase in both marine and inland traffic, as well as insufficient water circulation in the Bay itself have resulted in some level of pollution. Since heavy metals are extremely toxic and do not easily undergo biodecomposition, the results of this study supply valuable information concerning the metal pollution of the marine environment in Boka Kotorska Bay. The concentrations of the investigated metals and non-metals accumulated in the mussels were determined during the fall of 2007 using Atomic Absorption Spectroscopy (AAS) for Cr, Mn, Co, Ni, Cu, Cd, Hg, Pb, Sn and V, and Energy Dispersive X-ray Fluorescence (ED–XRF) to determine the concentrations of Fe, Zn, Si, P, S, Cl, K and Ca. ED–XRF was also used to determine the levels of non-metals and elements present in high concentrations. Comparing the data from this study in relation to data from other regions for Mytilus galloprovincialis, the mussel sampled from the Boka Kotorska Bay showed a moderate level of pollution
Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea
No full textThe present study investigated the essential and non-essential elements in cultivated and wild mussels and assessed the health risk arising from their consumption as an impact of rapid growth and intensive production of Mytilus galloprovincialis in the mussel farms of the Boka Kotorska Bay. The concentrations of macro, micro, nonessential and even the small amounts of potentially toxic elements in the cultivated and wild mussels were influenced by industry, tourism and the geohydrology of the Bay. In the case of cultivated mussels, the limiting factor, i.e., the element the elevated concentration of which restricts mussels consumption, was Zr, while in the case of wild mussels the limiting factors were Cr and As. The sites with cultivated mussels stand out as sites with the highest calculated element pollution index, the total hazard index and with higher estimated risk to the health of consumers. (C) 2016 Elsevier Inc. All rights reserved
