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Trace amounts of bismuth(III) and uranium(VI) can be simultaneously determined in a single scan by adsorptive cathodic stripping voltammetry in the presence of cupferron as a complexing agent. Optimal conditions were found to be: 0.1 mol?L?1 acetate buffer (pH 5.3), 5?×?10?5?mol?L?1 cupferron, accumulation potential of ?0.25 V, and accumulation time of 30 s. The linear range of Bi(III) and U(VI) was observed over the concentration range from 2?×?10?9 to 2?×?10?7?mol?L?1 and from 1?×?10?8 to 5?×?10?7?mol?L?1, respectively. The influence of the main components of real water samples such as foreign ions and organic substances (surface active substances, humic substances) was precisely investigated. The method was applied to the simultaneous measurements of bismuth and uranium in natural water samples. 相似文献
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Bogdan Skwarzec Malgorzata Prucnal 《Journal of environmental science and health. Part. B》2013,48(3):335-341
This study was undertaken to provide information on accumulation of polonium in tissues and organs of deer carvidae in order to assess the potential transport of this element via food-chain to game meat consumers. Livers, kidneys and muscles of large herbivorous animals belonging to three species: roe deer (Capreolus capreolus), red deer (Cervus elaphus) and fallow deer (Dama dama), collected in Northern Poland, were the subject of the present investigation. Activities of 210Po were determined by means of alpha spectrometry along with relevant radiochemical procedures. The concentration of 210Po in analyzed animals decreased in the order kidney > liver > muscle tissue. The average activity concentrations of 210Po ranged between 0.02 ± 0.01 Bq· kg? 1 w.w. in muscles and 7.15 ± 0.12 Bq· kg? 1 w.w. in kidneys. Levels of polonium were not influenced by sampling location, sex, age and species of animals. 相似文献
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Elzbieta Weryszko-Chmielewsk Idalia Kasprzyk Malgorzata Nowak Aneta Sulborsk Joanna Kaczmarek Agata Szymansk Weronika Haratym Miroslaw Gilski Malgorzata Jedryczka 《环境科学学报(英文版)》2018,30(3):271-281
The spores of Cladosporium Link. are often present in the air in high quantities and produce many allergenic proteins, which may lead to asthma. An aerobiological spore monitoring program can inform patients about the current spore concentration in air and help their physicians determine the spore dose that is harmful for a given individual. This makes it possible to develop optimized responses and propose personalized therapy for a particular sensitive patient. The aim of this study was to assess the extent of the human health hazard posed by the fungal genus Cladosporium. For the first time, we have determined the number of days on which air samples in Poland exceeded the concentrations linked to allergic responses of sensitive patients, according to thresholds established by three different groups(2800/3000/4000 spores per 1 m~3 of the air). The survey was conducted over three consecutive growing seasons(April–September, 2010–2012) in three cities located in different climate zones of Poland(Poznan, Lublin and Rzeszow). The average number of days exceeding 2800 spores per cubic meter(the lowest threshold) ranged from 61(2010) through 76(2011) to 93(2012), though there was significant variation between cities. In each year the highest concentration of spores in the air was detected in either Poznan or Lublin, both located on large plains with intensive agriculture. We have proposed that an effective, science-based software platform to support policy-making on air quality should incorporate biological air pollutant data,such as allergenic fungal spores and pollen grains. 相似文献
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Maurike de Groot-van der Mooren Gert de Graaf Michel E Weijerman Mariette J. V Hoffer Jeroen Knijnenburg Anne-Marie M. F van der Kevie-Kersemaekers Angelique J. A Kooper Els Voorhoeve Birgit Sikkema-Raddatz Laura J. C. M van Zutven Malgorzata Ilona Srebniak Karin Huijsdens-van Amsterdam John J. M Engelen Dominique Smeets Anton H van Kaam Martina C Cornel 《黑龙江环境通报》2021,41(10):1351-1359
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Olchawa E Bzowska M Stürzenbaum SR Morgan AJ Plytycz B 《Environmental pollution (Barking, Essex : 1987)》2006,142(2):373-381
Three-day dermal exposure of Dendrobaena veneta to metal ions differentially disrupts the immunocompetence/pathogen balance. Zn does not accumulate in the earthworm body, Cu accumulation is temperature-independent while Cd accumulation is stronger at 22 degrees C than at 10 degrees C. During in vitro incubation with metal ions at 22 degrees C, growth of coelom-derived bacteria is enhanced by Zn, but significantly or almost completely inhibited by Cu or Cd. In contrast, under in vivo conditions at 22 degrees C, bacterial load is decreased only after Cd exposure, but increased after Zn and Cu exposures. At 10 degrees C bacteria growth is almost completely inhibited in all groups except Cu-treated animals. Coelomocyte number is unaffected in animals exposed to Zn, but significantly decreased after exposure to Cd (at 22 degrees C) and Cu (at 22 degrees C and 10 degrees C) with concomitant changes of amoebocyte-to-eleocyte ratio in favour of amoebocytes. Metal exposure up-regulates expression of metallothioneins in coelomocytes, mainly amoebocytes. 相似文献
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Copper ore tailings were tested for the stability of titanium submitted to water leaching in three different reactor systems (agitated vessel, bioreactor and percolated fixed-bed column). For each of these systems, titanium extraction did not exceed 1% of the available metal. Biomass removed from ore residue adsorbed a small part of the titanium with sorption capacities below 20-30 mg g(-1), but most of this biomass was sequestered in the ore residue. Oxygen and carbon dioxide concentrations were monitored and changes in concentration correlated with bacteria development at the initial stage of the process and to fungal development in the latter stages. 相似文献
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Malgorzata Kwiecień 《Environmental monitoring and assessment》1997,46(3):191-207
A new, direct method was developed for quantifying inorganic particulate aerosols trapped by the forest canopy, and for determining the resulting input of elements to a forest ecosystem. The method is based on direct measurements of only six parameters. Using this method, it is possible to determine the load of aerosols trapped by the forest canopy and deposited to leaves, as well as the load of aerosols falling to the forest floor by impaction on plants. It is also possible to estimate the aerosol input of soluble and insoluble elements to an ecosystem. With this new method it has been found that the load of aerosols trapped by the canopy of a mixed forest located in the Rybnik Coal Basin averaged 189.0 kg x ha-1 x growing season-1, or 39.3% of the total inorganic particles reaching the ecosystem. The trapped aerosols provided 13.4 kg x ha-1 of soluble nitrogen and 0.91 kg x ha-1 of insoluble nitrogen over the growing season. At the same time, the input of soluble nitrogen from the atmosphere with rainfall to an open area averaged 13.9 kg x ha-1, and the input of insoluble nitrogen with inorganic dusts averaged 1.4 kg x ha-1. 相似文献