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61.
Geovana D. Savi William A. Cardoso Bianca G. Furtado Tiago Bortolotto Elton T. Zanoni Rahisa Scussel 《Journal of environmental science and health. Part. B》2018,53(3):184-190
Zeolites are often used as adsorbents materials and their loaded cations can be exchanged with metal ions in order to add antimicrobial properties. The aim of this study was to use the 4A zeolite and its derived ion-exchanged forms with Zn2+, Li+, Cu2+ and Co2+ in order to evaluate their antifungal properties against Fusarium graminearum, including their capacity in terms of metal ions release, conidia germination and the deoxynivalenol (DON) adsorption. The zeolites ion-exchanged with Li+, Cu2+, and Co2+ showed an excellent antifungal activity against F. graminearum, using an agar diffusion method, with a zone of inhibition observed around the samples of 45.3 ± 0.6 mm, 25.7 ± 1.5 mm, and 24.7 ± 0.6 mm, respectively. Similar results using agar dilution method were found showing significant growth inhibition of F. graminearum for ion-exchanged zeolites with Zn2+, Li+, Cu2+, and Co2+. The fungi growth inhibition decreased as zeolite-Cu2+>zeolite-Li+>zeolite-Co2+>zeolite-Zn2+. In addition, the conidia germination was strongly affected by ion-exchanged zeolites. With regard to adsorption capacity, results indicate that only zeolite-Li+ were capable of DON adsorption significantly (P < 0.001) with 37% at 2 mg mL?1 concentration. The antifungal effects of the ion-exchanged zeolites can be ascribed to the interactions of the metal ions released from the zeolite structure, especially for zeolite-Li+, which showed to be a promising agent against F. graminearum and its toxin. 相似文献
62.
Scott C. Burgess Kate Osborne Bianca Sfiligoj Hugh Sweatman 《Environmental monitoring and assessment》2010,168(1-4):345-351
Seasonal variations in the concentrations of groundwater with respect to arsenic, lead, cadmium and aluminium has been studied in Dhemaji district of Assam, India. The water samples were collected from 20 different sites in both dry and wet seasons. The metals were analysed by using atomic absorption spectrometer, Perkin Elmer AAnalyst 200 model. The concentrations of aluminium, lead and cadmium in groundwater were found to be significantly elevated. High concentrations of all the metals were recorded in the dry season than in the wet season. Univariate statistics along with skewness, kurtosis and confidence limit have been calculated for both the seasons to test the distribution normality for each metal. Statistical analyses of the data reveal non-uniform distribution of the metals in the area. The metal contamination of groundwater in the district follows the trend Al > Pb > Cd > As in both the seasons. 相似文献
63.
Georgiana D. Vasile Luminiţa Vlădescu 《Environmental monitoring and assessment》2010,167(1-4):349-357
In this paper, the cadmium distribution in Certej River sediments in an area seriously affected by intense mining activities has been studied. The main objective of this study was the evaluation of partition of this metal into different operational defined fractions by sequential extractions. Community Bureau of Reference (BCR) sequential extraction was used to isolate different fractions. The sediment quality was assessed both upstream and downstream the pollution input points, along the Certej River, in order to reveal a possible accumulation of cadmium in sediments and the seasonal changes in cadmium concentrations in BCR sediment phases. Our results reveal that most of the cadmium content is divided between both the soluble and iron and manganese hydrated oxide fractions. Based on total cadmium concentrations in sediments, the enrichment factors were estimated using aluminum as normalizing element and the regression curve Cd/Al corresponding to the geochemical background of the studied area. 相似文献
64.
The influence of some climatic oscillations and sunspot number on river flows in Romania, Ukraine, and Moldova is verified by using standard wavelet analyses. The selected climate oscillations are Arctic Oscillation (AO), Antarctic Oscillation (AAO), East Atlantic Oscillation (EAO), East Atlantic/West Russia Oscillation (EAWRO), NINO3.4, North Atlantic Oscillation (NAO), Pacific/North America Oscillation (PNAO), Pacific Decadal Oscillation (PDO), Polar/Eurasia Oscillation (PEO), Scandinavian Oscillation (ScandO), Southern Oscillation (SO), and West Pacific Oscillation (WPO). Forty-five hydrological stations from an area of 45,000 km2 were used in order to discover the spatial evolution of the periodicities found in rivers. The wavelet analysis is novel for the rivers in the study area. There is an important difference between the periodicities found in mountain and plateau areas and those found in the plain area. There is a general downstream increase in the confidence level of the identified periods, even if the atmospheric precipitation has more relevant periodicities in the mountain area. The periodicities can be grouped into two compact groups: 1–16.5 and 27.8–55.6 years. The correlation matrix of the global wavelet spectrum (GWS) values indicates that NAO, EAWRO, PDO, and the sunspot number are the main factors that generate the periodicities in rivers. It is the first time when the influence of PDO on local rivers is proven. All river periodicities smaller than 16 years have a confidence level of 0.95 or above, as proven by the GWS analysis of the daily discharge data, and are caused by multiple external factors. 相似文献
65.
Eugen Mitrică Bianca Mitrică Andrei Stănculescu 《Environmental and Ecological Statistics》2014,21(1):83-93
The paper is focused on the cost of travel method and specific issues involved by the use of this method for monetization of benefits provided by nature preservation investment projects. Usually, nature preservation investment projects are non revenue generator projects and consequently the monetization of benefits provided is essential in the process of analysis and valuation of these projects, because benefits are the only positive effects able to counterbalance the investment costs. Therefore, the main interest and particularity of the cost-benefit analysis of nature preservation investment projects consists in identification and monetization of the benefits. In the following paper, the method of zonal travel cost is used for indicative valuation of the direct benefits of an investment project for nature preservation, in Harghita County of Romania, as an opportunity and pre-feasibility study completed before making the initial investment decision. 相似文献
66.
Bosio Morgana de Souza-Chaves Bianca Miguel Saggioro Enrico Mendes Bassin João Paulo Dezotti Márcia W. C. Quinta-Ferreira Maria Emília Quinta-Ferreira Rosa M. 《Environmental science and pollution research international》2021,28(19):23958-23974
Environmental Science and Pollution Research - Contaminants of emerging concern (CECs) are released daily into surface water, and their recalcitrant properties often require tertiary treatment.... 相似文献
67.
Bălă Gabriel-Petrică Râjnoveanu Ruxandra-Mioara Tudorache Emanuela Motișan Radu Oancea Cristian 《Environmental science and pollution research international》2021,28(16):19615-19628
Environmental Science and Pollution Research - There is increasing interest in understanding the role of air pollution as one of the greatest threats to human health worldwide. Nine of 10... 相似文献
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70.
Rita Gamberini Elisa Gebennini Bianca Rimini 《Waste management (New York, N.Y.)》2009,29(11):2846-2858
The content of hazardous components in Waste arising from Electrical and Electronic Equipment (WEEE) is a major concern that urges governments and industry to take measures to ensure proper treatment and disposal. Thus, the European Union issued directives to encourage reuse, recycling and other proper forms of recovery of such waste while companies and academics are still studying methods and technologies for optimizing recovery processes. This paper presents an analysis of the logistics process assuring the correct collection, handling, transportation and storing of WEEE. The experience comes from an Italian WEEE treatment plant (TRED Carpi S.r.l.) where a new kind of container has been introduced in order to improve the logistics system. An evaluation framework is described and used in order to compare different system configurations and assess the advantages emerging from adopting proper equipments for WEEE transport and handling. 相似文献