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821.
Mert Mehmet Bölük Gülden Çağlar Abdullah Emre 《Environmental science and pollution research international》2019,26(21):21495-21510
Environmental Science and Pollution Research - This study estimated unbalanced panel data analysis to investigate the relationship among CO2 emissions, GDP, renewable and non-renewable energy... 相似文献
822.
Quénéa Katell Andrianjara Iry Rankovic Aleksandar Gan Erika Aubry Emmanuel Lata Jean-Christophe Barot Sébastien Castrec-Rouelle Maryse 《Environmental science and pollution research international》2019,26(10):9785-9795
Environmental Science and Pollution Research - With the actual increasing interest for urban soils, the evaluation of soil contamination by trace elements and the dynamics of this contamination... 相似文献
823.
Lucía Emilia Iglesias Carlos Saumell Federica Sagüés Juan Manuel Sallovitz Adrián Luis Lifschitz 《Journal of environmental science and health. Part. B》2018,53(1):42-48
The aim of this work was to evaluate the fate of ivermectin (IVM) at two concentrations in cattle feces and its movement to the nearby soil and plants. Feces were spiked with IVM at two levels: 3000 ng g?1 (high group, HG) and 300 ng g?1 (low group, LG). Artificial dung pats were prepared and deposited in an experimental field area. Feces and underlying soil were sampled up to 60 days post-deposition (dpd). As an additional analysis, grasses growing around the pats were sampled at 30 and 60 dpd. Ivermectin concentrations in all matrices were determined by HPLC. Mean IVM fecal concentrations were in the range between 3901.9 ng g?1 and 2419.2 ng g?1 (high group) and 375.3 ng g?1 and 177.49 ng g?1 (low group). Mean times for 50% and 90% dissipation were 88.23 and 293.03 days (HG) and 39.1 and 129.9 days (LG). Soil concentrations ranged from 26.1 ng g?1 to 71.1 ng g?1 (HG) and 3.4 to 5.9 ng g?1 (LG); in plants, concentrations were between 71.4 and 380.8 ng g?1 and 5.40 and 51.8 ng g?1 in HG and LG, respectively. These results confirm that IVM moves from feces to the underlying soil as well as to nearby plants. The potential risk of detrimental effects on soil organisms and the impact on herbivorous animals should be further evaluated. 相似文献
824.
Gábor Veréb Ildikó Kovács Mihály Zakar Szabolcs Kertész Cecilia Hodúr Zsuzsanna László 《Environmental science and pollution research international》2018,25(35):34976-34984
In the present study, oil in water emulsions (coil?=?100 ppm; doil droplets?<?2 μm) was purified with ozonation followed by microfiltration using polyethersulfone (PES) membrane (dpore?=?0.2 μm). The effects of pre-ozonation on membrane microfiltration were investigated in detail both in case of ultrapure and model groundwater matrices, applying different durations (0, 5, 10, and 20 min) of pre-ozonation. Simultaneously, the effects of added inorganic water components on the combined method were investigated. Size distribution of oil droplets, zeta potentials, fluxes, and purification efficiencies were measured and fouling mechanisms were described in all cases. It was found that the matrix significantly affected the size distribution and adherence ability of oil droplets onto the membrane surface, therefore fouling mechanisms also were strongly dependent on the matrix. In case of low salt concentration, the total resistance was caused mainly by reversible resistance, which could be significantly reduced (eliminated) by pre-ozonation. In case of model groundwater matrix, nearly twice higher total resistance was measured, and irreversible resistance was dominant, because of the higher adhesion ability of the oil droplets onto the membrane surface. In this case, pre-ozonation resulted in much lower irreversible, but higher reversible resistance. Increased duration of pre-ozonation raised the total resistance and reduced the elimination efficiency (due to fragmented oil droplets and water soluble oxidation by-products) in both cases, therefore short pre-ozonation can be recommended both from economic and performance aspects. 相似文献
825.
Marianna Siegmund-Schultze Maria do Carmo Sobral Márcia M. G. Alcoforado de Moraes Jarcilene S. Almeida-Cortez J. Roberto G. Azevedo Ana Lúcia Candeias Arne Cierjacks Edvânia T. A. Gomes Günter Gunkel Volkmar Hartje Fred F. Hattermann Martin Kaupenjohann Hagen Koch Johann Köppel 《Regional Environmental Change》2018,18(7):1883-1888
826.
Jorge Luiz Araújo da Silva Maria do Socorro B. Araújo Everardo Valadares de Sá Barretto Sampaio Jorge Vitor Ludke Dário Costa Primo 《Regional Environmental Change》2018,18(7):1999-2004
Sludge generated in intensively managed tilapia fingerling breeding ponds near the Itaparica Dam in the semi-arid Brazilian northeastern region was tested as a soil conditioner to produce lettuce in an effort to mitigate the present environmental impact of the deposition of this sludge, thereby giving it a productive destiny. A greenhouse experiment was performed by mixing the sludge with a Haplic Planosol topsoil, a characteristic soil of the region, so that the sludge corresponded to 0, 25, 50, 75, and 100% of the mixture (substrate). The experiment was set up as a randomized block design with five blocks, each with three pots (5-kg substrate per pot) of the five sludge proportion treatments. One lettuce plant was transplanted into each pot, maintained under greenhouse conditions, and harvested 35 days after transplanting. Sludge, soil, and the substrates were evaluated for nutrient concentration and physical characteristics. Green and dry weights, stem diameter, and nitrogen, phosphorus, and potassium concentrations in the aboveground parts of the lettuce plants were determined. Sludge incorporation into the substrate improved its chemical and physical characteristics. The lettuce plants grew best in the substrate with 75% sludge, increasing its biomass production by 50% and more than doubling its nitrogen uptake. 相似文献
827.
García-Leoz Vanessa Villegas Juan Camilo Suescún Diego Flórez Claudia P. Merino-Martín Luis Betancur Teresita León Juan Diego 《Regional Environmental Change》2018,18(4):1117-1129
Regional Environmental Change - Vegetation actively affects different components of the water budget in multiple spatial and temporal scales. Changes in vegetation cover and structure—such as... 相似文献
828.
Modelling the Ecological Vulnerability to Forest Fires in Mediterranean Ecosystems Using Geographic Information Technologies 总被引:1,自引:0,他引:1
Beatriz Duguy José Antonio Alloza M. Jaime Baeza Juan De la Riva Maite Echeverría Paloma Ibarra Juan Llovet Fernando Pérez Cabello Pere Rovira Ramon V. Vallejo 《Environmental management》2012,50(6):1012-1026
Forest fires represent a major driver of change at the ecosystem and landscape levels in the Mediterranean region. Environmental features and vegetation are key factors to estimate the ecological vulnerability to fire; defined as the degree to which an ecosystem is susceptible to, and unable to cope with, adverse effects of fire (provided a fire occurs). Given the predicted climatic changes for the region, it is urgent to validate spatially explicit tools for assessing this vulnerability in order to support the design of new fire prevention and restoration strategies. This work presents an innovative GIS-based modelling approach to evaluate the ecological vulnerability to fire of an ecosystem, considering its main components (soil and vegetation) and different time scales. The evaluation was structured in three stages: short-term (focussed on soil degradation risk), medium-term (focussed on changes in vegetation), and coupling of the short- and medium-term vulnerabilities. The model was implemented in two regions: Aragón (inland North-eastern Spain) and Valencia (eastern Spain). Maps of the ecological vulnerability to fire were produced at a regional scale. We partially validated the model in a study site combining two complementary approaches that focused on testing the adequacy of model’s predictions in three ecosystems, all very common in fire-prone landscapes of eastern Spain: two shrublands and a pine forest. Both approaches were based on the comparison of model’s predictions with values of NDVI (Normalized Difference Vegetation Index), which is considered a good proxy for green biomass. Both methods showed that the model’s performance is satisfactory when applied to the three selected vegetation types. 相似文献
829.
Maria Teresa García Gema Duque Ignacio Gracia Antonio de Lucas Juan F. Rodríguez 《Journal of Material Cycles and Waste Management》2009,11(1):2-5
The amount of extruded polystyrene (XPS) waste has increased in recent years due to the increase of its use in the thermal
insulation of buildings, transport vehicles, and refrigerators, among others. Dissolution with suitable solvents to achieve
a volume reduction of more than 100 times without degradation of polymer chains is one of the cheapest and most efficient
methods of recycling XPS. Several environmentally friendly solvents have been tested as dissolution agents for XPS volume
reduction; the action of these solvents does not produce any degradation of polymer chains. The solubility of the polymer
in such solvents at different temperatures was investigated. The solvent can be easily recycled by distillation, obtaining
a high-quality recycled polymer.
Chemical Feedstock Recycling & Other Innovative Recycling Techniques 6 相似文献
830.
A. Araújo M. Oliveira R. Oliveira G. Botelho A. V. Machado 《Environmental science and pollution research international》2014,21(16):9477-9486
Poly(lactic acid) nanocomposites containing Cloisite 15A, Cloisite 30B, and Dellite 43B were prepared by melt-mixing in a batch mixer and were exposed to UV radiation, temperature, and microorganism in solution and in a compost. Exposed samples, collected along the time, were characterized by several techniques. While the addition of organoclays had a positive effect on thermal stability, the degradation rate of nanocomposites increased when exposed to UV radiation and microorganism. Moreover, the degradation rate depends on the organoclay type. Even though the degradation rate is higher for nanocomposites, Fourier transform infrared spectrometry and gel permeation chromatography results demonstrated that the degradation mechanism is the same. 相似文献