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71.
Jérémie Charles Grégorio Crini François Degiorgi Bertrand Sancey Nadia Morin-Crini Pierre-Marie Badot 《Environmental science and pollution research international》2014,21(2):1099-1111
To document the toxicity of copper and nickel in binary mixtures, freshwater amphipods Gammarus pulex were exposed to the metals given independently or as mixtures. Toxicity to Cu alone was relatively high: 96-h LC10 and LC50 were found at 91 and 196 μg L?1, respectively. Toxicity to Ni alone was very low, with 96-h LC10 and LC50 of 44,900 and 79,200 μg L?1, respectively. Mixture toxicities were calculated from single toxicity data using conventional models. Modeled toxicity was then compared with the measured toxicity of the binary mixture. Two kinds of mixtures were tested. Type I mixtures were designed as combinations of Cu and Ni given at the same effect concentrations, when taken independently, to identify possible interactions between copper and nickel. In type II mixtures, Cu concentrations varied from 0 to 600 μg L?1 while the nickel concentration was kept constant at 500 μg L?1 to mimic conditions of industrial wastewater discharges. Ni and Cu showed synergic effects in type I mixtures while type II mixtures revealed antagonistic effects. Low doses of Ni reduced Cu toxicity towards G. pulex. These results show that even for simple binary mixtures of contaminants with known chemistry and toxicity, unexpected interactions between the contaminants may occur. This reduces the reliability of conventional additivity models. 相似文献
72.
Penna Nadia Coscarella Francesco D’Ippolito Antonino Gaudio Roberto 《Environmental Fluid Mechanics》2022,22(2-3):619-644
Environmental Fluid Mechanics - Flume experiments are conducted to investigate the effect of streambed instability in channels with randomly-distributed vegetation, varying vegetation density and... 相似文献
73.
González-Moscoso Magín Juárez-Maldonado Antonio Cadenas-Pliego Gregorio Meza-Figueroa Diana SenGupta Bhaskar Martínez-Villegas Nadia 《Environmental science and pollution research international》2022,29(23):34147-34163
Environmental Science and Pollution Research - In this study, we simulate the irrigation of tomato plants with arsenic (As)-contaminated water (from 0 to 3.2 mg L?1) and investigate... 相似文献
74.
Chiara Chiapponi Enrico Pavoni Barbara Bertasi Laura Baioni Erika Scaltriti Edoardo Chiesa Luca Cianti Marina Nadia Losio Stefano Pongolini 《Food and environmental virology》2014,6(3):202-206
Hepatitis A virus (HAV) was detected in two samples of mixed frozen berries linked to Italian hepatitis A outbreak in April and September 2013. Both viruses were fully sequenced by next-generation sequencing and the genomes clustered with HAV complete genomes of sub-genotype IA with nucleotide identities of 95–97 %. 相似文献
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This research proposes an integrated framework to investigate human-dominated systems and provide a basic approach to urban
and regional studies in which the multiple interactions between economic and ecological processes are considered as a whole.
Humans generate patterns of land use, infrastructures and other settings and redistribute ecosystem functions as flows of
energy and matter for self-maintenance. To understand these emerging interactions between humans and ecological processes,
human activities (e.g. transformation processes, land conversions, use of resources) and biophysical agents such as geomorphology,
climate and natural cycles need to be considered. Emergy Analysis (spelled with an “m”) is then used as an environmental accounting
method to evaluate different categories of resource use with reference to their environmental cost. A case study of the Province
of Cagliari (in the island of Sardinia, Italy) is reported and the procedure for allocating emergy flows, assigning them to
districts and managing point data is discussed. Outcomes plotted on a map showed non-homogeneous spatial distribution of emergy
flows throughout the region, suggesting the way ecosystem functions are affected and restructured by the human economy. 相似文献
78.
Ludwig De Temmerman Nadia Waegeneers Edward Roekens 《Environmental pollution (Barking, Essex : 1987)》2009,157(4):1337-1341
A biomonitoring network with leafy vegetables was established near a chlor-alkali plant in order to compare the accumulation of mercury to the atmospheric total gaseous mercury (TGM) concentration. Based on data obtained in the reference area the ‘normal’ mercury concentration in vegetables is between 0.6 and 5.4 μg kg−1 FW. The effect detection limits (EDLs) are between 1.2 and 11.0 μg kg−1 FW and the biological detection limits (BDLs), the lowest [TGM] that can be detected significantly, are between 3 and 4 ng m−3. The accumulation rate is lowest for lettuce and high for curly kale that proved to be an excellent accumulator and as such it is very useful for biomonitoring purposes. A comparison made in the 1980s between biomonitoring results with grass and the mercury concentration in leafy vegetables from private gardens nearby proved to be valid when applied to the current biomonitoring results with vegetables. 相似文献
79.
Metal pollution records in core sediments of some Red Sea coastal areas, Kingdom of Saudi Arabia 总被引:1,自引:0,他引:1
Badr NB El-Fiky AA Mostafa AR Al-Mur BA 《Environmental monitoring and assessment》2009,155(1-4):509-526
In the last three decades, the industrial and human activities in the coastal area of Saudi Arabia have increased dramatically and resulted in the continuous invasion of different types of pollutants including heavy metals. Seven sediment cores were collected from three major industrialized areas; Jeddah, Rabigh and Yanbu, along the coast of Saudi Arabia to determine the spatial and temporal distribution of metals and to assess the magnitude of pollution and their potential biological effects. Sediments were analyzed for texture, calcium carbonate contents, organic matter and metals (Al, Fe, Mn, Cd, Cr, Cu, Ni, Pb and Zn). Some metals like, Cr, Mn, Ni and Zn, were enriched in the upper 15 cm of core samples (recent deposition of sediments). Cadmium concentrations showed high fluctuations with depth and reverse pattern to that for Al, Fe and Mn which indicated land based sources of this element to the studied areas. Elevated concentrations of lead were recorded in the bottom layers of cores in Jeddah that indicated the most dramatic increase in usage of gasoline in early 1970s. The calculated contamination factors (CF's) were found in the following sequences: Cd > Pb > Ni > Cu > Zn > Cr > Mn for all studied areas. Results of Pollution Load Index (PLI) revealed that Jeddah is the most polluted area, followed by Rabigh while Yanbu is the least contaminated area. Except for Ni, the concentrations of most metals in the majority of sediment samples were believed to be safe for living organisms. As no data were available on the concentration of metals in core sediments in the coastal area of Saudi Arabia, the results of this study would serve as a baseline against which future anthropogenic effects can be assessed. 相似文献
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