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101.
Białk-Bielińska A Maszkowska J Mrozik W Bielawska A Kołodziejska M Palavinskas R Stepnowski P Kumirska J 《Chemosphere》2012,86(10):1059-1065
Sulfonamides (SAs) are one of the oldest groups of veterinary chemotherapeutic agents. As these compounds are not completely metabolized in animals, a high proportion of the native form is excreted in feces and urine. They are therefore released either directly to the environment in aquacultures and by grazing animals, or indirectly during the application of manure or slurry. Once released into the environment, SAs become distributed among various environmental compartments and may be transported to surface or ground waters. The physicochemical properties of SAs, dosage and nature of the matrix are the factors mainly responsible for their distribution in the natural environment. Although these rather polar compounds have been in use for over half a century, knowledge of their fate and behavior in soil ecosystems is still limited. Therefore, in this work we have determined the sorption potential of sulfadimethoxine and sulfaguanidine on various natural soils. The influence on sorption of external factors, such as ionic strength and pH, were also determined. The sorption coefficients (Kd) obtained for the sulfonamides investigated were quite low (from 0.20 to 381.17 mL g−1 for sulfadimethoxine and from 0.39 to 35.09 mL g−1 for sulfaguanidine), which indicated that these substances are highly mobile and have the potential to run off into surface waters and/or infiltrate ground water. Moreover, the sorption of these pharmaceuticals was found to be influenced by OC, soil solution pH and ionic strength, with higher Kd values for soils of higher OC and lower Kd values with increasing pH and ionic strength. 相似文献
102.
Topka Pavel Jirátová Květuše Dvořáková Michaela Balabánová Jana Koštejn Martin Kovanda František 《Environmental science and pollution research international》2022,29(4):5172-5183
Environmental Science and Pollution Research - The aim of this work was to develop a novel method for the preparation of structured Co–Mn mixed oxide catalysts: deposition on stainless steel... 相似文献
103.
Ivan Kuneš Martin Baláš Tereza Koňasová Ondřej Špulák Vratislav Balcar Kateřina Bednářová Millerová Dušan Kacálek Michal Jakl Daniel Zahradník Jan Vítámvás Jaroslava Št́astná Jana Jaklová Dytrtová 《Environmental management》2014,54(6):1421-1433
The article summarizes outcomes of a biomass study conducted in a young speckled alder plantation on a cold mountain site. At this location, the previously existing old forest was clear felled because of damage from air pollution, and present-day surface humus is in need of restoration. The intention of this study was to quantify the biomass and nutrients accumulated by alders and their components and assess whether the initial fertilization resulted in increased biomass production and nutrient accumulation in the biomass. Besides the control, two fertilized treatments were installed. In the surface treatment (SUT), the amendment was applied as a base dressing in small circles around trees. In the planting-hole treatment (PHT), the amendment was incorporated into soil inside the planting holes. Five growth seasons after planting and fertilization, six alders from each treatment were harvested including roots. Their biomass was quantified and analyzed for macroelements. The greatest pool of dry mass (DM) was branches in the control and stem wood in the fertilized treatments. The greatest pools of macroelements were leaves and branches. The most pronounced effects of fertilization were recorded in the DM and consequently in the absolute quantities of nutrients. The DM of an average tree in the control, SUT, and PHT was 85, 226, and 231 g, respectively. The absolute contents of nutrients per tree in the fertilized treatments showed the following increases, as compared with the control: (N) 2.5–2.6 times; (P) 1.6–2.4 times; (K) 1.8–2.1 times; and (Mg) 1.8–2.0 times, respectively. Speckled alder responded positively to fertilization. 相似文献
104.
Dolar D Ignjatić Zokić T Košutić K Ašperger D Mutavdžić Pavlović D 《Environmental science and pollution research international》2012,19(4):1033-1042
Background
Emerging contaminants (ECs) are commonly derived from industrial wastewater, which is often a consequence of an inadequate treatment of the latter. Improperly pretreated pharmaceutical wastewater could cause difficulties in operations of wastewater treatment plants while incomplete elimination of ECs during the processing might result in their appearance in drinking water. 相似文献105.
Jeong Huy Ko Yeon-Ho Kwak Kyung-Seun Yoo Jong-Ki Jeon Sung Hoon Park Young-Kwon Park 《Journal of Material Cycles and Waste Management》2011,13(3):173-179
Experiments were performed in order to investigate the possibility for the development of catalysts for low-temperature selective
catalytic reduction (SCR) using municipal waste char and RDF byproduct. Physical and chemical activations, using water, and
HCl and KOH, were employed to increase the catalytic activities. The characteristics of the activated catalysts were investigated
using N2 adsorption–desorption and FT-IR. The catalysts activated chemically using basic treatment showed higher NO
x
removal efficiencies than those activated physically or chemically using acidic treatment. The de-NO
x
performance of the activated catalysts was dependent on the chemical properties, such as oxygen functional groups as well
as physical properties, such as specific surface area and pore volume. In order to investigate the effect of MnO
x
, which has been reported to be efficient for the removal of NO
x
in low-temperature SCR processes, the chemically activated catalyst was impregnated with manganese. The Mn-impregnated catalyst
had the highest NO
x
conversion at all of the temperatures tested in this study. 相似文献
106.
Fine-scale movement patterns in penaeid prawns are rarely observed in situ, but are essential in understanding habitat use,
foraging, and anti-predator behaviour. Acoustic telemetry was applied to examine the activity, space utilization, and habitat
use of the eastern king prawn Penaeus (Melicertus) plebejus, at small temporal and spatial scales. Tracking of sub-adult P. plebejus (n = 9) in Wallagoot Lake (36.789°S, 149.959°E; 23 April–12 May 2009) and calculation of a minimum activity index (MAI) revealed high variation in activity rates across diel periods and in different habitats. Elevated activity rates and movement
indicated foraging in unvegetated habitats during the night. Areas within the 95 and 50% space utilization contours averaged
2,654.1 ± 502.0 and 379.9 ± 103.9 m2, respectively, and there was a significant negative relationship between these areas and prawn activity rates in unvegetated
habitats. This study provides the first estimates of prawn activity rates and space utilization in the field. Application
of acoustic telemetry can increase knowledge of prawn movements and their interactions with other marine species in different
habitats. 相似文献
107.
Application of a new generation of complexing agents in removal of heavy metal ions from different wastes 总被引:1,自引:0,他引:1
Dorota Kołodyńska 《Environmental science and pollution research international》2013,20(9):5939-5949
Complexing agents are extensively applied in many fields of industry. They are used to provide effective controlling trace metal ions in cleaning industries, textile, pulp and paper production, water treatment, agriculture, food industries, etc. Recently, the low biodegradability of these ligands and their accumulation in the environment has become a cause for concern. Therefore, replacement of ethylenediaminetetraacetic acid and diethylenetriaminepentaacetic acid by more environmentally friendly chelating agents is highly desirable. So far, these acids and their salts have been applied as components of household chemistry, cosmetics, modern microelement fertilizers and agrochemicals. This paper reviews the sorption of heavy metal ions such as Cu(II), Zn(II), Cd(II) and Pb(II) in the presence of the above-mentioned complexing agents on commercially available anion exchangers of different matrix. The obtained sorption results were fitted using the Langmuir and Freundlich sorption isotherm models. The kinetic data were also analysed using the Lagergren, Ho and McKay sorption kinetic equations. The studies were carried out considering the effects of such important parameters as phase contact time, initial concentration, pH and temperature. 相似文献
108.
Mobility is a matter of great importance in daily life: However, it also causes costs and involves accident risks. To make mobility safer and reduce accident risks, a scientifically based road safety management is needed. Within such a safety management system, a concert of adequate and efficient strategies, tools and measures is developed and implemented. To ensure that the chosen means are efficient they should be derived from research evidence. Secondly, research is also needed to regularly monitor the impact of road safety management tools, serving as a “controlling instrument” for the appropriateness of safety management efforts. This article explains the main strategic aspects of safety management in Germany and illustrates it exemplarily on the basis of two recently implemented road safety measures. 相似文献
109.
This article presents a review of the current municipal solid waste (MSW) and domestic waste generation and recovery situation
in Hong Kong and identifies the factors affecting the waste generation rates. The results show that before 1997, MSW and domestic
waste generation rates were driven by population growth and growth in the gross domestic product, with the latter having the
larger effect. But recent waste generation data show poor correlation between waste generation rates and economic and population
figures due to the increase in recycling efforts in the community. The results are also reported of a small-scale survey to
explore the public attitude to waste recovery. The results show that most domestic householders have developed habits to carry
out separation of waste at source for recycling, but the amount of recyclables recovered was low. 相似文献
110.