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1.
Background, aim and scope Mixed pollution with trace elements and organic industrial compounds is characteristic for many spill areas and dumping sites.
The danger for the environment and human health from such sites is large, and sustainable remediation strategies are urgently
needed. Phytoremediation seems to be a cheap and environmentally sound option for the removal of unwanted compounds, and the
hyperaccumulation of trace elements and toxic metals is seemingly independent from the metabolism of organic xenobiotics.
However, stress reactions, ROS formation and depletion of antioxidants will also cause alterations in xenobiotic detoxification.
Here, we investigate the capability of plants to detoxify chlorophenols via glutathione conjugation in a mixed pollution situation. 相似文献
2.
Purpose Plants can absorb a diversity of natural and man-made toxic compounds for which they have developed diverse detoxification
mechanisms. Plants are able to metabolize and detoxify a wide array of xenobiotics by oxidation, sugar conjugation, glutathione
conjugation, and more complex reactions. In this study, detoxification mechanisms of dimethomorph, a fungicide currently found
in aquatic media were investigated in Elodea canadensis. 相似文献
3.
Purpose Besides classical organic pollutants and pesticides, pharmaceuticals and their residues have nowadays become recognized as
relevant environmental contaminants. The risks of these chemicals for aquatic ecosystems are well known, but information about
the pharmaca-plant interactions and metabolic pathways is scarce. Therefore, we investigate the process of uptake of acetaminophen
( N-Acetyl-4-aminophenol) by Brassica juncea, drug-induced defense responses and detoxification mechanisms in different plant parts. 相似文献
4.
Purpose The anti-inflammatory drug naproxen (NPX) has been found as a micropollutant in river water downstream the discharge points
of wastewater treatment plants (WWTP). In this study, rainbow trout ( Oncorhynchus mykiss) was exposed to NXP and the uptake and metabolism of the drug was studied. 相似文献
5.
Indoor air pollutants comprise both polar and non-polar volatile organic compounds (VOCs). Indoor potted plants are well known for their innate ability to improve indoor air quality (IAQ) by detoxification of indoor air pollutants. In this study, a combination of two different plant species comprising a C3 plant (Zamioculcas zamiifolia) and a crassulacean acid metabolism (CAM) plant (Sansevieria trifasciata) was used to remove polar and non-polar VOCs and minimize CO2 emission from the chamber. Z. zamiifolia and S. trifasciata, when combined, were able to remove more than 95% of pollutants within 48 h and could do so for six consecutive pollutant’s exposure cycles. The CO2 concentration was reduced from 410 down to 160 ppm inside the chamber. Our results showed that using plant growth medium rather than soil had a positive effect on decreasing CO2. We also re-affirmed the role of formaldehyde dehydrogenase in the detoxification and metabolism of formaldehyde and that exposure of plants to pollutants enhances the activity of this enzyme in the shoots of both Z. zamiifolia and S. trifasciata. Overall, a mixed plant of Z. zamiifolia and S. trifasciata was more efficient at removing mixed pollutants and reducing CO2 than individual plants. 相似文献
6.
Background, aim, and scope This study developed an integrated approach to identify pollutant sources of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) of workers based on their blood contents. 相似文献
7.
Background, aim, and scope Along transects under a mixed woodland of English Oak ( Quercus robur) and Common Ash ( Fraxinus excelsior) growing on a trichloroethylene (TCE)-contaminated groundwater plume, sharp decreases in TCE concentrations were observed,
while transects outside the planted area did not show this remarkable decrease. This suggested a possibly active role of the
trees and their associated bacteria in the remediation process. Therefore, the cultivable bacterial communities associated
with both tree species growing on this TCE-contaminated groundwater plume were investigated in order to assess the possibilities
and practical aspects of using these common native tree species and their associated bacteria for phytoremediation. In this
study, only the cultivable bacteria were characterized because the final aim was to isolate TCE-degrading, heavy metal resistant
bacteria that might be used as traceable inocula to enhance bioremediation. 相似文献
8.
Background, aim, and scope The optimal conditions of o-toluidine degradation by fluidized-bed Fenton process were determined using Box–Behnken designs (BBD). The BBD can be used
to find the optimal conditions in multivariable systems. The optimal conditions obtained by the design were further applied
in the kinetic analysis of o-toluidine oxidation in fluidized-bed Fenton process. 相似文献
9.
Background, aim, and scope In this study, a suite of sublethal stress biomarkers were analyzed in juveniles of the sentinel species, the Pacific oyster
Crassostrea gigas, with a view to using them as pollution monitoring tools. The aim of this work was (1) to study baseline seasonal variations
of biomarkers in different body compartments of C. gigas in the reference site and, after selecting biomarkers presenting no seasonal variations, (2) to compare responses of these
biomarkers between contaminated and reference sites. 相似文献
10.
Background, aim, and scope
It can be learned from the Pistacia spp. germplasm collection () that the growth of Salsola inermis is inhibited in the vicinity of the evergreen Pistacia lentiscus, but not in the surroundings of the deciduous Pistacia atlantica and Pistacia chinensis. Irrigation of trees during the summer months increases soil salinity around the trees. It was therefore hypothesized that
inhibition of S. inermis around P. lentiscus is related to depletion of salt in the vicinity of the latter species. 相似文献
11.
Background, aim, and scope The present study focuses on the temporal concentration changes of four common organic pollutants in small freshwater streams
of Hesse, Germany. The substances (tris(2-chloroethyl)phosphate (TCEP), the technical isomer mixture of 4-nonylphenol (NP),
2-( t-butylamino)-4-(ethylamino)-6-(methylthio)- s-triazine (terbutryn), and N, N-diethyl- m-toluamide (DEET)) are subject to differing regulations. Whereas the use of NP and the related nonylphenolethoxylates (NPEOs)
are almost completely banned under EU directive 2003/53/EC, the herbicide terbutryn is only restricted for use as a herbicide
in the majority of member states of the European Union (EU). In contrast, TCEP and DEET are not regulated by legislation,
but have been replaced in some products through consumer pressure. The impact of regulation on the environmental concentrations
of these pollutants is discussed. 相似文献
12.
Background, aim, and scope Ferro-cyanide is one of the commonly found species at cyanide-contaminated soils and groundwater. Unlike botanical metabolism
of KCN via the β-cyanoalanine pathway, processes involved in the plant-mediated assimilation of ferro-cyanide are still unclear.
The objective of this study was to investigate a possible mechanism involved in uptake and assimilation of ferro-cyanide by
plants. 相似文献
13.
Background, aim, and scope Composting is being proposed as a pretreatment step before disposal of metal-rich biomass after phytoextraction process. This
study determined the biomass reduction and arsenic transformation during composting As-rich biomass of hyperaccumulator Chinese
brake fern ( Pteris vittata L.). 相似文献
14.
Introduction Arsenic (As) can be removed from water via rhizofiltration using phytostabilizing plants. The aim of this study was to investigate
the performance of Eleocharis macrostachya in constructed wetland prototypes, as well as the plant's arsenic mass retention and the distribution of As along the wetland
flow gradient and the soil in the wetland mesocosmos. 相似文献
15.
Background, aim, and scope The disposal problem due to non-degradable petroleum-based plastics has raised the demand for biodegradable polymers. The
degradation of poly (lactic acid) (PLA) has been studied for several years, but the understanding of involved mechanisms is
still incomplete. Based on our previous studies, and it is hypothesized an enzymatic involvement, the aim of this study was
to continue investigations on the degradation of PLA and its nanocomposites by Bacillus licheniformis. 相似文献
16.
Background, aim, and scope Experimental data on partition coefficients and environmental half-lives of sulfur analogs of polychlorinated organic compounds
are scarce. Consequently, little is known about their overall persistence and long-range transport potential, which are the
most vital measures in the environmental exposure assessment. We performed Multimedia Modeling of environmental fate and transport
to complement this paucity of scientific data. The main aim of our study was to investigate whether the sulfur analogs of
polychlorinated dibenzo- p-dioxins, -dibenzofurans, and -diphenylethers are as environmentally persistent and/or mobile as their oxygen counterparts
and to propose the environmental exposure-related classification of the examined sulfur compounds. 相似文献
17.
Background, aim, and scope In recent years, anthropogenic chemicals which can disrupt the hormonal systems of both humans and wildlife have been raised
to a major cause of concern. The aim of the present work was to determine the bioconcentration factors of the two major alkylphenols
(AP) of the Seine Estuary [4-nonylphenol (4 NP) and nonylphenol acetic acid (NP1EC)] and of the synthetic estrogen, estrogen
ethinylestradiol (EE2), in Eurytemora affinis after exposure in a continuous flow-through system under environmental realistic conditions. Moreover, the elimination of
these compounds in copepods from the Seine Estuary has been investigated by measuring concentrations after 1 week in clean
water in comparison to background levels. 相似文献
18.
Purpose Some of the pharmaceuticals that are not extensively investigated in the aquatic environment are the anesthetic lidocaine
(LDC), the analgesic tramadol (TRA), and the antidepressant venlafaxine (VEN). LDC metabolizes to 2,6-xylidine (2,6-DMA) and
monoethylglycinexylidine (MEGX), TRA to O-desmethyltramadol (ODT), and VEN to O-desmethylvenlafaxine (ODV). Within this study, the distribution and behavior of these compounds in German wastewater treatment
plants (WWTPs) were investigated. 相似文献
19.
Purpose China’s freshwater subtropical shallow lakes are increasingly eutrophic and susceptible to production of heavy growths or
water blooms of cyanobacteria. One example was the heavy water bloom that occurred for the first time in Lake Xuanwu, in 2005,
an urban lake located in Nanjing city. The aim of the present study was to determine dynamics of water bloom dominating Microcystis in this lake. Meanwhile, the relationship between environmental factors and Microcystis populations was also analyzed. 相似文献
20.
Background, aim, and scope Olive oil mill wastewater (OOMW) environmental impacts minimization have been attempted by developing more effective processes,
but no chemical or biological treatments were found to be totally effective to mitigate their impact on receiving systems.
This work is the first that reports simultaneously the efficiency of three different approaches: biological treatment by two
fungal species ( Trametes versicolor or Pleurotus sajor caju), enzymatic treatment by laccase, and chemical treatment by photo-Fenton oxidation on phenols removal. 相似文献
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