Tài liệu miễn phí Môi trường
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Survey of airborne organic compounds in residential communities near a natural gas compressor station: Response to community concern
Our results validate the community members’ concerns and necessitate a more comprehensive epidemiological investigation into the exposures associated with natural gas compressor stations and methods to mitigate elevated exposures.
4/5/2023 9:28:00 PM +00:00
Varietal variation and formation of iron plaques on cadmium accumulation in rice seedling
This study results demonstrated that boosted Fe plaque formation can minimize detrimental effects of Cd on rice shoot growth to some extent, but the root tissues are the main barrier to Cd accumulation and movements in the interior of the rice plants.
4/5/2023 9:27:51 PM +00:00
Effects of cypermethrin as a model chemical on life cycle and biochemical responses of the tropical stingless bee Meliponula bocandei Spinola, 1853
The significant alterations were observed in SOD, CAT, GST and AChE activity for both oral and contact exposure pathways. In conclusion, cypermethrin modulated the activities of biomarkers of oxidative stress and altered the level of energy metabolites in the bees.
4/5/2023 9:27:43 PM +00:00
Changes in precipitation patterns in Houston, Texas
The results indicate a statistically significant increase in extreme rainfall at the expense of light, moderate, and heavy rainfall over time. The only negative relationship is found in dry days. The most statistically significant trends exist in the 99th percentile, maximum, and R100 parameters with p-values of 0.07, 0.08, and 0.11, respectively
4/5/2023 9:27:35 PM +00:00
Eco-safe chemicothermal conversion of industrial graphite waste to exfoliated graphene and evaluation as engineered adsorbent to remove toxic textile dyes
The success of converting graphite waste to an engineered dye adsorbent couples the advantages of converting industrial waste to a beneficial product and removal of toxic dyes thus achieving the circular economy and sustainable development in industrial practices.
4/5/2023 9:27:25 PM +00:00
Fungi for the bioremediation of pharmaceutical-derived pollutants: A bioengineering approach to water treatment
In this work, we review various PhCs detected in water treatment plants. We propose that fungi, particularly white-rot fungi (WRF), can be used for their bioremediation and describe the main mechanisms used for degrading this type of emerging pollutants; however, we also highlight the need to prospect for new fungal models.
4/5/2023 9:27:18 PM +00:00
Copper affects photosynthetic parameters of N- or P-limited Ankistrodesmus densus
In the present study, to evaluate a microalga’s responses to a macronutrient’s limitation and the excess to a micronutrient, we acclimated the well-distributed freshwater microalga Ankistrodesmus densus to N- or P-limited medium before exposing it to sublethal copper (Cu) concentrations.
4/5/2023 9:27:11 PM +00:00
Effects of larval exposure to the fungicide pyraclostrobin on the post-embryonic development of Africanized Apis mellifera workers
The ingestion of the fungicide in the larval stage can impair the bee development and the health and performance of the colony. In this perspective, studies that consider the effects of fungicides in the different stages of bee development are crucial for a better interpretation of the risks of exposure.
4/5/2023 9:27:04 PM +00:00
Intercropping and mulching in rain-dependent cotton can improve soil structure and reduce erosion
This study pointed out that growing an intercrop and retaining its residues as in situ mulch between the cotton rows can improve soil condition by increasing soil microstructure, water stable aggregation and infiltration rate, and reducing run-off and soil loss.
4/5/2023 9:26:58 PM +00:00
Metal-free polymeric carbon nitride photocatalytic bactericide: Precursor-controlled killing activity of E. coli
The photocatalytic sterilization activity of polymeric carbon nitride is closely related to its microstructure. In this study, four kinds of polymeric carbon nitride were prepared with melamine, dicyandiamine, thiourea and urea as precursors respectively.
4/5/2023 9:26:47 PM +00:00
The application of tape lifting for microplastic pollution monitoring
This paper sets out a workflow that addresses these shortcomings. Tape lifting (a forensic approach to particulate recovery) is at the heart of this workflow. This technique uses self-adhesive tape to recover particles of interest and results in a tape lift in which those particles are held between the tape and a sheet of suitable material.
4/5/2023 9:26:37 PM +00:00
Life cycle analysis approach to comparing environmental impacts of alternative materials used in the construction of small wastewater treatment plants
The results showed that SS demonstrated substantially higher impact in total (5.47 Pt) and across each of the endpoint categories, most notably human health (3.12 Pt). Further investigations demonstrated that this was largely fed by the respiratory inorganics midpoint category that accounted for 50 % of the total impact (2.75 Pt).
4/5/2023 9:26:30 PM +00:00
Photodegradation of Reactive Black 5 and raw textile wastewater by heterogeneous photo-Fenton reaction using amino-Fe3O4-functionalized graphene oxide as nanocatalyst
RTW photodegradation experiments exhibited removal efficiencies of 53.25 % for apparent color, and 64.55 % for turbidity. Phytotoxicity assays using cucumber seeds showed low toxicity of the samples after photodegradation, which indicated that toxic compounds were fully mineralized.
4/5/2023 9:26:23 PM +00:00
Biostimulant and biopesticide potential of microalgae growing in piggery wastewater
Pig farming generates highly polluting wastewaters which entail serious environmental issues when not adequately managed. Microalgae systems can be promising for cost, energy and environment-efficient treatment of piggery wastewater (PWW). Aside from clean water, the produced biomass can be used as biostimulants and biopesticides contributing to a more sustainable agriculture.
4/5/2023 9:26:15 PM +00:00
Envisioning an international validation process for New Approach Methodologies in chemical hazard and risk assessment
To build trust across many sites (laboratories, regulatory agencies, contract research organizations, chemical producers, and the public), stakeholders will need to agree on validation requirements for particular uses (content in relation to context) as well as how results are to be communicated (data format), and measured (metrics). There is also a need for a global orchestrator, who can exert leadership and inspire voluntary cooperation of diverse organizations to address shared validation goals, to play a key role.
4/5/2023 9:26:06 PM +00:00
Salt marsh sediments act as sinks for microplastics and reveal effects of current and historical land use changes
The sedimentary record confirmed that microplastics have been accumulating in these estuaries since the early 1950s, and their abundances have increased greatly in more recent years in response to the progressive urbanization of the watersheds and intensification of land uses. Our results highlight the role of salt marsh sediments as sinks for microplastics in the marine environment.
4/5/2023 9:25:56 PM +00:00
Impact of green roof plant species on domestic wastewater treatment
Water quality indicated by chemical oxygen demand, total nitrogen, ammonium nitrogen, and total phosphorus from the effluent complied with the widely accepted limits on domestic wastewater discharge. Our results demonstrate that green roofs can be designed for the ecological treatment of domestic wastewater on the household scale.
4/5/2023 9:25:48 PM +00:00
A novel bio-physical approach for perchlorate contaminated well water treatment
The rejects and membrane wash water were also treated in the bioreactor, resulted in complete removal of ClO4 ¯ through this approach. This is the first report where biotreatment is adopted as a pre- and post-treatment to membrane process for removing ClO4 ¯ , and this will find field application for treating ClO4 ¯ contaminated ground as well as surface water sources.
4/5/2023 9:25:42 PM +00:00
Lead geochemistry of sediments in Galveston Bay, Texas
The geochemical behavior of Pb in terrestrial and coastal water systems significantly influences Pb biogeochemical cycling and pollutant exchange at the land-sea continuum. An ideal case study of Pb environmental geochemistry is Galveston Bay, an anthropogenic estuary exposed to industrial runoff, wastewater and shipping vessel spills but also fed by natural rivers.
4/5/2023 9:25:30 PM +00:00
Precipitation as the main mechanism for Cd(II), Pb(II) and Zn(II) removal from aqueous solutions using natural and activated forms of red mud
This finding raise doubt about the effectiveness of the traditional adsorption isotherms and kinetics models to describe trace metals removal using RM, contributing with new insights for future researches involving these hazardous materials.
4/5/2023 9:25:21 PM +00:00
Molten salt synthesis of gadolinium boride nanocrystals suitable for methyl blue removal
In addition to reduction, MB decolorization mainly results from adsorption on the surface of GdB6 based on the adsorption-desorption tests. The adsorption behavior follows the pseudo-second-order kinetics and Freundlich isotherm model.
4/5/2023 9:25:10 PM +00:00
Complex environmental contaminant mixtures and their associations with thyroid hormones using supervised and unsupervised machine learning techniques
Bayesian kernel machine regression (BKMR) analysis was used to evaluate the univariate contaminant exposure effect as well as the contaminant mixture effects on levels of thyroid hormones. Significant and positive associations were found between total T3 and PC-2 (high positive nickel and cadmium loadings), total T3 and PC-3 (negative association with negative loading for nickel and positive loading for cadmium) and TSH and PC-1 (high positive loadings for organic contaminants).
4/5/2023 9:24:59 PM +00:00
Perfluorooctanoic acid (PFOA) induces behavioural, reproductive and developmental toxicological impacts in Caenorhabditis elegans at concentrations relevant to the contaminated areas
The potential toxic impacts of PFOA on human and ecological health is becoming an increasing concern worldwide. In this study, we investigated the acute toxicity of PFOA in terms of growth, mortality, lifespan, neurobehaviour, fecundity and livelihood in Caenorhabditis elegans (C. elegans)
4/5/2023 9:24:51 PM +00:00
Comparative profiling of epigenetic modifications among individuals living in different high and low air pollution zones: A pilot study from India
This was further confirmed by the analysis of a target gene panel involved in various signalling pathways, which revealed differential expression of the gene transcripts regulating cell cycle, inflammation, cell survival, apoptosis and cell adhesion. Together, our results provide first insights of epigenetic modifications among individuals living in different high and low levels of air pollution zones of India.
4/5/2023 9:24:44 PM +00:00
Sublethal neonicotinoid exposure attenuates the effects of electromagnetic fields on honey bee flight and learning
The results indicate no evidence of synergy between clothianidin and ELF EMFs as environmental stressors but suggest the potential for EMFs to affect the same susceptible fraction of the bee population that have been affected by clothianidin. Results lay the foundation to further explore the interactions of ELF EMFs with other environmental stressors and consider the key factors that may make bees susceptible to ELF EMFs.
4/5/2023 9:24:37 PM +00:00
Compound specific isotope analysis (CSIA) of phthalates and non-targeted isotope analysis (NTIA) of SPE-extractable organic carbon in dilute aquatic environments
Isotope ratio analysis of total organic carbon (TOC) is well-established for the study of rivers, lakes, and oceans. Similarly, these aquatic systems are routinely surveyed to quantify natural and anthropogenic organic compounds and pollutants, including such things as pharmaceuticals, illicit drugs, and phthalates.
4/5/2023 9:24:29 PM +00:00
Environmental contaminant body burdens and the relationship with blood pressure measures among Indigenous adolescents using Bayesian Kernel Machine Regression: Results from the Nituuchischaayihtitaau Aschii: Multi-Community Environment-and-Health Study in Eeyou Istchee, Quebec, Canada, 2005–2009
This study examined body burdens of environmental contaminants and blood pressure measurements (BP) among adolescents. Early onset hypertension among youth has important cardiovascular health implications later in life. Persistent organochlorine pollutants, polybrominated diphenyl ethers (PBDEs), and toxic metals have been associated with adverse cardiovascular outcomes.
4/5/2023 9:24:18 PM +00:00
Bioaccessibility and source-specific health risk of heavy metals in PM2.5 in a coastal city in China
Based on the combined positive matrix factorization-health risk (PMF-HR) model, industry, combustion, and traffic emission contributed the most to the health risk of Cr and Cd, followed by soil parent material layer. Our study provided a reliable method to calculate the bioaccessible heavy metal health risk and determine each potential source’s contribution to health risk.
4/5/2023 9:24:11 PM +00:00
A preliminary study on the detection of potential contaminants in the European brown hare (Lepus europaeus) by suspect and microplastics screening
This pilot study was aimed to provide evidence for the occurrence of environmental contaminants in body fluids, tissues and faces of wild brown hares from Pellworm/Germany and Lower Austria/Austria, as well as of indoor control hares from Vienna/Austria.
4/5/2023 9:24:04 PM +00:00
Toxicity of metal cations and phenolic compounds to the bioluminescent fungus Neonothopanus gardneri
The current bioluminescent assay, which uses a fungus of the Omphalotus lineage, fills a gap covering all the representative species of bioluminescent fungi. Among the compounds tested here, Cd(II) showed the highest toxicity, followed by 4-nitrophenol, phenol and Cu(II).
4/5/2023 9:23:58 PM +00:00