Tài liệu miễn phí Môi trường
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Evaluation of health risks associated with exposure to volatile organic compounds from household fuel combustion in southern India
Volatile organic compounds (VOCs) from household cook-fuel use are a major public health concern in low and middle income countries (LMICs), but health risk assessments have largely been based on measurements of fine particulate matter. We report results from cooking period measurements of 21 non-methane VOCs (NMVOCs).
4/5/2023 9:23:51 PM +00:00
The release process of microfibers: from surgical face masks into the marine environment
SEM and micro-FTIR analysis carried out onto surgical masks collected from Italian beaches highlighted the same morphological and chemical degradation signature observed in the masks subjected to the artificially weathering experiments, confirming the risks of a similar microfiber release into the marine environment.
4/5/2023 9:23:44 PM +00:00
Patterns of mega-forest fires in east Siberia will become less predictable with climate warming
This effect from climate makes it nearly impossible to segregate ignition points from locations, which were burnt several hours or even several days earlier. An increase in secondary burnt locations makes it difficult for machine learning algorithms to establish causality links with anthropogenic and other groups of variables.
4/5/2023 9:23:37 PM +00:00
Ultimate fate and toxicological consequences of insecticide pyriproxyfen and its metabolites in soil ecosystem
ation. However, their residues persisted for more than 30 days with variable half-lives ranged from 2.6 to 30 days. The toxicological study revealed that metabolites C, E and F were highly pernicious to soil enzymes sucrase, catalase, urease and dehydrogenase. PYR do not posed any detrimental effects in adult honeybees. Considering the persistence behavior and toxicological consequences of metabolites, further investigations are needed for preventing their harmful effect on non-target organisms and associated environment.
4/5/2023 9:23:30 PM +00:00
Geospatial modelling of soil erosion and risk assessment in Indian Himalayan region—A study of Uttarakhand state
The study was carried out to estimate the average annual soil erosion and risk area in the Uttarakhand State of Indian Himalayan region using various high-resolution geospatial data layers such as Global rainfall erosivity database, SOILGRIDS, CartoDEM as well as LULC data by employing Revised universal soil loss equation (RUSLE) model in a GIS environment.
4/5/2023 9:23:22 PM +00:00
Mineralization of persistent azo dye pollutants by a microaerophilic tropical lake sediment mixed bacterial consortium
This study explored the possibility of utilization of a microaerophilic mixed bacterial consortium from tropical lake sediment to conduct a single-step complete mineralization of two azo-class dyes Methyl Orange (MO) and Congo Red (CR). B
4/5/2023 9:23:15 PM +00:00
Polyaniline-coated core-shell silica microspheres-based dispersive-solid phase extraction for detection of benzophenone-type UV filters in environmental water samples
The method is successfully applied for ultrasensitive detection of trace amount benzophenone-type UV filters in environment water samples. It is indicated that the method has the advantages of rapid and efficient enrichment, high sensitivity, and excellent repeatability. Our study extends the application of core-shell mesoporous silica materials and would be of value for pretreatment of trace-amount and complex real samples.
4/5/2023 9:23:08 PM +00:00
Arsenic speciation in titanium dioxide (TiO2) waste produced via drinking water filtration: Potential environmental implications for soils, sediments, and human health
Synchrotron-based X-ray absorption spectroscopy (XAS), specifically X-ray absorption near edge structure (XANES) spectroscopy, indicated the dominant species of As in soil and sediment samples was arsenate [As(V)], which is similar to the chemical form of As in the groundwaters of this region. No evidence of arsenite [As(III)] was identified in any of the solid-phase samples, including earthworm castings.
4/5/2023 9:23:00 PM +00:00
Lepidolite extraction solid by-product: Mitigation of thallium leaching and utilization of radiogenic strontium isotopes as a tracer
The emerging growth of lithium-ion battery usage necessitates the development of unconventional resources for battery grade lithium carbonate. Extraction of lithium from micas such as lepidolite produces several marketable by-products as well as a silt-sized gypsum rich blended residue containing elevated level of thallium (Tl).
4/5/2023 9:22:50 PM +00:00
Chemical characteristics, source apportionment, and regional contribution of PM2.5 in Zhangjiakou, Northern China: A multiple sampling sites observation and modeling perspective
Weather Research and Forecast model (WRF) was coupled with Comprehensive Air Quality Model with Extensions (CAMx), and found that regional transport contributed significantly to PM2.5 pollution in Zhangjiakou (74.6%). The results of this study indicate that joint prevention and control of regional air pollution would meaningfully improve air quality in the BTH region.
4/5/2023 9:22:43 PM +00:00
Synergistic effects of vehicular emissions (NO2, SO2 and SPM) on progression of Crocus sativus L.in Saffron bowl Kashmir
The aforesaid findings manifest that vehicular emission is a vital factor impacting the progression of Crocus sativus. It is of utmost importance to mention here that on reducing vehicular emissions the progression of Crocus sativus can be increased substantially. Moreover, our results can also contribute in developing pollution models and hence reduce crop damage thereof.
4/5/2023 9:22:35 PM +00:00
Environmental fate of pesticides in open field and greenhouse tomato production regions from Colombia
Methomyl and dimethomorph were common in fruits, leaves and soils for both regions; in addition, seven pesticides exceeded the Maximum Residue Limits. The results showed a high presence and affinity of pesticides in the environmental compartments of high-Andean tomato production regions, mainly in soils and open field productive systems.
4/5/2023 9:22:24 PM +00:00
Bioaccumulation and toxicity of oxaliplatin in fresh water: A study with Lemna minor
The majority of oxaliplatin taken up by L. minor (about 66 to 84%) was internalised, presumably through passive diffusion and, possibly, uptake through transporters. Among the end-points tested, only relative growth rate of frond area and ion leakage were adversely affected at the medium and/or high concentrations employed.
4/5/2023 9:22:14 PM +00:00
Optimization of EC parameters using Fe and Al electrodes for hydrogen production and wastewater treatment
The process resulted into a removal efficiency of 91.8 % of COD, 94.3 % in the case of BOD and 96.5 % in the case of turbidity after treatment of 30 minutes with the combination of Al (at cathode) and Fe (at anode) with mono-polar electrode connection in parallel.
4/5/2023 9:22:07 PM +00:00
Heavy metal enrichment and potential ecological risks from different solid mine wastes at a mine site in Ghana
These results highlight the need for proper solid mine wastes characterization to drive management decisions aimed at reducing heavy metal contamination of surrounding soils and the associated potential environmental and human health risks.
4/5/2023 9:22:01 PM +00:00
Individual and combined effects of ethylenediurea (EDU) and elevated carbon dioxide (ECO2), on two rice (Oryza sativa L.) cultivars under ambient ozone
The present field experiment assesses the individual and combined effects of ethylenediurea (EDU, 200 ppm) and elevated CO2 (ECO2, 550 ppm), on two rice (Oryza sativa L.) cultivars, Sarjoo-52 and Pusa Basmati-1(PB-1) under FACE (Free Air Concentration Enrichment) facility.
4/5/2023 9:21:48 PM +00:00
Facile fabrication of nano zerovalent iron – Reduced graphene oxide composites for nitrate reduction in water
The association of Fe (0) on the reduced graphene oxide matrix is believed to occur via
4/5/2023 9:21:42 PM +00:00
Turbidimetric study for the decontamination of paint effluent (PE) using mucuna seed coagulant (MSC): Statistical design and coag-flocculation modelling
The particle load removal isotherm model followed the Langmuir model. Therefore, it can be inferred from the study that MSC can be used effectively in coag-flocculation for removal of particle load from paint effluent (PE).
4/5/2023 9:21:34 PM +00:00
Plant diversity and local rainfall regime mediate soil ecosystem functions in tropical forests of north-east Bangladesh
The importance of local climate and biodiversity in tropical forest’s ability to provide critical ecosystem services is well documented, whereas the relationship among local climatic factors and biodiversity with soil ecosystem functions largely remain unclear.
4/5/2023 9:21:27 PM +00:00
DeNOx removal techniques for automotive applications – A review
The effect of temperature and uniform distribution of ammonia associated to these technologies were critically reviewed. Factors impeding the integration of these technologies in the automotive industry were also discussed Possible solutions to mitigate these challenges were proposed.
4/5/2023 9:21:19 PM +00:00
Zeolite synthesis from low-cost materials and environmental applications: A review
Among different synthesis methods, hydrothermal method is commonly found to be used widely in the synthesis of various zeolites from inexpensive raw materials such as fly ash, rice husk ash, blast furnace slag, municipal solid waste, paper sludge, lithium slag and kaolin. Besides, future expectation in the field of synthetic zeolites research is also included.
4/5/2023 9:21:09 PM +00:00
Pollution and health risks assessment of nitrate and phosphate concentrations in water bodies in South Eastern, Nigeria
The nutrient pollution index showed moderate to very high pollution while the waterbodies will pose very high non-carcinogenic health risks to users via the oral pathway. Overall, the waterbodies are at risk of eutrophication and efforts should be put in place to reduce anthropogenic activities around the area and thus input of nutrients in these water bodies.
4/5/2023 9:21:02 PM +00:00
Carbon mass balance model to investigate biochar and activated carbon amendment effects on the biodegradation of stable-isotope labeled toluene in gravelly sand
The amending soils with 2% BC or AC changed the biokinetics of VPH degradation by rendering VPHs less bioavailable, but did not appear to have any detrimental effects on VPH degradation and may serve as a sustainable, cost-effective approach for enhancing the natural attenuation of VPHs in soil on the long term.
4/5/2023 9:20:52 PM +00:00
Phthalates in Avicennia schaueriana, a mangrove species, in the State Biological Reserve, Guaratiba, RJ, Brazil
The observed chemical profile was rich in secondary metabolites, predominantly lupeol and
4/5/2023 9:20:41 PM +00:00
Fe3O4 loaded chitin – A promising nano adsorbent for Reactive Blue 13 dye
The mechanism of dye-adsorbent interaction is described on the basis of zero-point charge and zeta potential techniques. Batch adsorption studies on MCH NM show excellent adsorption activity of 199.02 mg/g in 22 min towards RB13 dye, maximum value ever reported for any reactive dye. Equilibrium adsorption data and adsorption kinetics were well fitted into Langmuir isotherm model and pseudo second order model predicting chemically rate controlled monolayer adsorption.
4/5/2023 9:20:33 PM +00:00
Magnetically recoverable nanoparticles for the simultaneous removal of Sb and As from water
This study examines the development of a nanocomposite consisting of iron oxy-hydroxides (FeOOH) embedded on magnetite (Fe3O4) nanocarriers, towards its application for the simultaneous uptake of As(V) and Sb(V) ionic forms at concentrations below drinking water regulation and its magnetically-assisted recovery at the end of the process.
4/5/2023 9:20:26 PM +00:00
Spatial distribution, pollution index, receptor modelling and health risk assessment of metals in road dust from Lagos metropolis, Southwestern Nigeria
This study assessed the spatial distribution, pollution index, receptor modelling and health risk of metals in road dust samples from Lagos metropolis, Southwestern Nigeria. Paved and unpaved road dust samples were collected from twenty locations for three consecutive months
4/5/2023 9:20:12 PM +00:00
Stubble burning: Effects on health & environment, regulations and management practices
In addition to its effects on air quality, stubble burning also affects soil fertility (through the destruction of its nutrients), economic development and climate. The crop stubbles (if managed properly) could provide immense economic benefits to the farmers and protect the environment from the severe pollution. Some of the alternative management practices include the incorporation of the stubble into the soil, use of stubble as fuel in power plants, use as raw material for pulp and paper industries, or as biomass for biofuel production.
4/5/2023 9:20:04 PM +00:00
Application of magnetic nanoparticles for water purification
The main goal of this work was to develop a water purification technology using magnetic nanoparticles, to be applied in a water outlet point where the contact time between the two phases is minimal.
4/5/2023 9:19:57 PM +00:00
Monitoring cyanobacterial harmful algal blooms at high spatiotemporal resolution by fusing Landsat and MODIS imagery
The proposed approach consists of two steps: (1) a new CyanoHAB spectral index called Broad Wavelength Algae Index (BWAI) is developed for fine-but-sparse (Landsat) and coarse-but-frequent (MODIS) satellite images, and (2) the Landsat and MODIS derived BWAI images are fused by the Robust Adaptive Spatial and Temporal Fusion Model (RASTFM) to generate fine-and-frequent Landsat-like BWAI images.
4/5/2023 9:19:45 PM +00:00