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Aquatic insects can accumulate pollutants such as cadmium from stream sediments. This research aimed to monitor cadmium concentrations in both larvae and adult Hydropsychidae (Trichoptera, Insecta) in Mae Tao (MT1 to MT5) and Mae Ku (MK2 and MK8) watersheds in northern Thailand. Samples were collected twice a month from July 2011 to May 2012 at seven sampling sites. The cadmium concentrations in the...
Air pollution is among the major problems stemming from modern urban life. Millions of people worldwide die from air pollution every year. Especially heavy metals have great importance among these pollutants. Because heavy metals can stay in nature for a long time without deterioration, and their concentration in the environment is constantly increasing. They also tend to bioaccumulate. Many heavy...
Our paper presents a simplified model of carbon dioxide concentrations in classrooms equipped with stack ventilation systems, based on experimental research. The test was conducted in six classrooms in the building of the Faculty of Civil and Environmental Engineering of Białystok University of Technology in northeastern Poland. The research included both classrooms that were not mechanically ventilated...
For this study we applied a biological restoration technology combined with introducing filterfeeding bivalves (Hyriopsis cumingii), stocking planktivorous fish (silver carp), and replanting submerged macrophytes (Ceratophyllum demersum L.) in order to treat eutrophic water. The effects of this combined biological restoration measure on remedying eutrophic water were investigated, and the main mechanisms...
A cubic crystal form Co₃O₄ was synthesized using the sol-gel method and applied as catalyst in the visible light-driven photocatalytic degradation of 1,2,4-trichlorobenzene (1,2,,4-TCB). 1,2,4-TCB removal efficiency initially increased and was followed by a gentle decrease as the Co₃O₄ dosage increased, with the optimal dosage of 2.0 g/L. The degradation rate changed positively with light intensity...
Cellulose-degrading strains play an important role in cellulose degradation at low temperatures. In this study, three cellulose-degrading strains with high carboxymethyl cellulase (CMCase) activity were isolated from the soil in a low temperature environment of 10ºC. ZS-7 was Cladosporium sp, ZS-8 was Alternaria porri, and ZS-10 was Trichoderma harzianum, based on 16s rDNA gene sequence analysis....
Environmental protection draws great attention worldwide due to the release of various harmful pollutants that represent risks or threats to animals and humans. Among these pollutants, endocrinedisrupting chemicals (EDCs) as environmental contaminants interfere with the normal hormonal functions in wildlife and humans. This study proposes multi-walled carbon nanotubes – (MWCNTs) pristine and oxidized,...
One of the most dangerous pollutants in the atmosphere is particulate matter (PM), which can be suspended in the air for weeks and has a negative impact on human health when inhaled. The most effective method for clearing the air of PM is through phytoremediation, whereby plants act as biological filters. PM also has a negative impact on plants, but knowledge of the effects of PM on the photosynthetic...
As an energy- and carbon-intensive sector, the textile industry has been the subject of many environmental policies. It has been under rigid regulation to promote energy conservation and emissions reduction in China, and a few scholars have carried out longitudinal and comprehensive studies of environmental policies aimed at the industry. This paper tries to fill in this gap by systematically analyzing...
As energy crises and environmental pollution become increasingly prominent, people are beginning to explore the ocean to exploit its renewable energy. Based on hydrodynamic principles, an analytical model for unstable hydrofoil motion has been developed. The software ANSYS Fluent was employed to perform a simulation of hydrofoil motion, and the effect of hydrofoil motion on the surrounding flow field...
In this study we investigated the projections of climate change and its impacts on the water resources of the Xin’anjiang watershed and optimal hydropower production using future run-offs (the decades of the 2020s, 2050s, and 2080s). The arc SWAT hydrological model and change factor downscaling technique were integrated to detect the run-offs and to downscale CMIP5 future climate variables, respectively...
The prediction of heavy metal pollution load at the soil-water interface of a mining area was studied through an improved soil and water assessment tool (SWAT) model. The Red Flag Mining Area of Xiangtan Manganese Mine in Hunan Province, China, was selected as the research district. GPS, ARCGIS, RS technology, and field experiments were employed in this study. A modified one-dimensional migration...
Pesticide formulations contain solvents and compounds that improve dispersion and absorption. One of the solvents employed in pesticide concentrates is xylene, an aromatic hydrocarbon widely used in paints, lacquers, or glues. This study was undertaken to evaluate the possible toxic effect of xylene on the giant cave cockroach Blaberus giganteus L. and its role in insecticide formulation toxicity...
The current investigation was undertaken to assess the toxic potential of synthetic insecticides (K.Othrin and bio-max) and botanical extracts (Mentha royleana L. and Artemisia absinthium L.) against Tribolium castaneum in the laboratory. Different concentrations of insecticides and botanical extracts were used following complete randomized block design. The results indicated that the toxic effects...
Pyrantel pamoate is a combination of pyrantel and pamoate used as a deworming agent for domesticated animals. This study investigated the sorption and transformation of pyrantel pamoate by birnessite (δ-MnO₂) under different conditions. Pamoate was first oxidized into keto naphthalene derivatives by manganese oxide. The pamoate degradation rate obeyed the second-order kinetic law, first order with...
The present study investigated heavy metal contaminations in Mangonbangon River, an urban river of Tacloban City, Philippines. Sediment samples were collected from 14 sampling sites and analyzed for total heavy metal content using acid digestion. Heavy metal concentrations ranged from 76.83-263.63 mg/Kg for Zn, 32.80-131.82 mg/Kg for Cr, 29.40-217.06 mg/Kg for Cu, 12.08-98.07 mg/Kg for Ni, 4.06-25...
In order to asses and evaluate the ecological potential of dammed storage reservoirs we need insight into the spatial structure of their hydrodynamics. This structure is influenced by a number of internal and external factors that may depend on each other. To understand these factors better it is necessary to find dependencies between them, to develop methods and techniques of building scenarios that...
This study describes the problems of managing biodegradable waste in the form of leaves in the thermochemical conversion process of waste biomass. The results of experimental studies of physicochemical properties of leaves of 4 selected tree species (i.e., oak, hazel, maple, and walnut) are shown. The study consisted of determining the energy parameters in the form of markings gross and net calorific...
The aim of this work was to ascertain the influence of applying various doses of organic fertilizers on the occurrence of the Carabidae and Staphylinidae families. The research was carried out in five treatments: 1) control treatment, 2) 25 t ha⁻¹ of farmyard manure, 3) 50 t ha⁻¹ of bio-sludge, 4) 50 t ha⁻¹ of farmyard manure, and 5) 100 t ha⁻¹ of bio-sludge. Coleoptera was represented by 87,324 individuals,...
As China has committed to the international community to effectively control CO₂ emissions, it is necessary for the regions of China to launch an in-depth analysis about energy use and CO₂ emission efficiency. In this paper, each province of China will be regarded as an independent decision-making unit. After judging their return to scale state by the traditional DEA theoretical model, we use the...
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