The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In industrialized countries, soil and groundwater contamination with pesticides continues to be a contemporary problem. In this framework, the investigation of soil ability to immobilize these contaminants is of major concern, as a prerequisite for environmental remediation. In our study, the importance of sorption and persistence of pentachlorophenol (PCP) in three categories of Romanian soils was...
To reveal the migration and transformation rule of nitrogen in the vadose zone and groundwater and to determine the migration mathematical model, we researched the migration and transformation rule of ammonia nitrogen, nitrate nitrogen, nitrite nitrogen in the vadose zone and groundwater by the soil column leaching experiment. The results indicate: using ammonium bicarbonate shows a stronger alkalinity...
Based on the laboratory experiment, the variation of the fraction transformations and mobility of Cu and Zn in municipal sludge with pH were discussed in this study. The results show that pH has an important influence on the fraction transformations and mobility of Cu and Zn. The oxidizable fraction and residual fraction are the main ones of Cu in sludge solutions, While the percentage of acid soluble...
It is generally believed that the karst development, weak geotechnical property and rapid changes in hydrodynamic conditions of groundwater are the main factors to cause karst collapses, while we have insufficient understanding of the hydrochemical actions. Exploitation of groundwater has accelerated the process of partial water cycle, in addition that, water quality environment's changement such...
A small watershed in Zhongxian, Chongqing, was chosen to study the soil phosphorus content distribution in sloping field of different planting modes and assess the loss risk. The results were as follows:(1) In 2009, the average content of total soil phosphorus, available phosphorus and water soluble phosphate were 0.54±0.18 g/kg, 32.14±32.63 mg/kg and 2.46±2.21 mg/kg. The total phosphorus content...
In order to study potential contamination risk caused by leaching from bareroot seedling nursery to local ground waters, leaching of mineral nitrogen (N) and available phosphorus (P) was quantified in production of bareroot Changbai larch (Larix olgensis) seedlings, which is a common and economical tree species for afforestation and regeneration in North-eastern China. Experiment with 5 fertilization...
Eluent selection is the restrictive element in the leaching and extraction restoration techniques. Surfactant as a kind of eluent, it received extensive attention for removing organic pollutants and heavy metals at the same time. Numerous studies had shown that surfactant can remove pollutants from the soil effectively. It has a better removal effect on soil organic matter and heavy metals. Function...
Around 2300 tanneries in India produces 6000 tones of solid waste per annum, that includes 15000 tones of chromed leather shavings waste. This contain Chromium. Cr (VI) compounds used in leather processing which are highly water soluble, toxic, carcinogenic and a potential ground water contaminant. The MoEF have classified the chromium bearing solid wastes in the hazardous waste category that necessitates...
Because all aspects of reasons, some areas in China are subject to different levels of soil pollution, ecological environment, food security and agricultural sustainable development constitutes a threat, soil pollution, the situation is grim. Cleanup (or remediation) technologies available for reducing the harmful effects at heavy metal-contaminated sites include Solidification/Stabilization Technologies,...
Sixty households were surveyed in Jingxian County, Hebei Province, and Xinxiang County, Henan Province, North China. Sampling of ground water from wells showed that nitrate contents were no more than 3 mg l-1. In contrast, water samples drawn from Huantai County, Shandong Province, and Wenxian County, Henan Province gave nitrate contents for five water samples over the EC standard, reaching 95 mg...
In order to understand the effect of ash-flushing water from power plant on groundwater environment, the ash-flushing water in Baqiao power plant, xi'an is taken as a research object. The domestic water consumption of people was affected directly for the pollution of groundwater. To determine the groundwater contamination and the mechanism of water-rock interaction, two soil column experiments were...
Solidification/stabilization effect of FeSO4 and Ca(OH)2/CaO on chromium contaminated soil were studied by contrast, especially the effect of its reaction interval time and concentration. The change of S/S effect with time was also discussed. Results reveal that the reaction interval time effected on S/S slightly, with the high quality ratio of water to soil. As FeSO4 and Ca(OH)2 was used as the S/S...
It is important to evaluate and monitor the environmental impacts by the activity in our hand with appropriate methods, and the geophysical techniques have often been using in the subsurface environmental monitoring and remediation processes. In the study an Electromagnetic survey (EM) is performed to delineate deeply the extent of contamination at an industrial abandoned site, to detect the spread...
By the soil column experiments, the concentration of the pesticide's solute in the outlet flowing were derived. The model parameters are determined using Kinetic model of two-site absorption-desorption model through experimental results and the MATLAB program developed by the authors. Based on these, the trends of pesticide's solute transport at different time and depth in the soil column was estimated...
The petroleum hydrocarbon contaminant from oil industry can enter the soil and badly influence local environment. We take a groundwater system polluted by refinerypsilas discharged oil as research object in this paper. Firstly, we collect soil and groundwater samples in this area and perform soil column leaching experiments. The experiment results show that the pollution sources are sewage tank and...
Fluoride contamination transport and adsorption study is a hot subject of soil environment research. Dynamic adsorption, desorption and kinetics study can help us deeply understand the migration and transformation mechanism of fluoride in water and soil system, and provide theoretical basis for environmental assessment and treatment. This paper reveals the fluoride desorption law with the infiltration...
A study assessed the risk of nitrate (NO3--N) pollution in groundwater was conducted in Zhangye Oasis, Northwest China. The mean value of NO3--N concentrations of groundwater samples was 10.66plusmn0.19 mg/L, NO3--N concentrations exceeding 10 mg/L (the threshold of drinking water set by World Health Organization) was found in 32.4% of 71 wells, and were 13%, 33.3%, 52.4%, and 50.0% in the groundwater...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.