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Arsenic displays complex nature in groundwater. The study of geochemical properties of arsenic in groundwater enables not only the prediction of arsenic pollution trend in groundwater, but also the prevention and mitigation of arsenic pollution. This article is mainly about using soil column dynamic experiment to simulate the arsenic kinetic behavior when it migrates in groundwater environment. Studies...
This paper researched on the adsorption kinetics and thermodynamics of the typical component of petroleum hydrocarbons-phenanthrene on the four typical media: silty sand, medium sand, coarse sand, and gravel sand from the aquifer in an oil field, with a self-made rotary adsorption device. The result showed that the adsorption kinetics of phenanthrene on the four aquifer media accords with the pseudo-second-order...
Based on GOD method and DRASTIC model for groundwater vulnerability assessment, in this paper, VLDA model for assessing phreatic water vulnerability is proposed, where V is lithology of vadose zone, L is the pattern of land use, D is groundwater depth, A is the aquifer characteristics. As a case study, the paper assesses the vulnerability of phreatic water in Yanji County of Xinjiang by using the...
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...
With investigation in field and assay in the lab, the current situation and influencing factors of groundwater nitrate nitrogen (hereinafter referred to as NO3- - N) content in the regions surrounding Bohai Sea in Hebei province were studied. The results show that the contents of groundwater NO3- - N in the regions generally meet the level III criterion of GB/T14848-93. However, the spatial variability...
The Distribution of shallow groundwater containing beryllium were summarized and the major factors influencing beryllium enrichment were discussed in this paper, based on chemical data of Be, aluminum and pH from more than 900 groundwater samples in the Pearl River Delta. The results show that Be concentration ranges from less than 0.02μg·L-1 to 40.3μg·L-1, with the majority less than 0.05μg·L-1 and...
Fuzzy mathematics method is used to evaluate the groundwater quality in Yang village. The groundwater quality of 18 villages belongs to V level water (GB/T14848-9 Quality standard for ground water) in the study area, where water pollution is very serious. Polluted area mainly includes the sandy soil region in northeast Yang village and east bank villages in western Beijing-Hangzhou Canal. Yinma village...
The efficiency of electrokinetic remediation of Cu contaminated groundwater was researched by means of experiments for the complicated remediation of groundwater contaminated by typical heavy metal in this paper, and migration and variation characteristics of Cu was analyzed too. The experimental results indicated that the pH value varied obviously during the electrokinetic remediation because of...
The term of quasi-saturated soil is not currently used in the literatures. However this type of soils is distributed extensively, such as the soils formulated by air sparging as a remediation technology for treatment of contaminated aquifers. In engineering, quasi-saturated soils are usually considered as saturated soils. Nevertheless the characteristic of quasi-saturated soils is very different from...
In view of the independence and disagreement of each index in the groundwater quality evaluating, projection pursuit evaluating model is applied to groundwater quality evaluation, and real coding based accelerating genetic algorithm is introduced to optimize the projection direction so that multi-dimension data can be turned into low dimension space. The value of projection function can be calculated...
14 kinds of PCBs were determined in water and soil of a paddy field in Dragon Bridge, Nanjing, P. R. China, which is a typical small watershed irrigated area. The results showed that: 14 congeners of PCBs were detected at different residue levels, the dominant components of PCBs were tri-, tetra-, and penta-chlorinated PCB congeners, accounting for 82.37% ~ 95.45% of total PCBs. The concentration...
Tehran's refinery is located in south of Tehran metropolitan and is one of the oldest Iran's refineries. Currently, 500-700 barrels of petroleum pollutants are collected from the nearby village and underground waters in the peripheries of the refinery every day so in recent years, public sensitivity is focused on its impacts. The main target of this project is the study of the critical environmental...
This study aims to assess the groundwater pollution potential by Beheshte Zahra Cemetery, Tehran, Iran. Surly there is the penetration of decomposition products into seepage, during the fate of human corpses. This seepage contains bacteria, viruses and organic and inorganic chemical decomposition products. In this investigation, analyzing the data gathered about Beheshte Zahraha has been done; the...
Metro Traffic is an important component of urban public transport part. With large number of urban subway construction, subway tunnels surrounding groundwater, soil damage to the environment has become very prominent in subway construction problems. The changes in water and soil caused by subway construction will inevitably lead to changes in the environment surrounding the MTR changes in living environment...
Sewage irrigation is one of the methods to solve water shortage in north China Plain. The wastewater usually come from urban domestic and industrial sewage, inappropriate sewage irrigation can pollute soil and crops by heavy metal depositing. Thereby impact on health of humanbeing indirectly. This paper try to monitor the impact of heavy metal on wheat leaves by hyperspectral remote sensing. Results...
To investigate the characteristics of migration and distribution of phenanthrine plays an important role in the control of polynuclear aromatic hydrocarbons (PAHs) contamination. This experiment simulate the migration and distribution of phenanthrine in soil-groundwater by using indoor dynamic soil column test and hydrogeological theories so as to understand the condition and rules of phenanthrine...
In order to examine phenanthrine desorption of the phenanthrine in aeration zones and acquifer, soil from top soil layer, lower aeration zone and acquifer of the vertical profile of the four points in Zhangshi Irrigation area are taken as sample soil, phenanthrine as typical pollutant. The experiment is continuous batch adsorption-desorption experiment whose data are derived from linear models and...
Purification situation of different media to the corresponding polluted components in the downstream of Yitong River in Changchun is studied in this paper. The polluted water samples and different media which fit the dualistic structure of Yitong River are collected in the experiment. The soil columns are used in experiment to simulate the purification capability under nature conditions. According...
Increasing evidence suggests that nanoscale zero valent iron (nZVI) is one of best materials for the treatment of heavy metal ions in water. In this work, the reduction of Cr(VI) by nZVI was investigated. Laboratory experiments with varied Cr(VI) concentrations and nZVI doses were performed. Chromium removal efficiency decreases as the ratio [Cr(VI)]/nZVI increases due to the limited reaction sites...
The paper sets up a water quality and water quantity synthetically evaluation index system based on analytic hierarchy process, and then combine fuzzy cluster analysis to assessment evaluate the local groundwater environment comprehensively. The results showed that the method solved weight distribution problem better with such advantages as more reasonable and reliable conclusions, and estimated result...
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