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Aiming at the fact that the hydrochemistry environment of shallow groundwater becomes worse and worse in the past ten years in LuoYang. On the basis of large amounts of test and observation datum, the paper analyze the cause form the lithology of aquifer, the recharge, discharge of groundwater and human engineer activity and make the following conclusion: the purification capacity on many contaminations...
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...
Two strains named W7 and W16 were isolated by liquid enrichment culture from the corn field where atrazine has been chronically applied. Observed by gram stain and SEM, W7 belonged to gram-positive bacteria and the single cell was short bacilliform; W16 belonged to gram-negative bacteria and the single cell was spherical. Through physiological and identification and 16SrDNA sequence analysis, two...
Organochlorine pesticides were detected and analyzed in surface water, bottom water and porewater from Honghu Lake, middle of China. The concentrations of total HCHs in surface water and bottom water were 3.52-5.68 ng/L and 3.77-6.86 ng/L respectively, and the concentrations of total DDTs were 0.39-2.38 ng/L and 0.91-6.05 ng/L respectively. Compared with the water quality of other regions, the concentrations...
Based on manganese content surpass the set standard seasonally in Jilihe reservoir's water, manganese content in the catchment basin of the river water, river sediment and the surrounding soil were analyzed, the environmental geochemical factors which impact manganese content were studied. According to the survey results, the reservoir water quality has obvious stratification: Dissolution of manganese...
Nowadays, endocrine disruptor compounds in the water system have become a concern due to the risk of contamination to wild life and humans even at the nanogram level. Excess estrogens and androgens are a major contributor group of endocrine compounds. Statistical surveys have shown that dairy farms contribute to over 90% of the total estrogens in the UK and US. An analytical system is being developed...
Yunfu pyrite deposit bearing thallium (Tl) with proven reserves of three million tons' Tl in Guangdong Province, China has been extensively exploited since 1970. This study investigated contamination levels of Tl and other trace metals in ecosystem such as soils, surface waters, vegetables and crops in the area near the deposit. Results show that Tl in these samples nearby has greatly enriched and...
Leachate from gangue is known as the main pollutants source to mining area soil and groundwater pollution. Long term leaching experiment are carried out to seek the long term effect on leachate chemistry of gangue under long term exposure to rainfall and atmosphere. Gangue from Xishan coal mine is used for long term dynamic leachate to analyze and compare the changes of the various metal ions in leachate...
Based on the acid rain data measured at Shapingba weather station in Chongqing from 1993 to 2007 and the emission data of SO2 in Chongqing, Guizhou and Sichuan, the acid rain change trend and its relationship with SO2 emission were analyzed. The results indicated that in the past 15 years, the change trend of the pH value of the precipitation in Chongqing changed between 3.8 and 4.5. The annual variation...
Endocrine Disruptors, which is trace but more and more noted in aquatic environment, has a significant effect on people's hormone systems. The estradiol (E2) was a research object, and the effects of solution parameters (concentration, pH, ionic strength and natural organic matter (NOM) ) on the retention of trace E2 by nanofiltration membrane (NF) (BDXN-90 polyamind aromatic compound membrane) filtration...
Since humic acid from water causes considerable serious health-risk factors, powerful methods for the removal of those have received increasing attention over the past decade. In this paper, the available technologies for removal of humic acid from water are briefly reviewed, and the recent advancements are summarized. Fundamentals and main applications of typical methods such as filtration, flocculation...
Oxidation ponds are widely used for wastewater treatment in developing countries because of the relative simplicity and low operating costs. Thanks to the permeability of the soil layer at the bottom of ponds, contaminants can go into groundwater from wastewater during its residence period. In this study, about 14 shallow groundwater samples were collected from pumping wells around an oxidation pond...
Groundwater vulnerability is basement of evaluating risk of groundwater contamination and groundwater vulnerability assessment is one of management methods for preserving the quality of groundwater. Based on DRASTIC model and GIS techniques, shallow groundwater vulnerability assessment was carried out in Xiangcheng City, China. The results indicate that the studied area can be divided into three zone:...
Trichloroethene (TCE), usually in the form of dense non-aqueous phase liquid (DNAPL), is a widely used degreasing ingredient causing profound soil and groundwater contamination. While bio-enhanced dechlorination of TCE to harmless Ethene is a promising technique for waste water treatment, the mechanism and related phenomenon have not been thoroughly understood, especially in groundwater. A comprehensive...
Soil slurry reactor technology is one of the effective methods for treating PAHs contaminated soil. In this paper, removal of high molecular weight PAHs, Indeno (1,2,3-cd) pyrene (Inp), was studied in soil slurry reactors with isolated bacteria from PAHs contaminated soil. The factors affecting Inp biodegradation and the optimal conditions were investigated using orthogonal experimental design (L9(34))...
Ammonia addition and pH depression can inhibit the formation of bromate in ozonated drinking water by reacting with free bromine (HOBr/OBr-), an intermediate in bromate formation, to form bromamines and other bromoorganic disinfection byproducts. This study was performed to assess the effects of ammonia and pH value combinations on the formation of bromate and THMs during ozonation and chlorination...
A novel method extracting with ether, deriving by methanol, deteminating with gas chromatography-mass spectrometry (GC-MS) for analyzing 8 kinds of acid herbicide residues in water has been established. The optimum experimental conditions were as follows: Adding 8 drops of concentrated sulfuric acid; adding 1.0 mL methanol; deriving 60.0 min. Linear of all herbicides is good in the range of 0.05 to...
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...
It applies hydrodynamic Model to simulate COD of sewage around Xiaoyangkou, Rudong City, Jiangsu Province in this paper. Curvilinear orthogonal grid is used in interesting area, and hydrodynamics and water quality model are used to the current velocity field and tidal level field both on case of the spring and the neap tide. The computational results are compared with measured field data around drain...
Contamination of the shallow aquifer by elevated nitrate concentrations is a common problem in many rural regions of the world. An aquifer that has both aquifer intrinsic vulnerability and irrigated land uses is especially susceptible to this type of contamination. A study was carried out to evaluate an aquifer's intrinsic vulnerability and agricultural activity's impact on groundwater quality in...
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