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This study is supported by the agriculture geochemical survey project in Dakang town, Jiangyou city. By analyzing the heavy metals and organic pollutants contained in the surface soil, a assessment of soil quality is made in the study area by introducing single-index and comprehensive-index evaluation analysis, as well as by using GIS .The evaluation shows that nearly 1/3 areas of the land in the...
In this paper, a probe into the stabilization effects of ferrous sulfate (FeSO4) came from two aspects-stabilization efficiency and leachate content. Fe/As molar ratio, arsenic pollution intensity, soil pH, reacted time interval, competitive ions, such as sulfate(SO42-), phosphate(PO43-) and zinc ion(Zn2+), were studied in order to discuss their effects on the stabilization of arsenic. Results show...
The average level of indoor radon concentration for the residence in the uranium ore district is 282Bq/m3 and the maximum value can up to 570Bq/m3 which exceed the national top limited value (200Bq/m3). Indoor radon pollution of the residence is very serious. In order to find out the reason of radon pollution, the main environmental factors are investigated. Through the calculations of Gaussian atmospheric...
To attempt to understand the differences between rice genotypes in lead (Pb) tolerance, pot soil experiments were conducted with two rice genotypes at different soil Pb levels, i.e. 0 (the control), 800, 2000 mg kg-1. The results showed that the soil Pb concentration of 800 mg kg-1 is moderately toxic to rice, with 10%-30% decreases in plant biomasses. The soil Pb concentration of 2000 mg kg-1 is...
The objective of this study is, basing on the geochemical survey project of agriculture land, to assess the pollution levels of heavy metal in agriculture soil in Weicheng town, Mianyang city. The pollution assessments to soil heavy metals are performed by introducing SF (single factor) and CF (combined factors) pollution index analysis. The evaluation shows that there are obvious differences of heavy...
In this paper, flue-cured tobacco cultivar (Nicotiana tabacum L. K 326) was selected to explored responses of flue-cured tobacco plants to different concentration of lead (Pb) or cadmium (Cd). The plants were grown in nutrient solution in lab under the controlled condition. Research showed dry weights of each organ and whole plant and values of botany characters and Chlorophyll contents of upper leaf...
Soil contamination with polycyclic aromatic hydro-carbons (PAHs) is an increasing problem in China. An field survey was conducted in the industrial field and adjacent soils of Benxi Iron and Steel Group Corporation of Benxi, China to investigate the contents and distribution of the PAHs of soil, and a health risk assessment was carried out with total toxicity equivalence concentration (TTEC) of 15...
In this paper, the content and chemical speciation of a heavy metal element, Cd, were studied from 63 urban soil samples extracted from five different functional areas, Industrial Area, Commercial Area, Scenic Area, Agricultural Area, and Residential Area, of Qingdao. The analysis results indicated the Cd content in soil was 0.2211 - 3.040 mg/kg, with an average value of 1.289 mg/kg. The contamination...
The environmental impact of heavy metal pollution from mining activities is of growing concern. Here we have carried out an environmental geochemical investigation to determine the concentrations of heavy metals (Cd, Pb, Zn, and Cu) in soils in and around lead-zinc mining and zinc smelting areas in Northeastern China, analyze the characteristics of heavy metal contamination and assess pollution level...
Organic compounds are the important pollution compounds in landfill leachates. For determinating organic compounds in landfill leachates, a pretreatment method for the analysis of organic components is the important step. In this paper, the landfill leachates were extract with liquid-liquid extraction (LLE) and solid-phase microextraction (SPE), respectively. The effect of different extraction methods...
The research reveals the level and chemical forms of lead in soil of sewage irrigation area in Guangdong province, South China. Samples were collected from topsoil (0-10cm) and subsoil (30-40cm), and the total content and different fractions of lead were extracted by HNO3-HF-HClO4 and Tessier sequential extraction procedure, respectively. It is concluded that the soil of study area has been contaminated...
The effect of lanthanum and growth of Lolium perenne on the distribution of different forms of copper in copper tailings was studied by pot experiments. The results showed that, the growth of Lolium perenne on the soil significantly enhanced the copper contents of exchangeable, carbonate combined, Fe-Mn oxides combined and organic combined forms of copper compared to the control group which without...
This paper is a pilot study on the effect of grass- microorganism combined bioremediation of atrazine contaminated soil. Sorghum hybird sudangrass and ryegrass were selected as two repair grass, and immobilized degrading strain J2 was added into the soil under the indoor pot conditions. When the concentration of atrazine was 20 mg/kg in the soil, grass-microorganism combined bioremediation enjoyed...
Soil samples of 0-15cm from 9 sampling sites including different functional zones and different greening types of Shanghai, China were collected and analyzed. The results showed the average concentration of Cu, Pb, Zn and Cd in soil of shanghai were up to 42.33,169.58,49.06, and 0.2460mg/kg, respectively, which were much higher than their natural background values. Among the functional zones and the...
Restoration of petroleum-contaminated soil is one of the most important issues of environment protection all over the world. In order to study the influence of pollution concentration on biodegradation, a specific exogenous microbe, Phanerochaete chrysosporium, was employed for bioremediation of soil contaminated by different concentrations of petroleum. After 60d of treatment, the degradation rate...
A bacterial strain (AD4) capable of utiliaing atrazine as a sole nitrogen source for growth was isolated from industrial wastewater by enrichment culture. By Rep-PCR analysis revealed that strain AD4 was different with ADP and TC1, which are the model atrazine-degrading strain. The capable of removing atrazine of AD4 was greater than ADP and TC1. AD4 strain offered a great potential in the bioremediation...
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