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By analysis of the spatial distribution of heavy metals in surface soil in Fuzhou, we found the soil have been contaminated in different levels, especially for contents of Pb, Zn, Cr in all the sample points far exceeded Background value in soil of Fujian Province. Some pro-sulfur and pro-iron elements have similar properties, so their variation of contents show good correlation. The features of the...
The degree of contamination by heavy metals in soil and transfer to plants has been studied. Specimens of plant species from five locations were sampled with their corresponding soils. Thirty six plant species including two shallow water aquatic plants were identified. It was found that metal concentration in soil was highly variable while concentration of metals in plants directly depends on the...
In this paper, two kinds of fluorine-contaminate soils, fluvo-aquic soil and paddy soil, were cultivated by nitrogen fertilizer. Then, we studied the various fluorine species in the cultivated soil by sequential extraction method, and study the effect of main components in nitrogen fertilizer on pH of soils. After adding nitrogen fertilizer, the pH value of soil would increase, which consequently...
Heavy metal contamination of soil is of major concern from an ecological point of view. This study aims to characterize soil samples from different sites of two waste disposal grounds in Malaysia, to study heavy metal contamination in the landfill environment. The soil samples were obtained at different depths from 2m to 35m deep to find the possibility of heavy metal migration from the waste cell...
In order to study the purification ability of reed wetland soil to phenol, the dynamic soil column method and static degradation method was conducted, the results indicated that, wetland soil without reed-planted had a high purifying efficiency to phenol. Reed may affect purifying efficiency of wetland soil to phenol by changing soil infiltration and physicochemical properties of rhizosphere.
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...
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...
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 objective of this research was to determine the effect of Fe deficiency on the uptake of cadmium (Cd) by wheat (Triticum aestivum L.) in hydroponic culture. Results showed that Fe deficiency induced cadmium uptake, biomass decrease and changes of pH and Eh in hydroponic culture. Under Fe deficiency status, the decrease in pH and the increase in Eh might result in higher cadmium availability. Values...
Soils and dominant plants were surveyed in the Siding mineland area. Based on the determination of heavy metal concentration of soil from 8 sections and 14 dominant plant species in different parts, the potential ecological risk was assessed using the Hakanson Index Method. The results indicated that the soil of Siding mineland area was seriously contaminated by Pb and Zn. The risk index values of...
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...
Heavy metal accumulations in edible plants are commonly reported by scientist to alert the public on potential risks of toxicity effects. The study was conducted to determine the heavy metal accumulation in different part of the plant tissue namely Ipomoea reptans and Helianthus annuus. Spent batteries were utilized as the source of contamination with natural leaching process. Results indicated that...
Abstract- Column experiment simulations were carried out to determine potential metal ion migration in order to establish the environmental impact of a manganese mine wasteland and to understand the transport dynamics of heavy metal migration by way of two different soil types (tailings and tailings mud) within the Xiangtan Manganese Mine wasteland. Simulations were conducted at the Research Section...
The extensive clayization of Dexing copper mine is responsible for water and soil pollutions because of the oxidation of sulfide minerals. During the clayization, harmful elements such as As, S, Sb and Pb could be effectively released into the clay and water. Using the abundant spectral information of short wave infrared (SWIR), combining with the spectral absorbed index, SAM (Spectrum Angle Mapper)...
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