[1]ZHANG Ting,FU Wa-li,YUAN Bo,et al.Effectiveness and Delayed Geochemical Hazard Analysis of Various Forms of Soil Zn Element in Water-level-fluctuating Zones in Xiaojiang Watershed of Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2011,18(06):79-83.
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Effectiveness and Delayed Geochemical Hazard Analysis of Various Forms of Soil Zn Element in Water-level-fluctuating Zones in Xiaojiang Watershed of Three Gorges Reservoir Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 06
Page number:
79-83
Column:
Public date:
2011-12-20
- Title:
- Effectiveness and Delayed Geochemical Hazard Analysis of Various Forms of Soil Zn Element in Water-level-fluctuating Zones in Xiaojiang Watershed of Three Gorges Reservoir Area
- Keywords:
- water-level-fluctuating zones in Xiaojiang watershed; soil; Zn element; delayed geochemical hazard
- CLC:
- S153.6+1;X53
- DOI:
- -
- Abstract:
- The total content and speciation, effectiveness of Zn element in the water-level-fluctuating zones in Xiaojiang Watershed of Three Gorges Reservoir Area had been analyzed. And a study on the delayed geochemical hazard character of Zn element in regional area soil had been carried out based on the delayed geochemical hazard mathematic model. The results shows: the average amount of total content of Zn element in the study area is 123.88 mg/kg, which is higher than primary state soil environment quality standards, and which is lower than the second state soil environment quality standards. The percentage of acid soluble state, recoverable state, oxidation state, and residual state in total amount is 2.93%, 4.42%, 8.71% and 83.94%, available form accounted for 4.51%. Through correlation analysis, acid-soluble state, reducible state and oxidable state were closely associated with the effective state. Reducible and oxidable contents contributed greatly to the available contents. Through analyzing measured data, it was found out that Zn element has delayed geochemical hazard character in soil in water-level-fluctuating zones in Xiaojiang watershed. Zn element form transform trends can be described as release of total content to release and transform of secondary morphology. The threshold of delayed geochemical hazard is 130.67 mg/kg. About 32% of soils have the possibility to outbreak as delayed geochemical hazard.
- References:
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