文章摘要
张婷,傅瓦利,袁波,王晓阳,蓝家程,彭景涛.三峡库区小江流域消落带土壤Zn各形态有效性及缓变型地球化学灾害分析[J].水土保持研究,2011,(6):
三峡库区小江流域消落带土壤Zn各形态有效性及缓变型地球化学灾害分析
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
  
DOI:
中文关键词: 小江流域消落带  土壤  Zn元素  缓变型地球化学灾害  
英文关键词: water-level-fluctuating zones in Xiaojiang watershed  soil  Zn element  delayed geochemical hazard  
基金项目:重庆市移民局课题(200909)
作者单位
张婷,傅瓦利,袁波,王晓阳,蓝家程,彭景涛 西南大学地理科学学院
 
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中文摘要:
      通过分析三峡库区小江流域消落带土壤Zn全量、形态及有效性,并基于缓变型地球化学灾害数学模型,研究了区域内土壤Zn的缓变型地球化学灾害特征。结果表明:研究区域内全量Zn的平均值为123.88mg/kg,高于国家土壤环境质量一级标准,但明显低于二级标准。Zn的酸溶态、可还原态、可氧化态、残渣态平均值占全量平均值的百分比分别为2.93%、4.42%、8.71%和83.94%,有效态占4.51%。酸溶态、可还原态、可氧化态与有效态相关性密切;可还原态和可氧化态含量对有效态含量贡献较大。在小江流域消落带的土壤中Zn具有缓变型地球化学灾害特征,土壤中Zn有可释放总量向次生相态释放转化的趋势,其缓变型地球化学灾害临界值为130.67mg/kg,32%的土壤样品具有爆发Zn缓变型地球化学灾害的可能性。
英文摘要:
      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...
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