钢铁工业区降尘对周边土壤的影响
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*国家自然科学基金重点项目(40235054);中国科学院知识创新工程重点方向性项目(KZCX3-SW-427)资助


EFFECTS OF ATMOSPHERIC DUST ON SOILS IN INDUSTRIAL ZONES
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    摘要:

    分别在南京的两个钢铁厂收集降尘并采集周边表土,并用ICP-AES和磁化率仪分析得到16种元素含量和表土、地面尘的磁化率.结果表明,两个钢铁工业区的大气降尘的年沉降通量分别为190tkm-2a-1和407tkm-2a-1,这可能会影响着周边地区土壤的形成;Al、K、Na、Ti、V在降尘中的含量显著低于表土,而Ca,Fe,Zn,Mn,Pb,Cu在降尘中含量要显著高于表土;表土的磁化率除水田外均大于100×10-8m3kg-1,并且地面尘的磁化率要远远高于表土的磁化率.研究表明,钢铁工业区降尘对其周边土壤中污染元素的积累有明显影响,突出地表现在土壤表层重金属含量升高,而磁化率可以很好地表征这种表聚的特点.

    Abstract:

    Samples of airborne dust and soils around the two steel factories in Nanjing were collected and their element concentrations were analyzed by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) and their magnetic susceptibility determined by magnetic susceptibility analyzer.Results indicate that the deposition flux around the two steel factories was 190 t km-2a-1 and 407 t km-2a-1,respectively and the annual accumulation in soil surface due to dust deposition could reach up to 0.3 mm,which is an important contribution to soil formation in a long run.The contents of Al,K,Na,Ti,and V in the dust were lower than that in the surface soils,but Ca,Fe,Zn,Mn,Pb and Cu were much higher.The magnetic susceptibility (MS) of the surface soils was over 100×10-8m3kg-1 except that in the paddy field,and the MS of the roof dust was much higher than that of the surface soils.MS decreased sharply with depth in the several centimeters of soils around the factories,indicating an obvious surface enrichment of magnetic materials and heavy metals.The study reveals that the dust from industrial sources has a strong impact on the soils around,by causing enrichment of heavy metals in the soil surface and sharp rise in magnetic susceptibility.

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倪刘建,张甘霖,杨金玲,阮心玲,赵文君,赵玉国,周立祥.钢铁工业区降尘对周边土壤的影响[J].土壤学报,2007,44(4):637-642. DOI:10.11766/trxb200604130408 Ni Liujian, Zhang Ganlin, Yang Jinling, Ruan Xinling, Zhao Wenjun, Zhao Yuguo, Zhou Lixiang. EFFECTS OF ATMOSPHERIC DUST ON SOILS IN INDUSTRIAL ZONES[J]. Acta Pedologica Sinica,2007,44(4):637-642.

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  • 收稿日期:2006-04-13
  • 最后修改日期:2006-09-11
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  • 在线发布日期: 2013-02-25
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