Heavy metal contamination of the soils used for stocking raw materials in the former ILVA iron-steel industrial plant of Bagnoli (southern Italy)
Heavy metal contamination of the soils used for stocking raw materials in the former ILVA iron-steel industrial plant of Bagnoli (southern Italy)
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DOI：
10.1016/s0048-9697(02)00020-7
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发表时间：
2002-08-05
影响因子：
9.8
通讯作者：
Violante, P
中科院分区：
文献类型：
--
作者：
Adamo, P;Arienzo, M;Violante, P
用物理和化学方法研究了一个土壤剖面层中金属Fe、Al、Cu、Co、Cr、Pb、Zn、Ni和Mn的总含量和化学矿物形式，该剖面代表了一个专门用于储存Bagnoli（那不勒斯）ILVA钢铁工业厂拆除后的原材料的区域。研究区的地质背景是在Phlegrean领域，一组多成因火山那不勒斯西部，这给了产生母土材料的火山活动的结果。土壤形态似乎受到工业过程中使用的材料的发生和分层的强烈干扰。细沉积物沿剖面向下沉积，导致出现粉砂和粘土涂层。整个土壤样品中，尤其是表层，Cu、Co、Cr、Pb、Zn、Ni的总含量均高于规定水平（Cu 120，Co 20，Cr 150，Pb 100，Zn 150，Ni 120 mg kg（-1）），意大利环境部针对公共、私人和住宅区土壤规定，（铜600，钴250，铬800，铅1000，锌1500，镍500毫克公斤（-1））概述了工业和商业区的土壤和底土（Gazzetta Ufficiale della Escherblica Italiana，1999年）。重金属的形态和不同的化学池中< 2毫米的部分确定存在大量的元素被困在矿物结构的氧化物和硅酸盐和容易还原的锰或铁的氧化物中。一个恒定的量的铜与有机化合物。在稀释的乙酸溶液中提取了大量的Zn（> 20%），表明该元素以更容易和潜在可用的形式存在。在粘土部分（
The total contents and the chemical and mineralogical forms of the metals Fe, Al, Cu, Co, Cr, Pb, Zn, Ni and Mn in the horizons of a soil profile, representative of an area devoted to stocking raw materials in the dismantled iron-steel industrial plant of ILVA of Bagnoli (Naples), were studied by physical and chemical methods. The geological setting of the study area is the result of volcanic activity in the Phlegrean Fields, a group of polygenic volcanoes to the west of Naples, which give rise to the parent soil material. Soil morphology appeared to be strongly disturbed by the occurrence and stratification of materials used in the industrial process. Fine sediments illuviation down the profile resulted in the occurrence of silt and clay coatings. The total contents of Cu, Co, Cr, Pb, Zn and Ni, in the whole soil samples, especially in the surface layers, were above the regulatory levels (Cu 120, Co 20, Cr 150, Pb 100, Zn 150, Ni 120 mg kg(-1)) stated by the Italian Ministry of Environment for soils in public, private and residential areas, and below the levels (Cu 600, Co 250, Cr 800, Pb 1000, Zn 1500, Ni 500 mg kg(-1)) outlined for soils and subsoils of industrial and commercial areas (Gazzetta Ufficiale della Repubblica Italiana, 1999). Speciation of heavy metals and the determination of the different chemical pools in the fraction < 2 mm identified the large presence of elements trapped in the mineralogical structure of oxides and silicates and occluded in easily reducible manganese or iron oxides. A constant amount of Cu was associated with organic compounds. A significant amount of Zn (> 20%) was extracted in diluted acetic acid solution, indicating that the element was present in a more readily and potentially available form. In the clay fraction (