Laboratory of Soil Chemistry, Department of Soils, UFRRJ, BR 465 km 7, Seropédica, Brazil.
Bull Environ Contam Toxicol. 2012 Oct;89(4):775-81. doi: 10.1007/s00128-012-0790-9. Epub 2012 Aug 18.
Studies on heavy metal contamination in soils used for ammunition disposal and destruction are still emerging. The present study aimed to evaluate the contamination level and spatial distribution of lead in disposal and destruction areas. This site was used for ammunition disposal and destruction activities for 20 years. The ammunition destruction site (1,296 ha), a sampling system that followed a sampling grid (5 m × 5 m) with 30 points was adopted and samples were collected at the following five depths with a total of 150 samples. During the collection procedure, each sampling grid point was georeferenced using a topographic global positioning system. Data were validated through semivariogram and kriging models using Geostat software. The results demonstrated that the average lead value was 163 mg kg(-1), which was close to the investigation limit and the contamination levels were higher downstream than upstream. The results showed that there was lead contamination at the destruction site and that the contamination existed mainly at the surface layer depth. However, high lead concentrations were also found at deeper soil depths in the destruction area due to frequent detonations. According to the planimetry data, the areas that require intervention significantly decreased with increasing depths in the following order: 582.7 m(2) in the 0-20 cm layer; 194.6 m(2) in the 20-40 cm layer; 101.6 m(2) in the 40-60 cm layer; and 45.3 m(2) in the 60-80 cm layer.
用于弹药处置和销毁的土壤中的重金属污染研究仍在不断涌现。本研究旨在评估处置区和销毁区的铅污染水平和空间分布。该场地曾用于弹药处置和销毁活动 20 年。采用了一种跟随采样网格（5 m×5 m）的采样系统，设有 30 个采样点，并在以下五个深度采集样本，共采集 150 个样本。在采集过程中，使用地形全球定位系统对每个采样网格点进行地理参考。使用 Geostat 软件通过半变异和克立格模型验证数据。结果表明，平均铅含量为 163 mg kg(-1)，接近调查极限，下游污染水平高于上游。结果表明，销毁点存在铅污染，污染主要存在于表层深度。然而，由于频繁的爆炸，在销毁区较深的土壤深度也发现了高浓度的铅。根据平面图数据，需要干预的区域随着深度的增加而显著减少，以下顺序为：0-20 cm 层的 582.7 m(2)；20-40 cm 层的 194.6 m(2)；40-60 cm 层的 101.6 m(2)；60-80 cm 层的 45.3 m(2)。
