Jung Myung Chae, Thornton Iain, Chon Hyo-Taek
Department of Earth Resources and Environmental Geotechnics Engineering, Semyung University, Jecheon, Choongbuk, South Korea.
Sci Total Environ. 2002 Aug 5;295(1-3):81-9. doi: 10.1016/s0048-9697(02)00042-6.
The objective of this study is to investigate environmental contamination derived from metalliferous mining activities. In the study area, the Dalsung Cu-W mine, soils, various crop plants, stream waters, sediments and particulates were sampled in and around the mine and analyzed for As, Sb and Bi by ICP-AES with a hydride generator. In addition, soil pH, cation exchange capacity, loss-on-ignition and soil texture were also measured. Concentrations of As, Sb and Bi in surface soils sampled in the mine dump sites averaged 2500, 54 and 436 microg g(-1), respectively. Relatively lower concentrations, however, were found in soils from alluvial and high land sites and household garden sites. Arsenic, Sb and Bi contents in plant samples varied depending upon their species and parts, with higher concentrations in spring onions, soybean leaves and perilla leaves and lower levels in red peppers, corn grains and jujube grains. These results confirm that elemental concentrations in plant leaves are much higher than those in plant grain. Elevated levels of As, Sb and Bi were also found in stream sediments sampled in the vicinity of the mine and decreased with distance from the mine. Concentrations in stream water samples ranged from 0.8 to 19.1 microg As l(-1) and from 0.3 to 8.4 microg Bi l(-1); all the samples contained less than 1.0 microg Sb l(-1). Because of very low particulate loading at the time of sampling, the metal contents in particulates were very low (< 8.2 microg As l(-1), < 0.22 microg Sb l(-1) and 2.8 microg Bi l(-1). This may be mainly due to the low solubility of those elements under moderately acidic and oxidizing conditions of the mining area.
本研究的目的是调查金属矿开采活动造成的环境污染。在研究区域的达尔斯ung铜钨矿，对矿区及其周边的土壤、各种农作物、溪水、沉积物和颗粒物进行了采样，并采用带有氢化物发生器的电感耦合等离子体发射光谱仪（ICP - AES）分析了其中的砷、锑和铋。此外，还测量了土壤的pH值、阳离子交换容量、烧失量和土壤质地。在矿渣堆采样点采集的表层土壤中，砷、锑和铋的浓度平均分别为2500、54和436微克/克。然而，在冲积土、高地土壤和家庭花园土壤中发现的浓度相对较低。植物样品中的砷、锑和铋含量因物种和部位而异，葱、大豆叶和紫苏叶中的浓度较高，而红辣椒、玉米粒和枣粒中的含量较低。这些结果证实，植物叶片中的元素浓度远高于植物籽粒中的浓度。在矿区附近采集的溪流沉积物中也发现砷、锑和铋的含量升高，且随着与矿区距离的增加而降低。溪流水样中的浓度范围为0.8至19.1微克砷/升和0.3至8.4微克铋/升；所有样品中的锑含量均低于1.0微克/升。由于采样时颗粒物负载量极低，颗粒物中的金属含量非常低（<8.2微克砷/升，<0.22微克锑/升和2.8微克铋/升）。这可能主要是由于这些元素在矿区中等酸性和氧化条件下的溶解度较低。
