• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Environmental Science and Technology >CONTAMINATION OF RIVERSIDE SEDIMENTS AND SOIL IN THE ALLUVIUM OF NITRA RIVER BY CADMIUM, MERCURY AND LEAD AS A RESULT OF PREVIOUS INTENSE INDUSTRIAL ACTIVITY
【24h】

CONTAMINATION OF RIVERSIDE SEDIMENTS AND SOIL IN THE ALLUVIUM OF NITRA RIVER BY CADMIUM, MERCURY AND LEAD AS A RESULT OF PREVIOUS INTENSE INDUSTRIAL ACTIVITY

机译：镉，汞和领先镉河河河畔河畔沉积物与土壤污染，汞基铅，以前的产业活动

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Nitra river belongs to the most contaminated rivers in the Slovakia due the previous intensive industrial activity of several enterprises located in its neighborhood. The aim of the study was to estimate the risk of contamination of riverside sediments as well as alluvial soil in vicinity of Nitra river by dangerous heavy metals. Pseudototal content of risk metals (Pb and Cd) including all the forms besides residual metal fraction was assessed in soil extract by aqua regia and content of mobile forms of selected heavy metals in soil extract by NH_4NO_3 (c=1mol/L). Used analytical method was flame AAS (AAs Varian AA Spectr DUO 240 FS/2402/UltrAA). The Hg content was determined using AMA 254 Advanced Mercury Analyzer. Gained results were evaluated according Law No. 220/2004 (valid in the Slovak Republic).The samples of riverside sediments were collected from 28 exactly defined sample points along the Nitra river. The Pollution load index (PLI) has been increasing downstream of Nitra river due to contamination by Cd and Hg. The determined values of total Cd and Hg contents in riverside sediments were in interval 0.74 - 1.88 mg/kg and 0.06 - 5.44 mg/kg, respectively. With exception of two sample points the hygienic limits (0.4 mg Cd/kg and 0.15 mg Hg/kg) were exceeded in all sediment samples. Based on the recommendations of local residents three localities (Male Krstenany, Vycapy-Opatovce and Cernik) along the river Nitra were selected for the research with the requirement that examined site was located in the flood territory and was flooded during the year. In each of the localities the sample points using GPS were assessed. In all studied localities the soil content of mobile Pb forms determined in extract of NH_4NO_3 (c=1mol/L) was higher than the limit value (0.1 mg/kg) given by the legislation. The intervals were 0.10 - 0.24, 0.17 - 0.32 and 0.11 - 0.25 mg Pb/kg of soil in Male Krstenany, Vycapy-Opatovce and Cernik, respectively. The values of total Cd content determined in soil extracts by aqua regia were in intervals 0.25 - 0.95, 2.04 - 2.52 and 0.63 - 1.35 and total content of Hg in intervals 0.06 - 1.6, 0.04 - 0.07 and 0.03 - 0.36 mg/kg respectively. The hygienic limits given by the legislation are 0.7 mg Cd/kg and 0.5 mg Hg/kg of soil. It means that cadmium and mercury are the most dangerous metals present in the enhanced amounts in soil of investigated localities. The isoline maps were created for each of determined heavy metal in each locality. The obtained results confirmed the risk of alluvial soils as well as riverside sediment contamination by the Nitra river.
机译：尼特拉河属于在斯洛伐克污染最严重的河流，由于位于其附近的几家企业的前面密集的工业活动。这项研究的目的是评估河边沉积物污染的危险由重金属的风险，以及在尼特拉河附近的冲积土。风险金属（铅和镉），包括除了残余金属组分的所有形式的Pseudototal含量通过王水和土壤中提取选定的重金属的移动形式含量NH_4NO_3（C = 1mol / L的）在土壤提取评估。使用的分析方法是火焰AAS（AAS瓦里安AA SPECTR DUO 240个FS / 2402 / UltrAA）。采用AMA 254先进的测汞仪测定汞含量。根据二千○四分之二百二号法（在斯洛伐克有效）河边沉积物.The样品从28个精确限定沿着河流尼特拉样本点收集得到的结果进行了评价。的污染负荷指数（PLI）已经由于镉，汞污染增加尼特拉河流的下游。在河边沉积物总Cd和Hg内容所确定的值在区间0.74 - 1.88毫克/千克和0.06 - 5.44分别毫克/千克。随着两个样本点例外卫生限值（0.4毫克镉/ kg和0.15毫克汞/ kg）的所有沉积物样品中超过。根据当地居民的建议，选择了三个地方（男Krstenany，Vycapy-Opatovce和Cernik）沿河尼特拉与该检查部位是位于洪水领土，在这一年被水淹没需求的研究。在每个地点的使用GPS的采样点进行了评估。在所有研究的地点的移动铅形式土壤含量NH_4NO_3（C = 1mol / L的）的提取物来测定被不是由立法给出的限制值（0.1毫克/千克）更高。分别为0.25毫克铅/ kg的土壤中男Krstenany，Vycapy-Opatovce和Cernik的， - 所述间隔分别为0.10 - 0.24，0.17 - 0.32和0.11。分别0.36毫克/公斤 - 总Cd含量的值在土壤提取物测定通过王水是在间隔0.25 - 0.95，2.04 - 2.52和0.63 - 1.35和在间隔0.06汞柱的总含量 - 1.6，0.04 - 0.07和0.03。通过立法给出的卫生限值​​是0.7毫克镉/千克和0.5mg汞/ kg的土壤。这意味着，镉和汞是最危险的金属存在于研究地点的土壤强化量。在等值线图对每个在每个地方确定重金属的创建。得到的结果证实了冲积土壤由尼特拉河的风险以及江边的泥沙污染。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号