浑河流域大伙房水库消落带重金属污染特征研究

发布时间：2018-05-16 00:07

  本文选题：大伙房水库 + 重金属　； 参考：《辽宁大学》2015年硕士论文

【摘要】：水库的消落带是干湿交替的生态区域、生态研究中的敏感区,而大伙房水库是国家九大水源地之一,因此研究大伙房水库消落带的土壤、水体、大气中重金属含量及土壤中有机物的含量,对大伙房水库环境的治理具有重要意义。本论文通过对水库10个采样点采集的土壤、水体、空气样品中的重金属镉Cd、铅Pb、锌Zn、铜Cu、汞Hg、有效氮、有效碳、有效磷的含量的分析检测表明:在大伙房水库消落带附近水体中,重金属镉Cd、铅Pb、铜Cu、锌Zn、汞Hg含量较低,属于国家Ⅱ类水标准水质。大伙房水库消落带沉积物土壤中重金属镉Cd和铅Pb的含量高于辽河水系沉积值和辽宁土壤背景值,铜Cu、锌Zn、汞Hg低于辽河水系沉积值。大伙房水库消落带重金属富集程度依次是铅Pb、汞Hg、镉Cd、锌Zn、铜Cu。研究中涉及的不同深度的重金属没有明显趋势。大伙房水库大气汞对土壤汞富集的贡献明显。通过潜在生态危害指数评价法和地质积累指值分析,重金属铜Cu、锌Zn、汞Hg均属于轻微生态危害。重金属镉Cd对潜在生态危害指数的贡献较大。五种重金属的污染程度依次为镉Cd、铅Pb、锌Zn、铜Cu、汞Hg。大伙房水库的消落带重金属富集与土壤中有机质含量有趋势关系。通过调查发现,大伙房水库区域主要污染物来源为:工业、城镇生产生活、农业生产、旅游业和矿山开发,可通过提高选矿工艺和人们的环保意识等措施加以改善。
[Abstract]:The drop zone of the reservoir is the ecological area alternately dry-wet, and the sensitive area in ecological research, and the Dahuofang reservoir is one of the nine major water sources in the country. Therefore, the soil and water body of the falling zone of the Dahuofang Reservoir are studied. The contents of heavy metals in the atmosphere and organic matter in the soil are of great significance to the environmental control of Dahuofang Reservoir. In this paper, cadmium, Pb, Zn, Cu, Hg, available nitrogen, available carbon, cadmium, lead, Pb, Zn, Cu, Hg, available nitrogen, available carbon in soil, water and air were collected from 10 sampling sites of the reservoir. The analysis and detection of available phosphorus content showed that the contents of cadmium, Pb, Cu, Zn, Hg in the water near the falling zone of Dahuofang Reservoir were relatively low, belonging to the national class 鈪，

本文编号：1894547