Ndzana Charles Eloundou, Emmanuel Mvondo Valentin Yvan, Tchouta Kemgang Dongmo, Ngatcha Benjamin Ngounou
Ministry of Mines, Industry and Technological Development, Yaounde, Cameroon.
University of Ngaoundéré, Faculty of Science, Department of Earth Sciences, Ngaoundere, Cameroon.
Heliyon. 2023 Aug 1;9(8):e18786. doi: 10.1016/j.heliyon.2023.e18786. eCollection 2023 Aug.
The objective of the present study was to assess soil contamination by mercury and hydrocarbon products used in gold mining in the Kadey catchment area. The results obtained show that gold mining by the small mine is the cause of chemical contamination of the soil caused by hydrocarbon products with concentrations 800 times higher than the threshold value on certain points of the former mining sites. The use of mercury has led to an increase in its concentration to values that are still below the critical thresholds. It also appears from this work that organic matter plays a very important role in the retention of mercury on the soil surface. In the case of hydrocarbons are concerned, although high concentrations above are found exclusively at the surface, the rainfall contributes to their infiltration into the soil and to a horizontal redistribution of the contamination.
本研究的目的是评估卡迪集水区金矿开采中使用的汞和碳氢化合物产品对土壤的污染情况。所得结果表明，小型矿场的金矿开采是土壤受到碳氢化合物产品化学污染的原因，在以前采矿地点的某些点上，其浓度比阈值高出800倍。汞的使用导致其浓度增加，但其值仍低于临界阈值。这项工作还表明，有机质在土壤表面汞的保留中起着非常重要的作用。就碳氢化合物而言，虽然上述高浓度仅在地表发现，但降雨有助于它们渗入土壤并导致污染的水平重新分布。
