ABSTRACT

This study determined the contamination levels of some heavy metals: Mn, Cr, Cu, Ni, Fe, As, and Al obtained from the delta basin of Omaruru River, using Inductively Coupled Plasma-Optical Emission Spectrophotometer (Optima 8000, Perkin Elmer). Chemical analysis showed that the sediments samples have metal concentrations ranging from 88 to 128mg/kg for Mn, 3973 to 4369mg/kg for Fe, 96 to 107mg/kg for Cr, 6 to 9mg/kg for Cu, 9 to 11mg/kg for Ni, 17 to 19mg/kg for As, and 11750 to 9002mg/kg for Al. The concentrations of Cr and As showed suggest that the sediment samples were heavily polluted according to United States Environmental Protection Agency's regulatory guidelines of the heavy metals. Additionally, the concentrations of Cr and As in the sediments exceeded the effect low range, effect medium range, threshold effect level, and the probable effect level proposed by the Canadian Council of Ministers of the Environment.

摘要

这项研究使用电感耦合等离子体发射分光光度计（Optima 8000，Perkin Elmer）测定了从奥马鲁鲁河三角洲盆地获得的一些重金属：锰，铬，铜，镍，铁，砷和铝的污染水平。化学分析表明，沉积物样品的金属浓度范围为：锰88-128mg / kg，铁3973-4369mg / kg，铬96-107mg / kg，铜6-9mg / kg，铬9-11mg / kg。 Ni：As为17至19mg / kg，Al为11750至9002mg / kg。显示的Cr和As浓度表明，根据美国环境保护局的重金属监管指南，沉积物样品受到了严重污染。此外，沉积物中Cr和As的浓度超过了影响低范围，影响中等范围，阈值影响水平，