Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, via Bologna 148, 10154 Torino, Italy.
Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, via Bologna 148, 10154 Torino, Italy.
Sci Total Environ. 2016 Oct 15;568:679-684. doi: 10.1016/j.scitotenv.2016.02.167. Epub 2016 Mar 5.
The concentrations of 14 essential and nonessential trace elements were determined in fish from Lake Tshangalele, Katanga province, Democratic Republic of Congo. This province has been a place of intensive mining activities for centuries, which have increased in recent years, due to the use of metals such as copper and cobalt for the industries of fast-growing countries. Lake Tshangalele, which receives effluents from metallurgical and mining plants in Likasi, is home to several fish species that are an important part of the diet of the local population, and, therefore, it constitutes a relevant site for documenting the human exposure to metals as a result of a fish diet. The highest concentrations (median levels, dry weight) of cobalt (7.25mgkg(-1)), copper (88.1mgkg(-1)), iron (197.5mgkg(-1)), manganese (65.35mgkg(-1)), zinc (122.9mgkg(-1)) and aluminum (135.4mgkg(-1)) were found in fish collected closest to the copper mining plant, with decreasing concentrations along the lake, up to the dam. In the most contaminated fish samples, values of up to 270.1mgkg(-1) for Al, 173.1mgkg(-1) for Cu, 220.9mgkg(-1) for Zn, 211.0mgkg(-1) for Mn, 324.2mgkg(-1) for Fe, 15.1mgkg(-1) for Co, 4.2mgkg(-1) for Cr, 1.6mgkg(-1) for Cd, 1.9mgkg(-1) for Pb, and 1.8mgkg(-1) for Ni were found. Metal contamination from mining activity resulted in being of great concern because of potential health risks to the local inhabitants due to the consumption of heavily contaminated fish.
High levels of metals, especially cobalt, aluminum, iron, manganese, zinc and cadmium were found in fish from Tshangalele water system.
本研究测定了来自刚果民主共和国加丹加省坦噶莱莱湖的鱼类中 14 种必需和非必需微量元素的浓度。几个世纪以来，该省一直是密集采矿活动的场所，近年来由于快速增长国家的工业对铜和钴等金属的需求增加，采矿活动有所增加。坦噶莱莱湖接纳了来自利卡西冶金和采矿工厂的废水，是多种鱼类的家园，这些鱼类是当地居民饮食的重要组成部分，因此是记录由于鱼类饮食导致人类暴露于金属的相关地点。在离铜矿最近的鱼类样本中发现了钴（7.25mgkg(-1)）、铜（88.1mgkg(-1)）、铁（197.5mgkg(-1)）、锰（65.35mgkg(-1)）、锌（122.9mgkg(-1)）和铝（135.4mgkg(-1)）的最高浓度（中位数，干重），随着距离的增加，在沿湖地区直至大坝，浓度逐渐降低。在污染最严重的鱼类样本中，铝的含量高达 270.1mgkg(-1)，铜为 173.1mgkg(-1)，锌为 211.0mgkg(-1)，锰为 211.0mgkg(-1)，铁为 211.0mgkg(-1)，钴为 15.1mgkg(-1)，铬为 4.2mgkg(-1)，镉为 1.6mgkg(-1)，铅为 1.9mgkg(-1)，镍为 1.8mgkg(-1)。由于当地居民食用受严重污染的鱼类，采矿活动造成的金属污染令人非常担忧，因为这可能会对当地居民的健康造成威胁。
坦噶莱莱水系鱼类的金属含量（尤其是钴、铝、铁、锰、锌和镉）较高。
