淮南市矿区部分蔬菜中铅污染现状评价

Evaluation of Lead Pollution in Vegetables in Huainan Coal-mining Area

淮南是一个开采历史达百年的煤炭城市,由于煤矿的开采,煤矸石在地表大量堆积,对矿区周围环境造成了不同程度的重金属污染。为研究矿区蔬菜中铅污染状况及安全水平,在不同开采历史矿区采集煤矸石堆附近耕地上的蔬菜样品,使用火焰原子吸收光谱法测定6种叶菜类蔬菜中铅的含量,并采用单项污染指数法对蔬菜铅污染状况进行评价。研究结果表明:淮南市矿区蔬菜已经受到煤矿开采活动的影响,蔬菜中的铅已经达到中度污染,个别蔬菜污染程度接近重污染。蔬菜中铅的含量随不同的蔬菜品种差异明显,并在区域上表现为废矿井区蔬菜中铅的含量高于老矿井区。

Huainan is a coal city with a mining history of hundreds of years. Heavy metals pollution aroused due to large amount of coal gangue accumulating in coal mine. In order to evaluate lead pollution and safety level of vegetables in the coal-mining area, the content of lead was determined in six leaf vegetables of coal-mining area by flame AAS. Vegetable quality was evaluated by means of single pollution index. Results showed that coal mining activities contribute greatly to lead pollution of the vegetable, with lead content at medium pollution level, some even close to heavy pollution level in coalmining area. Contents of lead in various vegetables are obviously different, with content of lead in the vegetables in abandoned coal-mining area higher than that of the vegetables in old coal-mining area.