乌梁素海水体与沉积物中半挥发性有机物污染水平及风险评估

Distribution and risk assessment of semi-volatile organic compounds in water and sediment of Ulansuhai Nur

为研究乌梁素海水体与表层沉积物中半挥发性有机物(SVOCs)的污染特征和风险水平,对乌梁素海7个点位的水体和沉积物样品进行检测分析。结果表明:水体与沉积物中SVOCs的总浓度为449.7~691.0 ng/L及144.4~587.5μg/kg;多环芳烃(PAHs)和邻苯二甲酸酯(PAEs)是所有样品中发现的主要污染物;其他SVOCs未检测到或仅检测到微量。水体与沉积物中PAHs污染主要来自石油源及煤炭、生物质燃料燃烧混合来源;PAEs污染主要来自塑料和化工工业,以及生活垃圾;水体和沉积物中主要污染物的生态风险总体上呈低风险。从饮水和暴露接触的角度,乌梁素海呈现的健康风险水平较低。

In order to study the pollution characteristics and risk level of semi-volatile organic compounds(SVOCs)in water and surface sediments of Ulansuhai Nur,water and sediment samples from 7 sites were detected and analyzed.The total concentration of SVOCs in water and sedimentary species ranged from 449.7 to 691.0 ng/L and 144.4 to 587.5µg/kg,respectively.Polycyclic aromatic hydrocarbons(PAHs)and phthalate esters(PAEs)were the main contaminant compounds found in all samples.Other SVOCs were not detected or only trace.PAHs pollution in water and sediment mainly came from petroleum source and mixed source of coal and biomass fuel combustion.PAEs pollution mainly came from plastics and chemical industry and domestic wastes.The ecological risk of the main contaminants in water and sediment of Ulansuhai Nur was at a low level in general,and the health risk also presented a low level in terms of drinking water and exposure.