潘家口水库水体中有机物分布特征及变化趋势分析

Analysis of Distribution Characteristics and Variation Trends of Organic Matters in Panjiakou Reservoir

为了解潘家口水库网箱清理活动对水环境改善具体情况,摸清潘家口水库现存主要污染物种类及特征,针对研究区域不同时间和空间表层水体样品开展了分析研究。利用全二维气相色谱飞行时间质谱联用的高通量筛查技术方法,对潘家口水库2017、2018年水体样品进行检测,检测结果经匹配度、检出率等条件进一步筛选确认,对确认结果进行化合物属性及用途分类,将最终结果用于污染物种类变化趋势分析。与2017年结果相比,2018年减少化合物244种(包括38种酮类、27种烷烃类、26种酚类、21种酯类和15种有机酸类化合物及其他),其中包含用于工业中间体的25种化合物,用于香料香精的14种化合物,用于食品添加剂的12种化合物,用于工业生产的8种化合物,用于医药的6种化合物以及用于增塑剂的14种化合物等。与2017年结果相比,2018年增加化合物22种(包括10种酯类、3种酮类、2种醚类、1种苯类、1种醇类、1种醛类、1种有机酸类化合物及其他),其中包括用于香料香精的5种化合物,用于增塑剂的4种化合物,用于中间体的2种化合物以及用于阻燃剂的1种化合物等。研究结果表明该区域水体中有机化合物数量在2017年后大幅减少,可能由该区域开展的养殖网箱清理活动导致。

In order to understand the improvement of water environment by cage-cleanup-activities in Panjiakou Reservoir,and to find out the types and characteristics of main pollutants in Panjiakou Reservoir,this paper carries out analysis and research on surface water samples in different time and space in the study area.The water samples of Panjiakou Reservoir in 2017 and 2018 are tested by the high-throughput screening technology of full two-dimensional gas chromatography time-of-flight mass spectrometry.The results are further confirmed by the matching degrees,detection rates and other conditions.The confirmed results are classified according to the chemical properties and purposes,and the final results are used to analyze the trend of pollutant species change.Compared with the test results in 2017,there were 244 compounds reduced in 2018,including 38 ketones,27 alkanes,26 phenols,21 ethers,15 organic acids,etc.Among them,25 for industrial intermediates,14 for flavors and fragrances,12 for food additives,8 for industrial use,6 for pharmaceutical products,14 for plasticizers,and so on.Compared with the results in 2017,there were 22 compounds increased in 2018,including 10 esters,3 ketones,2 ethers,1 benzene,1 alcohol,1 aldehyde,1 organic acid,etc.,among which 5 for flavors and fragrances,4 for plasticizers,2 for intermediates,and 1 for flame retardants,etc.The research indicates that a large number of organic pollutants decreased in the study area from 2017 to 2018,because of the cage-cleanup-activities in this reservoir.