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目的分析深圳市梧桐山地区天然泉眼山泉水中邻苯二甲酸酯类物质(PAEs)的污染状况,研究其含量变化的规律性和饮用时的健康安全风险。方法 2011年-2014年从梧桐山典型泉眼采集山泉水,用固相萃取富集、气相色谱-质谱法测定山泉水中的PAEs含量,并统计研究其污染特征。结果各山泉水中PAEs污染的极大值为0.162μg/L~34.700μg/L,超标率为11.3%,主要的污染种类是邻苯二甲酸二甲酯、邻苯二甲酸二异丁酯、邻苯二甲酸二丁酯和邻苯二甲酸二(2-乙基己基)酯,泉水中PAEs的污染水平及变化程度大于末梢水,冬季污染比春季、夏季要高。结论深圳市梧桐山泉水中PAEs的总体污染水平在国家标准限量的安全范围内,但水平变化较大并易受环境影响而超标,比饮用末梢水的健康安全风险值要高。
Objective To analyze the pollution status of phthalate esters (PAEs) in spring water of natural spring in Wutongshan area, Shenzhen, and to study the regularity of its content changes and health and safety risks when drinking. Methods Mountain spring water was collected from the typical spring of Wutong Mountain from 2011 to 2014. The PAEs in mountain spring water were determined by solid-phase extraction and gas chromatography-mass spectrometry. The pollution characteristics were also studied statistically. Results The maximum values of PAEs in mountain spring water ranged from 0.162μg / L to 34.700μg / L, and the over-standard rate was 11.3%. The main pollutants were dimethyl phthalate, diisobutyl phthalate, Dibutyl phthalate and di (2-ethylhexyl) phthalate, the pollution level and degree of PAEs in spring water are higher than that of the peripheral water, and the pollution in winter is higher than that in spring and summer. Conclusion The overall pollution level of PAEs in Wutongshan Spring in Shenzhen City is within the safety limits of the national standard limit, but its level varies greatly and is easily exceeded by the environment, which is higher than that of drinking water.