摘要
[目的]研究广州市及其周边城市中小型水库和湖泊正构烷烃(n-alkanes)的污染情况。[方法]n-alkanes样品采自广州市及其周边14座中小型水库或者湖泊,采用日本岛津2010型气相色谱质谱仪对n-alkanes样品进行定性与定量测定。[结果]各水库水相中的20种n-alkanes(记作∑(nC15-nC34))的浓度为0.12～3.55μg/L;颗粒物中∑(nC15-nC34)浓度为9.9～1 272μg/g;水体总浓度(溶解态+颗粒物)为0.33～46.9μg/L;各功能区n-alkanes平均浓度水平依次为:商贸区>农业区>工业区>水源区,略高于珠江三角洲河道水系。溶解态n-alkanes的总浓度与溶解态有机碳存在较好的线性关系,表明分析水相中n-alkanes具有指示水中溶解态有机污染总量的作用。水体中n-alkanes来源复杂,主要来自化石燃料的燃烧和生活污水排放。[结论]广州市各水库的水体受到的n-alkanes污染处于中等水平,市区的3个湖泊污染严重。
[Objective]The study aimed to research the contamination of n-alkanes in small and medium-sized reservoirs and lakes in Guangzhou City and its surrounding.[Method]The n-alkanes samples were collected from 14 small and medium-sized reservoirs and lakes in Guangzhou City and its surrounding and they were made for the qualitative and quantitative determination by Japanese Daojin 2010 type gas chromatography mass spectrometer [Result] In the various reservoirs,20 kinds of n-alkanes（recorded as ∑（nC15-nC34）） concn.in the water phase was 0.12-3.55 μg / L;that in the particulate matter was 9.9-1 272 μg / g;that in the water（dissolved ＋ particles） was 0.33-46.9 μg/L in total;the average concn.of n-alkanes in various function areas were： business regions agricultural regions industrial regions water resource regions,being slightly higher than the river stream of Pearl River Delta.The total concn.of dissolved n-alkanes had a good linear relationship to the dissolved organic carbon,showing that n-alkanes in the analyzed water phase had a role of indicating the total amount of dissolved organic pollution in the water.The resource of n-alkanes in the water was complex,mainly from the burning of the fossil fuels and domestic sewage.[Conclusion] The n-alkanes pollution in the water of various reservoirs in Guangzhou City was at middle level and the n-alkanes pollution in 3 lakes of Guangzhou City were serious.
出处
《安徽农业科学》
CAS
北大核心
2011年第31期19372-19374,共3页
Journal of Anhui Agricultural Sciences
关键词
广州市
水库
正构烷烃
Guangzhou City
Reservoirs
N-alkanes
