摘要
采集江苏省太湖地区吴江市表层和亚表层的水稻土,用高效液相色谱测定其中16种多环芳烃(PAHs)的含量。结果表明,PAHs总量在表层水稻土中为219.5～1628.6μg·kg-1,亚表层中为83.9～1182.0μg·kg-1,表层土壤中PAHs总量高于亚表层,靠近工业区的水稻土中PAHs的含量高于农区。在检测的PAHs中,二环、三环、四环的含量之和约为总量的67.9%～98.3%。PAHs总量与土壤有机碳含量的相关系数为0.62(P<0.05),呈显著正相关,表明水稻土中土壤有机碳对吸附PAHs起重要作用。7个主要PAHs污染物的相关因子和主成分分析及菲/蒽、芘/荧蒽比值表明,太湖水域通航船只的油类泄露和化工染料工业(石油类制品)废水排放是吴江市农田水稻土中PAHs的主要来源。
In this study, topsoil samples of paddy soils were collected from selected sites of Wujiang, Suzhou Municipality, Jiangsu, an area with rapid industrialization. Contents of 16 polycyclic aromatic hydrocarbons （PAHs） were determined with HPLC. Total PAHs varied widely from 219.5-1628.6μg·kg^-1 in surface layer, 83.9-1182.0μg·kg^-1 in subsurface layer, indicating generally higher in the former than in the later. Concentrations of PAHs in soils of industrial area are also higher than that of agricultural area. The PAHs with low molecular weight （2-4 rings） dominated the determined total PAHs, being basically 67.9%-98.3% of the total. There existed a general correlation of total PAHs content with total organic carban （TOC） content （correlation coefficient is 0.62, P〈0.05）, supporting that the TOC might act as a sink for PAHs in paddy soils. Correlation factors between seven PAHs concentrations and principal component analysis, together with the ratios of Phe/Ant, Fla/Pyr indicate that the sources of PAHs in paddy soil are mainly influenced by petroleum and phthalocyanine.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第6期1166-1170,共5页
Journal of Agro-Environment Science
基金
国家自然科学基金重点项目(40231016)
