摘要
采用现场采样及室内测试方法,研究了罗家角遗址(7000aBP)和跨湖桥遗址(8000aBP)两个含有史前古水稻土的土壤剖面中的多环芳烃(PAHs)分布特征。结果显示:罗家角遗址剖面中表层水稻土PAHs含量最高,其次是古水稻土层,各层中含量均较高的化合物为萘(Nap)和菲(Phe);而跨湖桥遗址剖面中,表层的荒地土壤含量最低,PAHs最高含量出现在底部的古水稻土层,各层含量较高的化合物为菲(Phe)和芴(Flu)。相关分析表明,PAHs与土壤有机碳含量显著相关(r2=0.868),与粘粒含量之间也有良好的相关性(r2=0.585),这表明土壤的理化性质会影响PAHs在土壤中的分布,但在耕作土壤中,现代人类生产活动的扰动可能会削弱这种影响。
The distribution of polycyclic aromatic hydrocarbons （PAHs） in two prehistoric paddy soil profiles, in Luojiajiao （7 000 a BP） and Kuahuqiao （8 000 a BP） respectively, were investigated. The results showed that in the Luojiajiao profile, the highest content of the 15 EPA PAHs was observed in the surface horizon, followed by the soil layer in the ancient paddy soil, naphthalene （Nap） and phenanthrene （Phe） were the two predominant compounds in all soil layers. While in the Kuahuqiao profile, the total content of PAHs in the surface soil of waste land was lowest, and the highest content existed just above the bottom soil in the prehistoric paddy soil, the most abundant compounds were Fluorene （Flu） and Phe in the whole profile. The total content of PAHs was significantly correlated with content of soil organic carbon （r^2= 0.868） and had a good relationship with clay content （r^2=0.585）, suggesting that soil organic matters played an important role in controlling the distribution and transport of PAHs in soils, and which might be weakened by current human activities in surface arable soils.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2007年第1期224-229,共6页
Journal of Agro-Environment Science
基金
国家自然科学基金重点项目资助(DO115-40335047)
关键词
多环芳烃
土壤剖面
分布
有机碳
粘粒
PAHs
prehistoric paddy soil profile
distribution
organic carbon
clay
