林业科学2011，Vol.47Issue(8)：38-43,6.
绿化树种对土壤多环芳烃含量的影响
Effects of Afforestation Species on Concentration of Polycyclic Aromatic Hydrocarbons in Contaminated Soils
摘要
Abstract
Polycyclic aromatic hydrocarbons ( PAHs) are a kind of organic pollutants which chronically remain in environments, and they are particularly concerned because some of them are potent toxic and can pose a carcinogenics risk to humans, and some can be highly persistent in the environment. The aim of this study was to investigate changes of PAHs contents in diesel-contamiriated soils and to conduct a preliminary evaluation on the potential risk of residual PAHs after phytoremediation. The results showed that after one year PAHs concentration in the planted soils was reduced by 50. 6% , 61. 4% , 43. 9% compared with the control and PAHs in the soils declined mostly rapidly from the third month to the sixth month regardless afforested land or not. BaA, ANT, PYR were mostly decreased in the planted soils. Four tested tree species all enhanced degradation of the chemicals. Sediment quality guidelines ( SQGs) , developed for many potentially toxic substances, can be used to classify sediment samples with regard to their potential for toxicity, to identify contaminants of concern, and to prioritize areas of concern based on the frequency and degree to which the guidelines are exceeded. The calculated averages of the mean effect range median ( MERM) were used to preliminarily evaluate the potential ecological risk of residual PAHs in the diesel-contaminated soils after one-year phytoremediation. The FLO, PHE, PYR in the planted soils in L3 exceeded 1. 5 times of the values, indicating there existed the high ecological risk. Therefore, it is important to control PAHs pollution release.关键词
土壤/多环芳烃/风险评价/绿化树种Key words
soil/ PAHs/ risk evaluation/ afforestation species分类
农业科技引用本文复制引用
朱凡,田大伦,闫文德,王光军,梁小翠..绿化树种对土壤多环芳烃含量的影响[J].林业科学,2011,47(8):38-43,6.基金项目
国家自然科学基金(31070410,30771700) （31070410,30771700）
湖南省自然基金(10JJ3003) （10JJ3003）
国家林业局“948”项目(2008-4-36) （2008-4-36）
湖南省科技厅重点项目(06FJ3083、05NK3026) （06FJ3083、05NK3026）
教育部新世纪优秀人才支持计划(NCET-10-0151) （NCET-10-0151）
中南林业科技大学青年科学研究基金(2008003A,07024B). （2008003A,07024B）
