[Influence of dissolved organic matter on the eco-toxicity of phenanthrene in a soil].
Biological and physico-chemistry experiments were conducted to study the effects of dissolved organic matter (DOM) on eco-toxicity of phenanthrene in a soil. The results showed that DOM was a kind of surfactant. The sensitive range of phe inhibiting wheat root elongation was from 0 to 200 mg/kg, and median inhibition concentration (IC50) was 200 mg/kg. In the presence of DOM, the eco-toxicity of phe could be alleviated and the inhabited degree was related to the content of hydrophobic components and surface activity. This effect could be strengthened by the high concentration of DOM. As a kind of hydrophobic organic compound, phe could reduce the moisture of topsoil, and DOM would slightly increase the moisture of topsoil polluted by phe. It was concluded that DOM could lighten the eco-toxicity of phe in soil.
College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
Xin-hua
XH
Zhan
Yin-jing
YJ
Wan
Li-xiang
LX
Zhou
D017753:Ecosystem; D009930:Organic Chemicals / Q000032:analysis*; D010616:Phenanthrenes / Q000633:toxicity*; D011084:Polycyclic Aromatic Hydrocarbons / Q000633:toxicity; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000633:toxicity*; D014908:Triticum / Q000187:drug effects* / Q000254:growth & development
D009930:Organic Chemicals; D010616:Phenanthrenes; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; C031181:phenanthrene