Effect of Crude Water Eztract of Fructus Gleditsiae Sinensis on the Removal of Phenanthrene and Pyrene from Contaminated Soils
Polycyclic aromatic hydrocarbons (PAHs) in soils can be mobilized by surfactants and other mobilizing agents such as dissolved organic matter (DOM). DOM from Fructus Gleditsia sinensis contains a large amount of natural non-ionic surfactant triterpenoid saponins and thus can be considered as a natural complex of general DOM and natural non-ionic surfactants. In this study we use crude water extract of Fructus Gleditsiae sinensis Lain. (CWE-FGS) as a removal agent with no purification procedure to investigate the possibility of developing a more green and more cost effective remediation agent that may compete for the chemically synthesized manmade surfactants or purified or partially purified natural biosurfactants. Results showed that the removal rates of phenanthrene and pyrene from contaminated soils by 5% of CWE-FGS were 59% and 52%, respectively. The removal capacities of Tween 80 and rhamnolipids for PAHs from contaminated soils were also studied for comparison. The removal capacity of CWE-FGS for PAHs from contaminated soils was lower than that of Tween 80, but higher than that of rhamnolipids. Thus, it can be safely conclude that CWE-FGS can be a potential natural remediation agent for PAHs from contaminated soils.
Polycyclic aromatic hydrocarbons (PAHs) Surfactant Dissolved organic matter (DOM) Fructus Gleditsiae Sinensis Remediation agent
Ran Wei Jun Wang Hongyu Yang Yi Chen Peifen Liu Jinzhi Ni
Key Laboratory of Subtropical Resources and Environments of Fujian Province,School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China
国际会议
杭州
英文
223-225
2009-10-10（万方平台首次上网日期，不代表论文的发表时间）