Abstract：Degradation of 13 PAHs in clean agricultural soil and CO2 emission was studied with the measures of (i) bioaugmentation, by adding aged PAH-polluted soil or PAH- polluted sludge; (ii) biostimulation, by introducing nutrition source of (NH4)2HPO4. Meanwhile, the release of CO2 was also determined. 2~5-ring PAHs were well degraded in agricultural soil confirming the degradation capacity of indigenous microorganisms. Additionally, the degradation of 5-ring PAHs was improved significantly after introducing of PAH-polluted soil, which indicated that the microbes in polluted soil were more powerful than those in clean agricultural soil in degrading high-molecular-weight PAHs. In contrast, no significant improvement in PAHs degradation occurred with addition of polluted sludge, possibly due to the aerobic condition in the experiment. With addition of nutrition sources ((NH4)2HPO4), the degradation of PAHs in aged soil increased significantly, except for the 5-ring PAHs with a degradation rate less than 10%. The release of CO2 during the incubation experienced an initial of rapid increase followed by a sharp decrease, then stabilized after a slight increase, highly corresponding to PAHs degradation, which indicated a close relationship between PAHs degradation process and microbial activity.
王聪颖, 王芳, 王涛, 尹春芹, 卞永荣, 蒋新. 生物强化和生物刺激对土壤中PAHs降解的影响[J]. 中国环境科学, 2010, 30(1): 121-127.
WANG Cong-Ying, WANG Fang, WANG Tao, YIN Chun-Qin, BIAN Yong-Rong, JIANG Xin. Effects of bioaugmentation and biostimulation on PAHs degradation in soil. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(1): 121-127.
