Seo Youngwoo, Lee Woo-Hyung, Sorial George, Bishop Paul L
Department of Civil and Environmental Engineering, University of Cincinnati, 765 Baldwin Hall, PO Box 210071, Cincinnati, OH 45221-0071, USA.
Environ Pollut. 2009 Jan;157(1):95-101. doi: 10.1016/j.envpol.2008.07.022. Epub 2008 Oct 29.
Lab scale mulch biofilm barriers were constructed and tested to evaluate their performance for preventing the migration of aqueous and surfactant solubilized PAHs. The spatial distribution of viable PAH degrader populations and resultant biofilm formation were also monitored to evaluate the performance of the biobarrier and the prolonged surfactant effect on the PAH degrading microorganism consortia in the biobarrier. Sorption and biodegradation of PAHs resulted in stable operation of the system for dissolved phenanthrene and pyrene during 150 days of experimentation. The nonionic surfactant could increase the solubility of phenanthrene and pyrene significantly. However, the biobarrier itself couldn't totally prevent the migration of micellar solubilized phenanthrene and pyrene. The presence of surfactant and the resultant highly increased phenanthrene or pyrene concentration didn't appear to cause toxic effects on the attached biofilm in the biobarrier. However, the presence of surfactant did change the structural composition of the biofilm.
构建并测试了实验室规模的覆盖生物膜屏障，以评估其在防止水溶性和表面活性剂增溶多环芳烃迁移方面的性能。还监测了可培养的多环芳烃降解菌种群的空间分布以及由此产生的生物膜形成情况，以评估生物屏障的性能以及表面活性剂对生物屏障中多环芳烃降解微生物群落的长期影响。在150天的实验过程中，多环芳烃的吸附和生物降解使系统对溶解的菲和芘实现了稳定运行。非离子表面活性剂可显著提高菲和芘的溶解度。然而，生物屏障本身并不能完全阻止胶束增溶的菲和芘的迁移。表面活性剂的存在以及由此导致的菲或芘浓度大幅增加，似乎并未对生物屏障中附着的生物膜产生毒性作用。不过，表面活性剂的存在确实改变了生物膜的结构组成。
