Vahabisani Azar, An Chunjiang, Xin Xiaying, Owens Edward, Lee Kenneth
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC, H3G 1M8, Canada.
Department of Civil Engineering, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada.
Environ Sci Pollut Res Int. 2021 Feb 26. doi: 10.1007/s11356-021-12870-5.
This study focused on the impact of microalgal biomass on the oil behavior in a sand-water system. The microalgal biomass was characterized, and the interaction between microalgal biomass and oil was analyzed through Fourier transform infrared (FTIR) spectroscopy. The effects of different conditions including microalgal biomass dose, pH, temperature, and salinity on the oil behavior were investigated. A two-level factorial analysis was also used to further explore the interactions of these conditions. The microalgal biomass was found to be the most influential parameter for the residual crude oil on sand. Higher microalgal biomass dose resulted in less residual oil on sand. The remaining oil decreased with increasing solution pH from 4 to 7, and an increase of remaining oil was observed when the pH was further increased above 7. In addition, temperature and salinity could affect the removal of crude oil in the presence of microalgal biomass. Increasing the temperature could result in less residual oil on sand and there was higher oil removal at the high salinity. The effects of microalgal biomass on the oil behavior could also be impacted by environmental conditions. The results of this study indicate that the presence of algae in the oiled shoreline can be considered in the comprehensive evaluation of spill risk and prediction of oil fate.
本研究聚焦于微藻生物质对砂-水体系中油行为的影响。对微藻生物质进行了表征，并通过傅里叶变换红外（FTIR）光谱分析了微藻生物质与油之间的相互作用。研究了包括微藻生物质剂量、pH值、温度和盐度在内的不同条件对油行为的影响。还采用二级析因分析进一步探究了这些条件之间的相互作用。发现微藻生物质是影响砂上残余原油的最具影响力的参数。较高的微藻生物质剂量导致砂上的残余油减少。随着溶液pH值从4增加到7，剩余油量减少，而当pH值进一步升高到7以上时，观察到剩余油量增加。此外，温度和盐度在有微藻生物质存在的情况下会影响原油的去除。升高温度会导致砂上的残余油减少，在高盐度下有更高的油去除率。微藻生物质对油行为的影响也可能受到环境条件的影响。本研究结果表明，在溢油风险的综合评估和油归宿预测中可以考虑油污染海岸线中藻类的存在。
