悬浮颗粒物浓度对溢油沉潜过程影响的试验研究

溢油事故发生后，漂浮油会与水中的悬浮颗粒物发生相互作用形成油-悬浮颗粒物聚合体（oil-suspended particulate matter aggregates，OSAs），进而分散在水中或沉降到水底。实验室通过批量振荡实验，利用紫外分光光度法，研究了天然沙土对阿曼原油沉潜过程的影响。结果表明，当振荡频率一定时，沙土能够显著促进阿曼原油在水中的沉潜，其中大部分以半潜油的形式悬浮在水中，少部分与沙土相互作用形成了油-悬浮颗粒物聚合体。随着振荡时间的增加，阿曼原油的沉潜率迅速增大，达到最大值后趋于稳定。当沙土的浓度在100~400 mg/L范围内增加时，阿曼原油的最大沉潜率和沉潜速率提高，沉潜过程达到平衡所需要的时间缩短。

A laboratory study on the effect of suspended particulate matter concentration on the submerging and sinking process of oil spill

Oil slick and suspended particles in the water can interact to form oil-suspended particulate matter aggregates (OSAs) which will disperse in the water column or sink to the bottom after oil spill events. A laboratory oscillation experiment combined with UV spectrophotometry was performed to investigate the effect of natural sand on the submerging and sinking process of Oman crude oil. Results indicated that the sand obviously accelerated the submerging and sinking process of Oman crude oil under a certain frequency oscillation, Most of the oil suspended in the water column and little interacted with the particles to form OSAs. The oil submerging and sinking efficiency increased rapidly with time and then converged to a maximum. When the concentration increased from 100 to 400 mg/L, the maximum oil submerging and sinking efficiency and speed increased, and the time to equilibrium decreased.