生物柴油对原油污染砂砾原油释放的影响

Impact on oil releasing from oil-polluted gravels by adding biodiesel

生物柴油是一种优良的溶剂,具有廉价易得、可降解、可再生等优点.研究生物柴油在海滩原油污染治理中的应用具有重要的意义.研究了生物柴油对原油污染砂砾释放油的影响,讨论了在不同生物柴油种类、投加量情况下生物柴油的作用效果.研究结果表明:不同种类生物柴油对原油污染砂砾释放油的促进效果不同,实验条件下菜籽生物柴油释放率最好(70.75%),地沟油生物柴油最差(58.39%);砂砾上原油的释放量随着生物柴油投加量的增加而增加,当生物柴油投加量达到一定值时,其对释放量和释放速率的促进都不再明显增加,实验条件下最适投加量为油污砂砾含油量的2倍.

Biodiesel is a good solvent,with the advantages of cheapness,biodegradation and renewal.It is meaningful to do the research on cleaning oiled shores with biodiesel.In this paper,a series of laboratory experiments were carried out to test the potential of biodiesel for cleaning oiled shorelines.First,biodiesel was shown to have a considerable capacity for releasing the crude oil on the sand with different kinds and dosages of biodiesel.Different kinds of biodiesel had different capacity for releasing the crude oil from the sand.In the experiments the rapeseed biodiesel had the best releasing efficiency（70.75%） and the waste oil biodiesel the worst efficiency（58.39%）.The oil releasing efficiency from the sand increased along with the increase of dosage of biodiesel.However,when the dosage was more than the double of the oil in the sand,the promoting effect of biodiesel was no longer obvious in the experiments.