沙质滩涂中可溶性油的释放动力学研究

沙质滩涂对石油类污染物的吸附是一种物理吸附过程，在一定的条件下，吸附于沙质滩涂中的石油类污染物又可能释放出来，对滨海环境造成新的污染。在对滨海沙滩（胶州湾）沙质滩涂-水系统石油污染调查的基础上，选择代表性的沙滩进行取样，系统测定不同沙质滩涂对可溶性油的释放动力学过程，并分析了盐度、pH、温度和含沙量对释放作用的影响。结果表明，沙质滩涂对可溶性油的释放动力学曲线符合对数型，即随着时间的延续释放速度逐渐降低，沙质滩涂对可溶性油的释放平衡时间约为10h，沙质滩涂对可溶性油的释放量随盐度和pH的增大而减少，随温度、含沙量和振荡频率的增加而增加。

Study on the Releasing Kinetics of Soluble Oil on Sandy Wattenmeer

The adsorption of oil contaminants on sandy wattenmeer is a physical adsorption process and the oil contaminants absorbed in sands can release to water again leading to new pollution to the coastal area. Based on the investigation of the oil contamination to sands and water systems in the Jiaozhou Bay, representative sands were sampled to systematically determine the releasing kinetic process of soluble oil for different kinds of sandy wattenmeer. The effects of factors such as salinity, pH, temperature and sand content on the release were studied. The research results showed that the releasing kinetic curve of soluble oil in sands fitted to logarithm type, of which the release decreases with time. The equilibrium period of the release was 10 hours. The release of soluble oil on sands decreased with the increase of the salinity and pH, while it increased with the increase of temperature, sand content and the vibrant frequency.