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模拟海洋微环境,向脱气的海洋沉积物中注入已知浓度的轻烃混合标准气体,探究轻烃在海洋沉积物中的吸附与解吸行为。吸附试验结果表明,溶解和吸附作用使各轻烃组分发生显著的变化,且引起低碳原子数轻烃的变化以溶解作用为主导,引起高碳原子数轻烃的变化以吸附作用为主导。同时,同碳数的烯烃较烷烃更容易被溶解,正构烷烃较异构烷烃更容易被吸附。解吸附实验表明,热解吸可以起到解吸附的作用,且溶解态轻烃相对于吸附态轻烃更容易被解吸。
Simulate the marine microenvironment by injecting a light hydrocarbon mixed standard gas of known concentration into the deaerated marine sediments to explore the adsorption and desorption behavior of light hydrocarbons in marine sediments. Adsorption test results show that the dissolution and adsorption of light hydrocarbons have significant changes in the composition, and cause changes in low-carbon light hydrocarbons to dominate the dissolution caused by changes in high-carbon light hydrocarbons dominated by adsorption . Meanwhile, olefins with the same carbon number are more easily dissolved than alkanes, and n-alkanes are more easily adsorbed than isoparaffins. Desorption experiments show that the thermal desorption can play a role in desorption, and the light hydrocarbons in the light state of adsorption compared to light hydrocarbons more easily desorbed.