潮间带海洋沉积物——大气痕量汞的释放及释放通量研究

The Research on Trace Mercury of Releasing and Releasing Flux in Marine Sediments—Air on Intertidal Zone

在对厦门海域汞污染调查的基础上,选择典型区域的海洋沉积物作为研究对象,系统地研究了潮间带海洋沉积物痕量汞在光照和遮光作用下的释放过程、释放通量以及影响释放通量的主要因素。研究结果表明,光照作用有利于潮间带海洋沉积物痕量汞的释放,平均释放通量大约是遮光作用下的1.7～1.9倍;潮间带海洋沉积物中痕量汞的释放通量随着大气温度、沉积物-水系统温度和光照强度的升高而增加;随着大气相对湿度的增加而降低;而风速对其影响不明显。

On the basis of the investigation into the mercury contamination in the Xiamen sea area,representative marine sediments were sampled,the release process and releasing flux of trace mercury on the effecting of solar and dark was systemically studied,meantime,the main effecting factors of releasing flux in marine sediments-air was also studied.The research results show that it benefits to release on solar radiation,and average releasing flux of trace mercury in marine sediments on solar radiation to dark is 1.7~1.9 times;the fluxes increase with the increase of air temperature,sediments-water temperature and solar intensity,while decreases with the increase of air humidity and it was not obvious with wind velocity.