Hg(Ⅱ)在泉州湾滩涂沉积物上的吸附

Sorption of Hg(Ⅱ) on the Tidal Flat Sediments of Quanzhou Bay

研究了Hg(Ⅱ)在泉州湾滩涂沉积物上的吸附行为,并在此基础上初步探讨了其吸附机理.主要讨论了pH和温度对吸附作用的影响,并绘制了吸附等温线.实验结果表明,常温下Hg(Ⅱ)在泉州湾滩涂沉积物上的吸附平衡时间约需3 h,吸附作用随pH的升高而增强,受温度的影响变化不大.其吸附行为既符合F reund lich型吸附等温式,又符合L angum u ir型吸附等温式,说明其吸附机理非常复杂.

The sorption properties of Hg（Ⅱ） on the tidal flat sediments of Quanzhou Bay were studied. And the sorption mechanism was preliminarily discussed on the basis of the measured data. The effects of pH and temperature on the sorption were mainly discussed. The sorption isotherm was evaluated at the same time. The results show that the sorption equilibration time of Hg（Ⅱ） on the tidal flat sediments of Quanzhou Bay is about 3 hours, and the sorption capacity increased with pH while altered little with temperature. The sorption behavior of Hg（Ⅱ） on the tidal flat sediments of Quanzhou Bay can be well described by Freundlich and Langumuir sorption isotherm equations. This result indicates that the sorption mechanisms of Hg （Ⅱ） on the tidal flat sediments of Quanzhou Bay are very complex actually.