近海沉积物组份对有机物的吸附与吸附机理探讨

Study on the sorption of organic chemicals on model components of sudmarine sediment

以大连近海沉积物主要组份碳酸钙、金属氧化物、腐殖酸和粘土矿物为沉积物模拟样品，测定该４种组份对硝基苯等４种毒性有机的吸附等温线，在此基础上建立了多组份吸附剂吸附等温模式。通过吸附热的测定，探付了４种沉积物组份吸附毒性有机物的机理。

The sorption isotherms and sorption energies of four organic chemicals on four model components of submarine sediment. i. e. carbonate,organic matter, metallic oxides and clay minerals,were determined. The sorption isotherms on three inorganic components were fit for langmuir isotherm equation while that on organic component isotherm was fit for linear equation. On the basis of the isotherm equati on of each sorbant,the multi-component sorption model suitable to describe sorptionon mixing sorbants was set up. From the sorption energy the sorption mechanism of these organic chemicals on model sediments was found to be as follows:partition for the chemicals between organic component and water,Van der waals interaction on carbonate,and van der waals interaction with hydrogen bonding and dipole interaction on metallic oxides and clay minerals