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中文摘要：
在松花江3个典型断面（哈尔滨、达连河和佳木斯）采集了3类不同性质的沉积物，分别研究了2，4-二氯苯酚在松花江沉积物上的吸附-解吸特性．结果表明：2，4-二氯苯酚在3种沉积物上的吸附在24h内均可达到吸附平衡，其吸附-解吸过程符合Freundlich方程（R^2〉0．92）．在3类沉积物样品上的吸附作用强度大小依次为佳木斯沉积物〉达连河沉积物〉哈尔滨沉积物．2，4-二氯苯酚在3种沉积物上吸附-解吸滞后系数（HI）都小于1，说明2，4-二氯苯酚的解吸行为存在较为明显的滞后现象，肼值大小依次为：哈尔滨〉达连河〉佳木斯．HI值与沉积物理化性质成正相关（R^2〉0．444）．
英文摘要：
In this paper, the batch isotherm experiments were performed to study the characteristics of adsorption and desorption of 2,4-DCP on three sediments with different physical-chemical characters, which were col lected from the Songhua River in Harbin, Dalianhe and Jiamusi. Experimental results demonstrate that the ad- sorption of 2,4-DCP in three sediments can be completely balanced in 24 h. The adsorption isotherm is nonlinear and fitted with the form of the Freundlich equation under experimental condition （R^2 〉 0. 92）. The adsorption capacity of sediment follows the order： Jiamusi sediment 〉 Dalianhe sediment 〉 Harbin sediment. The value of HI follows the order： Harbin sediment 〉 Dalianhe sediment 〉 Jiamusi sediment. The desorption process of 2,4- DCP has an obvious hysteresis, and all of them are less than 1. Furthermore, the co-relationship between HI and the physical-chemical characters of sediment is positive（R^2 〉0. 444 ）.
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