拒马河悬浮沉积物对重金属的吸附—解吸研究

Study on Adsorption of Heavy Metals by Suspended Sediment of Juma River

研究了拒马河重金属在底质、悬浮物及水体中的分布特性和迁移转化规律 ,经试验得出悬浮物对重金属的吸附与解吸模型。拒马河沉积物对重金属的吸附符合弗兰德利希等温式 ,依据其数学模型计算出吸附与解吸系数 K1 、K2 。探讨了温度、初始浓度、吸附剂浓度对吸附、解吸系数的影响 ,建立起 K值的经验公式 ,将计算值与实验值对照 。

This paper studies the characteristics of the distribution,transportation,and transformation of heavy emtals in the bed load,suspended load and water body of the Juma River.An adsorption and desorption model of suspended load for heavy metals is developed on the basis of experiments.The adsorption isotherm of heavy metals all obeys the Freundlich equation;and according to the mathematical model the values of K 1 and K 2 can be calculated.The effect of temperature,initial concentration and adsorbent concentration on the value of K 1 and K 2 is discussed and an empirical formula of K value is established. A comparison with the experimental value shows that the calculated result is satisfactory.