黄河不同泥沙组分对水中CODMn的降解性能研究

Study on Degradation Performance of Different Sediment Components of Yellow River to CODMn

为研究黄河不同泥沙组分对CODMn的降解特性,以黄河兰州段的沉积性泥沙和悬浮态泥沙为供试样品,采用批量实验法对比了黄河泥沙降解规律、动力学和热力学特征。结果表明,黄河悬浮态泥沙较沉积性泥沙达到吸附平衡所用时间更短、吸附速率更快、平衡吸附量更大;对比灭菌前、后黄河不同泥沙组分的吸附作用,黄河沉积性泥沙灭菌前的平衡吸附值为1.930mg/g,灭菌后为1.691mg/g,黄河悬浮态泥沙灭菌前的平衡吸附值为2.446mg/g,灭菌后为1.761mg/g,且灭菌前的吸附速率常数更大,说明黄河泥沙附着的微生物促进了CODMn的降解,但作用小于吸附作用。

In order to study the degradation characteristics of CODMn different sediments of the Yellow River,the sedimentary sediment and suspended sediment in the Lanzhou section of the Yellow River were used as test samples,and the sedimentation law,kinetics and thermodynamic characteristics of the Yellow River sediment were compared by batch experiment.The results show that the suspended sediment in the Yellow River has a shorter time for the sedimentary sediment to reach the adsorption equHibrium.The adsorption rate is faster,and the equilibrium adsorption amount is larger.Compared tothe adsorption of different components of the Yellow River sediment before and after sterilization,the Yellow River sediments Equilibrium adsorption value before sterilization of sexual sediment is 1.930 mg/g.And after the sterilization was 1.691 mg/g.The equilibrium adsorption value before the suspension of the suspended sediment in the Yellow River was 2.446 mg/g,and after sterilization was 1.761 mg/g,and the adsorption rate constant before sterilization is larger,indicating that the microorganisms attached to the Yellow River sediment promote the degradation of CODMn,but the effect is less than the adsorption.