高含盐含铁对水中黏土颗粒粒径中值大小的影响

A Study on the Particle Size of Clay in High-salt and High-iron Water

应用显微图象分析系统,研究了水中NaC l、CaC l2、Fe2+等对黏土颗粒粒径中值的影响。结果表明:随着体系中离子浓度的增加,颗粒粒径中值增大。当体系中黏土颗粒浓度为100 mg/l时,NaC l浓度为40 000 mg/l时的颗粒长轴粒径中值为13.70μm,短轴粒径中值为10.06μm;CaC l2浓度为5 000 mg/l时的颗粒长轴粒径中值为12.17μm,短轴粒径中值为7.76μm;Fe2+浓度为100 mg/l时的颗粒长轴粒径中值为12.53μm,短轴粒径中值为10.25μm。NaC l、CaC l2浓度分别为40 000 mg/l和5000 mg/l、Fe2+浓度为30 mg/l时,颗粒长轴中值为14.95μm,短轴中值为11.94μm。当水中NaC l、CaC l2、Fe2+浓度分别为40 000 mg/l、5 000 mg/l和100 mg/l时,加入H2O2,颗粒长轴中值增加到22.44μm,短轴中值增加到14.54μm。

By means of optical microscopy analysis system,the effect on the particle size of clay in high-salt and high-iron water caused by concentration of NaCl,CaCl_2,Fe^(2+) and adding volume of H_2O_2 was investigated.The results show that the particle size increases with the increasing concentration of NaCl,CaCl_2 and Fe^(2+).As the concentration of clay particle is 100mg/l,and NaCl is 40 000mg/L,the middle value of major axis of particle size increases up to 13.70μm and the minor axis up to 10.06μm.With the same concentration of clay particle,as CaCl_2 is 5 000mg/L,or Fe^(2+) is 100mg/L,the middle value of major axis of particle size increases up to 12.17μm or 12.53μm, and the minor axis up to(7.76)μm or 10.25μm respectively.As NaCl is 40 000 mg/L,CaCl_2 is 5000mg/L,and Fe^(2+) is 30mg/L,the middle value of major and minor axes of particle size are(14.95)μm and 11.94μm respectively.In addition,the middle value of major and minor axes of particle size shows an increase up to 22.44μm and(14.54)μm after adding H_2O_2 as the concentration of NaCl is 40 000mg/L,CaCl_2 is 5 000mg/L and Fe^(2+) is 100mg/L in the same water solution system.