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采出水中硫酸钙在膨润土表面的沉积过程

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李珊, 李彦, 屈撑囤. 采出水中硫酸钙在膨润土表面的沉积过程[J]. 环境工程学报, 2015, 9(10): 4741-4745. doi: 10.12030/j.cjee.20151020
引用本文: 李珊, 李彦, 屈撑囤. 采出水中硫酸钙在膨润土表面的沉积过程[J]. 环境工程学报, 2015, 9(10): 4741-4745. doi: 10.12030/j.cjee.20151020
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Li Shan, Li Yan, Qu Chengtun. Deposition process of calcium sulfate in produced water on bentonite particles'surface[J]. Chinese Journal of Environmental Engineering, 2015, 9(10): 4741-4745. doi: 10.12030/j.cjee.20151020
Citation: Li Shan, Li Yan, Qu Chengtun. Deposition process of calcium sulfate in produced water on bentonite particles'surface[J]. Chinese Journal of Environmental Engineering, 2015, 9(10): 4741-4745. doi: 10.12030/j.cjee.20151020
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采出水中硫酸钙在膨润土表面的沉积过程

  • 1.

    西安石油大学化学化工学院, 西安 710065

  • 基金项目:

    国家自然科学基金资助项目(21376189)

  • 中图分类号: X523

Deposition process of calcium sulfate in produced water on bentonite particles'surface

  • 1.

    College of Chemistry and Chemical Engineering of Xi'an Shiyou University, Xi'an 710065, China

  • Fund Project:

  • 摘要: 微生物在采出水处理中的应用越来越广泛,但污水中的硫酸钙等在微生物表面的沉积会降低微生物的处理效果。为了研究硫酸钙垢在颗粒表面的沉积过程,利用光学显微镜、激光粒度仪测定了硫酸钙垢在粘土颗粒表面的生长形态以及粒径的大小与时间的关系;通过溶液析晶过程中电导率的变化,探索了垢在表面反应阶段的结晶动力学;同时对垢沉积过程中Zeta电位的变化规律进行研究。结果表明,硫酸钙在膨润土表面反应阶段为一级反应,反应速率常数为0.00675 min-1;10 min以后电导率不变进入晶粒长大期。晶体在粘土表面沉积过程中颗粒呈现大小循环变化趋势,总体在9~17 μm之间变化。硫酸钙在膨润土表面沉积过程的Zeta电位由最大值的-34.6 mV逐渐恒定到-5~-7 mV。
    Abstract: The application of microorganisms in produced water treatment has become more and more widely,but calcium sulfate in the sewage may deposit on the surface of microorganisms,which can reduce its treatment effect.In order to study the deposition process of calcium sulfate scale on the particles' surface,we measured the growth form of the calcium sulfate scale on clay particles' surface and studied the relationships between particle size and time by using optical microscope and laser particle size instrument.Meanwhile,by analyzing the electrical conductivity in crystallization process,we explored the crystallization kinetics about scale in the surface reaction stage and studied the change law of Zeta potential in the scale deposition process.The results show that the reaction of calcium sulfate on bentonite surface belongs to a first-order reaction and its rate constant is 0.00675 min-1;the conductivity remains constant after 10 minutes and then the system enters the grain growth period;the size of crystal particle has cyclic changes between 9-17 microns in the deposition process;Zeta potential in the scale deposition process has the maximum value of -34.6 mV at the beginning,which becomes constant gradually within the range of -5—-7 mV.
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  • 收稿日期:  2014-08-22
  • 刊出日期:  2015-10-14

采出水中硫酸钙在膨润土表面的沉积过程

  • 1. 西安石油大学化学化工学院, 西安 710065
  • 收稿日期:  2014-08-22
基金项目:

国家自然科学基金资助项目(21376189)

摘要: 微生物在采出水处理中的应用越来越广泛,但污水中的硫酸钙等在微生物表面的沉积会降低微生物的处理效果。为了研究硫酸钙垢在颗粒表面的沉积过程,利用光学显微镜、激光粒度仪测定了硫酸钙垢在粘土颗粒表面的生长形态以及粒径的大小与时间的关系;通过溶液析晶过程中电导率的变化,探索了垢在表面反应阶段的结晶动力学;同时对垢沉积过程中Zeta电位的变化规律进行研究。结果表明,硫酸钙在膨润土表面反应阶段为一级反应,反应速率常数为0.00675 min-1;10 min以后电导率不变进入晶粒长大期。晶体在粘土表面沉积过程中颗粒呈现大小循环变化趋势,总体在9~17 μm之间变化。硫酸钙在膨润土表面沉积过程的Zeta电位由最大值的-34.6 mV逐渐恒定到-5~-7 mV。

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