高pH环境对胶体在饱和多孔介质中迁移的影响

发布时间：2018-01-12 02:13

  本文关键词：高pH环境对胶体在饱和多孔介质中迁移的影响　出处：《中国环境科学》2017年09期 　论文类型：期刊论文

  更多相关文章： 胶体 吸附 迁移 饱和多孔介质 pH

【摘要】：以超纯水漂洗和经酸处理过的玻璃微珠作为对照,通过比较在不同p H环境下胶体在两种多孔介质中的吸附解吸行为来探讨高p H环境对胶体迁移的影响.结果表明,不利条件下通过提高环境的p H可以使吸附在初级势阱中的胶体解吸下来,从而降低胶体的吸附能力.不利条件下化学杂质有利于胶体在初级势阱中的吸附.然而随着环境p H的增加,这些因化学杂质而发生吸附的胶体会有部分被释放出来.当溶液的p H增加到10或更高后,化学杂质对胶体吸附过程的影响可以忽略.胶体在多孔介质表面的吸附数量与胶体的吸附解吸过程和溶液的环境有关,尤其是高p H值环境.研究证实了传统DLVO理论存在一定局限性.本研究为高p H环境在胶体迁移中发挥的作用提供了进一步的认识.
[Abstract]:In ultrapure water rinsing and the acid treated glass beads as the control, through the comparison of the different P under the environment of H colloid in two kinds of porous medium adsorption and desorption behavior of high P H to explore the environmental effects on colloid transport. The results show that under adverse conditions by improving the environment of the p H can make the colloid desorption in the primary adsorption potential in the down, thereby reducing the adsorption capacity of colloid. The chemical impurities under adverse conditions is beneficial to adsorption of colloid in the primary trap. However, with the increase of P H, the adsorption due to chemical impurities and the occurrence of colloidal gold was partly released. When the solution P increased to H 10 or higher, effect of chemical impurities on the colloid adsorption process can be neglected. In the adsorption desorption process and colloid solution adsorption surface of the porous medium and the number of colloidal environment, especially the high P H value environment. Research proves that the traditional DLV The O theory has some limitations. This study provides a further understanding of the role played by the high P H environment in colloid migration.

【作者单位】： 山西大学环境与资源学院;山西大学资源与环境工程研究所;江西师范大学鄱阳湖湿地与流域研究教育部重点实验室;中国科学院遗传所农业资源研究中心中国科学院农业资源重点实验室河北省节水农业重点实验室;
【基金】：国家自然科学基金项目(41301033)
【分类号】：X131
【正文快照】： 近年来,胶体在多孔介质中的迁移行为成为环境领域的热门研究话题.预测胶体在多孔介质中的迁移行为一方面可以评估微生物在地下水中迁移的环境风险[1],另一方面还可以应用于生物修复[2].p H作为影响胶体在饱和多孔介质中迁移的重要因素,学者们已经进行了大量的研究[3-4].由于多，

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