摘要
在收集查阅国内外已有研究资料的基础上,对地下水中胶体稳定性、迁移机制以及模拟预测方法进行了详细归纳和总结。研究表明,胶体稳定性主要受自身理化性质和水文地球化学条件的影响,其受控于胶体粒径、形态、电势电位以及地下水的pH、离子强度等条件。胶体在多孔介质中的迁移机制主要表现为胶体沉积和形变阻塞,其中针对胶体稳定性的差异性,胶体沉积过程分别表现为表面封阻和过滤熟化。目前有关胶体在地下水中迁移的模拟技术已发展得日益成熟,但结合多孔介质非均质性和胶体化学性质非均质性的数学模型还需进一步探讨。
Colloids are widely distributed in groundwater systems and facilitate transport of trace elements and organics. They therefore play an important role in mass transfer with subsequent impacts on groundwater quality. In this contribution,we have summarized the current state of colloid research,including studies of colloid stability,transportation mechanisms,and methods for simulating colloid transport. Our findings suggest that colloid stability is influenced by physical and chemical properties,including the diameter,morphology and zeta potential of colloids,and hydrogeochemical conditions,including p H and the ionic strength of groundwater. Colloid transportation mechanisms in porous media include deposition and straining. Colloid deposition is described as either blocking or ripening because of differences in colloid stability. Current methods for simulating colloid transport are increasingly well-developed,but further methods that simulate the heterogeneity of porous media and associated colloid transport are needed.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2016年第4期629-638,共10页
Advances in Water Science
基金
国家自然科学基金资助项目(41472215)~~
关键词
胶体
多孔介质
胶体稳定性
迁移机制
模拟预测
colloid
porous media
colloid stability
migration mechanism
simulation and prediction
