钒在饱和多孔介质中的迁移:pH、离子强度和粘土矿物的影响

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2016-01-28 DOI:10.1080/09542299.2015.1133238

Yulu Wang, Xianqiang Yin, Huimin Sun, Changzhao Wang

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引用次数: 16

摘要

钒是土壤和地下水中常见的有害污染物，但其在多孔介质中的运移行为尚不清楚。研究了溶液pH、离子强度(IS)和粘土矿物对钒在饱和多孔介质中运移的影响。利用石英砂填充柱进行了一系列室内实验，探讨了在离子强度(0.001-0.1 M)和pH(4-8)范围内，以及两种不同类型的粘土矿物蒙脱土和高岭石中钒的保留和运输。突破性实验结果表明，钒在饱和多孔介质中具有高流动性。pH值的增加使钒在饱和多孔介质中的输运增加。该研究还表明，随着IS的增加，钒的转移更容易。与高岭石相比，蒙脱土提高了钒在柱中的迁移率。采用基于平流-色散方程的数学模型，结合平衡反应和动力学反应，很好地描述了钒在塔中的保留和输运。

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Transport of vanadium (V) in saturated porous media: effects of pH, ionic-strength and clay mineral

Abstract Vanadium, a hazardous pollutant, has been frequently detected in soil and groundwater, however, its transport behavior in porous media were not clearly understood. In this study, the effects of solution pH, ionic strength (IS) and the effect of clay mineral on the transport of vanadium in saturated porous media were investigated. Laboratory experiments using a series of columns packed with quartz sand were carried out to explore the retention and transport of vanadium with a range of ionic-strength (0.001–0.1 M) and pH (4–8) and two different types of clay minerals montmorillonite and kaolinite. Results of the breakthrough experiments showed that vanadium was highly mobile in the saturated porous media. The increase in pH rendered a higher transport of vanadium in saturated porous media. The study also indicated an easier transfer of vanadium with an increase in IS. Montmorillonite enhanced the mobility of vanadium in the column when compared to kaolinite. A mathematical model based on advection-dispersion equation coupled with equilibrium and kinetic reactions was used to describe the retention and transport of vanadium in the columns very well.

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.