Identification of the factors controlling the migration of hexavalent chromium (Cr (VI)) in soil can provide valuable information for pollution control and risk assessment. In this study, we assessed the processes of transportation and migration of Cr (VI) in soil by batch and column experiments. Breakthrough curves were used to examine the mobility of Cr (VI) in soil columns. Most of them could be described by a typical S-shaped curve. The Yoon–Nelson model and Thomas model were applied to predict the behavior of Cr (VI) in soil and obtained parameters to characterize the rate and capacity of adsorption. It was observed that all obtained parameters changed along with soil properties. Moreover, stepwise multiple regression and grey correlation analysis were used to determine the main control factors by evaluating the relationship between soil properties and dynamic or static parameters. The results showed Fe oxide content was the key factor no matter in static or dynamic adsorption while soil texture had a great influence on the transportation of Cr (VI) in soil columns. Also, in the actual situation, the external input condition should not be ignored. Our research provides meaningful information for authorities to develop better soil management and remediation strategies.

确定控制土壤中六价铬 (Cr (VI)) 迁移的因素可为污染控制和风险评估提供有价值的信息。在这项研究中，我们通过批量和柱状实验评估了土壤中 Cr (VI) 的运输和迁移过程。突破曲线用于检查土柱中 Cr (VI) 的迁移率。它们中的大多数可以用典型的 S 形曲线来描述。应用 Yoon-Nelson 模型和 Thomas 模型来预测土壤中 Cr (VI) 的行为，并获得表征吸附速率和容量的参数。观察到所有获得的参数随着土壤性质而变化。而且，采用逐步多元回归和灰色关联分析，通过评价土壤性质与动力或静态参数之间的关系，确定主要控制因素。结果表明，无论是静态吸附还是动态吸附，Fe的氧化物含量都是关键因素，土壤质地对Cr(VI)在土柱中的迁移有很大影响。另外，在实际情况下，外部输入条件也不容忽视。我们的研究为当局制定更好的土壤管理和修复策略提供了有意义的信息。不应忽略外部输入条件。我们的研究为当局制定更好的土壤管理和修复策略提供了有意义的信息。不应忽略外部输入条件。我们的研究为当局制定更好的土壤管理和修复策略提供了有意义的信息。