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- Title
Experimental and Modeling Study on Cr(VI) Migration from Slag into Soil and Groundwater.
- Authors
Wu, Xiange; Ye, Tiantian; Xie, Chunsheng; Li, Kun; Liu, Chang; Yang, Zhihui; Han, Rui; Wu, Honghua; Wang, Zhenxing
- Abstract
The transport and prediction of hexavalent chromium (Cr(VI)) contamination in "slag–soil–groundwater" is one with many uncertainties. Based on the column experiments, a migration model for Cr(VI) in the slag–soil–groundwater system was investigated. The hydraulic conductivity (Kt), distribution coefficient (Kd), retardation factor (Rd), and other hydraulic parameters were estimated in a laboratory. Combining these hydraulic parameters with available geological and hydrogeological data for the study area, the groundwater flow and Cr(VI) migration model were developed for assessing groundwater contamination. Subsequently, a Cr(VI) migration model was developed to simulate the transport of Cr(VI) in the slag–soil–groundwater system and predict the effect of three different control programs for groundwater contamination. The results showed that the differences in the measured and predicted groundwater head values were all less than 3 m. The maximum and minimum differences in Cr(VI) between the measured and simulated values were 1.158 and 0.001 mg/L, respectively. Moreover, the harmless treatment of Cr(VI) slag considerably improved the quality of groundwater in the surrounding areas. The results of this study provided a reliable mathematical model for transport process analysis and prediction of Cr(VI) contamination in a slag–soil–groundwater system.
- Subjects
GROUNDWATER; HYDROGEOLOGY; SLAG; GROUNDWATER quality; HEXAVALENT chromium; HYDRAULIC conductivity; GROUNDWATER flow
- Publication
Processes, 2022, Vol 10, Issue 11, p2235
- ISSN
2227-9717
- Publication type
Article
- DOI
10.3390/pr10112235