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Remediation of High Concentration Chromium Contaminated Soil by Enhanced Electrodynamic Method
Remediación de suelos contaminados con cromo de alta concentración mediante un método electrodinámico mejorado
DOI:
https://doi.org/10.15446/esrj.v25n2.93896Keywords:
Enhanced electrodynamic method; High concentration chromium; Contaminated soil method; Solubility (en)Método electrodinámico mejorado; Cromo de alta concentración; Método de suelo contaminado; Solubilidad (es)
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High concentration of chromium salt has caused serious pollution to the environment since its production. The long-standing chromium residue has polluted the soil, and the total chromium concentration of some polluted soil has reached 30000 mg / kg. For the remediation of chromium contaminated soil, the enhanced electrodynamic method was proposed. In order to improve the efficiency of electrokinetic remediation of chromium contaminated soil, two enhanced electrokinetic remediation technologies were proposed: Electrokinetic oxidation enhanced remediation technology and electrokinetic enhanced remediation technology. (III) in soil was polluted by oxidant chromium oxide to increase the content of dissolved (VI),so as to improve the efficiency of electric repair, in order to find a suitable PRB medium as a breakthrough to improve the repair efficiency. The experimental results show that compared with the traditional electrodynamic technology, the enhanced electrodynamic method can effectively improve the removal rate of total chromium in the soil, and provide technical support for the enhanced electrodynamic remediation of chromium contaminated soil. The pH control system makes the pH of anode and cathode electrolyte always maintain acidic, and the H+ migration speed is faster than that of OH-, and the pH of soil near the anode is lower than that near the cathode.
La alta concentración de sal de cromo ha causado una grave contaminación al medio ambiente desde su producción. El residuo de cromo de larga data ha contaminado el suelo y la concentración total de cromo de algunos suelos contaminados ha alcanzado los 30000 mg / kg. Para la remediación de suelos contaminados con cromo, se propuso el método electrodinámico mejorado. Para mejorar la eficiencia de la remediación electrocinética de suelos contaminados con cromo, se propusieron dos tecnologías mejoradas de remediación electrocinética: Tecnología de remediación mejorada por oxidación electrocinética y tecnología de remediación mejorada por oxidación electrocinética. (III) en el suelo fue contaminado por óxido de cromo oxidante para aumentar el contenido de(VI) disuelto, para mejorar la eficiencia de la reparación eléctrica, para encontrar un medio PRB adecuado como un gran avance para mejorar la eficiencia de la reparación. Los resultados experimentales muestran que, en comparación con la tecnología electrodinámica tradicional, el método electrodinámico mejorado puede mejorar eficazmente la tasa de eliminación del cromo total en el suelo y proporcionar apoyo técnico para la remediación electrodinámica mejorada del suelo contaminado con cromo. El sistema de control de pH hace que el pH del electrolito del ánodo y del cátodo siempre se mantenga ácido, y la velocidad de migración del H+ es más rápida que la del OH-, y el pH del suelo cerca del ánodo es más bajo que el del cátodo.
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1. Jie Yu, Jiang Yu, Siwei Deng, Zhi Huang, Ze Wang, Weiwei Zhu, Xueling Zhou, Longyu Liu, Donghai Wu, Hanyi Zhang. (2024). Oxidation of chromium(Ⅲ): A potential risk of using chemical oxidation processes for the remediation of 2-chlorophenol contaminated soils. Journal of Environmental Management, 359, p.120973. https://doi.org/10.1016/j.jenvman.2024.120973.
2. Anelise Bueno Selbach Barreto, Hugo Carlos Scheuermann Filho, Karla Salvagni Heineck, Nilo Cesar Consoli. (2024). Remediation of a Chromium Contaminated Soil: Mechanical Response and Leaching Behavior. Geotechnical and Geological Engineering, 42(5), p.4191. https://doi.org/10.1007/s10706-024-02750-3.
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