An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage
A series of column tests of chromium-contaminated soft soil were performed in lab using self-designed electrokinetic soil flushing apparatus considering temperature. The changes of the current and electrolyte solution pH, and the effects of the type of leaching agent (i.e. sodium dodecylbenzene sulf...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2021-11-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010056 |
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| author | Jiating ZHENG Likui LIU Aihua WANG Yan WANG Ganbin LIU |
| author_facet | Jiating ZHENG Likui LIU Aihua WANG Yan WANG Ganbin LIU |
| author_sort | Jiating ZHENG |
| collection | DOAJ |
| description | A series of column tests of chromium-contaminated soft soil were performed in lab using self-designed electrokinetic soil flushing apparatus considering temperature. The changes of the current and electrolyte solution pH, and the effects of the type of leaching agent (i.e. sodium dodecylbenzene sulfonate, citric acid and oxalic acid), applied voltage and temperature on the removal behavior of chromium were analyzed. The results show that chromium in soil can be removed effectively with the electrokinetic soil flushing method. Compared with the single soil flushing method using sodium dodecylbenzene sulfonate (SDS), the removal ratio of Cr(VI) and Cr(total) can increase to 2.79 and 3.12 times when the voltage of 10 V is applied. When the raising temperature increases to 45 ℃, the removal ratio of Cr(VI) and Cr(total) both are greatly improved as citric acid (CA) and oxalic acid (OA) are leaching agents, while the removal ratio of Cr(total) decreases by 4.25% when using SDS as leaching agent. The group using oxalic acid as leaching agent shows the best removal efficiency, and the removal ratio of Cr(VI) and Cr(total) reach 82.08% and 77.57%, respectively. After remediation, the soil structure has changed, and pores between soil particles become smaller and the soils are more compacted. |
| first_indexed | 2024-04-10T16:45:44Z |
| format | Article |
| id | doaj.art-aa9076cdfdf9471687a5676caa8560dc |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:45:44Z |
| publishDate | 2021-11-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-aa9076cdfdf9471687a5676caa8560dc2023-02-08T01:28:49ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652021-11-0148620621210.16030/j.cnki.issn.1000-3665.202010056202010056An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltageJiating ZHENG0Likui LIU1Aihua WANG2Yan WANG3Ganbin LIU4School of Civil and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, ChinaChina Construction Third Bureua Engineering Design Co. Ltd., Wuhan, Hubei 430074, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, ChinaA series of column tests of chromium-contaminated soft soil were performed in lab using self-designed electrokinetic soil flushing apparatus considering temperature. The changes of the current and electrolyte solution pH, and the effects of the type of leaching agent (i.e. sodium dodecylbenzene sulfonate, citric acid and oxalic acid), applied voltage and temperature on the removal behavior of chromium were analyzed. The results show that chromium in soil can be removed effectively with the electrokinetic soil flushing method. Compared with the single soil flushing method using sodium dodecylbenzene sulfonate (SDS), the removal ratio of Cr(VI) and Cr(total) can increase to 2.79 and 3.12 times when the voltage of 10 V is applied. When the raising temperature increases to 45 ℃, the removal ratio of Cr(VI) and Cr(total) both are greatly improved as citric acid (CA) and oxalic acid (OA) are leaching agents, while the removal ratio of Cr(total) decreases by 4.25% when using SDS as leaching agent. The group using oxalic acid as leaching agent shows the best removal efficiency, and the removal ratio of Cr(VI) and Cr(total) reach 82.08% and 77.57%, respectively. After remediation, the soil structure has changed, and pores between soil particles become smaller and the soils are more compacted.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010056electrokineticscontaminated soft soilchromiumremediationtemperature |
| spellingShingle | Jiating ZHENG Likui LIU Aihua WANG Yan WANG Ganbin LIU An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage Shuiwen dizhi gongcheng dizhi electrokinetics contaminated soft soil chromium remediation temperature |
| title | An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| title_full | An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| title_fullStr | An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| title_full_unstemmed | An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| title_short | An experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| title_sort | experimental study of removal of chromium from contaminated soft soil with the electrokinetic soil flushing method considering temperature and low voltage |
| topic | electrokinetics contaminated soft soil chromium remediation temperature |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010056 |
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