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- Title
Remediation of cadmium contaminated soil using electrokinetic-phytoremediation system with rotary switching electrodes.
- Authors
Fan, Li; Yuan, Qin; Lu, Qiuyuan; Zheng, Chunli; Su, Ruijing; Liu, Nuo; Wu, Jun
- Abstract
Considering both electrokinetic remediation and phytoremediation have limitations, an electrokinetic phytoremediation (EP) system was constructed to obtain efficient and environmentally friendly remediation results. This study indicates that the electric field can promote the absorption of Cd by ryegrass with little impact on soil physicochemical properties under the condition of rotary switching electrodes, and the accumulation of Cd in the aboveground and underground parts of ryegrass increased by 145.2% and 93.7%, respectively. The DC electric field combined with ryegrass under rotary switching electrode mode proved to be the optimal condition for the remediation of Cd contaminated soil with a remediation efficiency of 66.7%. Moreover, the rotary switching of the electrodes alleviated the suppression of the growth of ryegrass by the DC electric field. During the EP remediation process, the electric field promoted the transformation of the residue state of Cd to the other forms, which accelerated the desorption rate of Cd from the soil and facilitated the migration of Cd into plants. In conclusion, EP is a green and efficient remediation technology for heavy metal contaminated soil with good application prospects.
- Subjects
SOIL remediation; HEAVY metals removal (Sewage purification); ELECTRIC fields; RYEGRASSES; PHYTOREMEDIATION
- Publication
Environmental Geochemistry & Health, 2024, Vol 46, Issue 10, p1
- ISSN
0269-4042
- Publication type
Article
- DOI
10.1007/s10653-024-02162-5