According to the technology of electric restoration for heavy metal contaminated soil, this paper adjusted the pH value by adding humic acid buffer solution to the cathode region to improve the electro-osmotic drainage effect, and compared the final drainage effect from multiple aspects. The relation between drainage rate and ζ potential was deduced. The results were explained at the points of ζ potential, metal ion and fulvic acid’s complexation to metal ion. The results show that adding humic acid to cathode region cannot increase the drainage accumulation, and soft clay with high humic acid concentration is not suitable for large-scale electro-osmotic drainage and consolidation.
ZHOU Jian, GAN Qiyun, QIAN Wei, CAO Yun
. Tests on the Influence on Electro-Osmotic Effect of Drainage by
Adding Humic Acid Buffer Solution to the Cathode Region[J]. Journal of Shanghai Jiaotong University, 2020
, 54(3)
: 239
-246
.
DOI: 10.16183/j.cnki.jsjtu.2020.03.003
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