ORIGINAL RESEARCH
Repairing Compound-Contaminated Soil Using
EK-Laccase Combination Repairing Technology
| 1 | College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, China |
| 2 | Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources,
Wuhan University of Science and Technology, Wuhan, Hubei, China |
CORRESPONDING AUTHOR
Dajun Ren
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, China
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, China
Submission date: 2019-05-02
Final revision date: 2019-08-14
Acceptance date: 2019-08-21
Online publication date: 2020-02-13
Publication date: 2020-03-31
Pol. J. Environ. Stud. 2020;29(3):2403–2411
KEYWORDS
TOPICS
ABSTRACT
Complex soil pollution is a major part of soil pollution, and heavy metals and organic pollutants
coexist in the soil in most cases. With the common pollutants phenol and heavy metals (Cu and Cd)
as the target pollutants, this study investigated the principles and mechanism of electro-kinetic
(EK)-laccase combination technology for repairing contaminated soils by developing an EK repair
device. Additionally, the migration of heavy metals and migration and the degradation of phenol in
complex environments were analyzed. The results showed that the removal efficiency of phenol in soil
with Cd2+ in the cathode region was 27.6% lower than that with Cu2+ in the cathode region, while the
removal efficiency of phenol in the anode region exceeded 90% in both cases. The removal efficiency
of Cd2+ and Cu2+ in the soil were 56.7% and 61.2% respectively. Contaminants such as succinic acid and
p-benzoquinone and catechol in the repaired soil were detected by GC/Ms. In this repairing system, the
degradation of phenol could be either electrocatalytic oxidation or laccase catalytic oxidation.
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