EFFECT OF ELECTRODE-ORIENTATED ELECTROKINETIC ENHANCEMENT ON PHYTOREMEDIATION ON ARSENIC CONTAMINATED SOIL

ZHOU Li-wei; WANG Hang; LIU Yang-sheng

doi:10.13205/j.hjgc.202010036

Volume 38 Issue 10

Nov. 2020

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ZHOU Li-wei, WANG Hang, LIU Yang-sheng. EFFECT OF ELECTRODE-ORIENTATED ELECTROKINETIC ENHANCEMENT ON PHYTOREMEDIATION ON ARSENIC CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 228-233. doi: 10.13205/j.hjgc.202010036

Citation:

ZHOU Li-wei, WANG Hang, LIU Yang-sheng. EFFECT OF ELECTRODE-ORIENTATED ELECTROKINETIC ENHANCEMENT ON PHYTOREMEDIATION ON ARSENIC CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 228-233. doi: 10.13205/j.hjgc.202010036

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EFFECT OF ELECTRODE-ORIENTATED ELECTROKINETIC ENHANCEMENT ON PHYTOREMEDIATION ON ARSENIC CONTAMINATED SOIL

doi: 10.13205/j.hjgc.202010036

College of Environmental Science and Engineering, Peking University, Beijing 100871, China

Received Date: 2019-05-22

Abstract

Abstract

In this paper, the effect of electrode-orientated electrokinetic enhancement on phytoremediation on arsenic contaminated soil was investigated based on Capsicum annuum L. The results showed that soil pH decreased in the control group and increased in the experimental group. The soil arsenic concentration in the control group decreased from (524.1±5.6) mg/kg to (500.5±8.3) mg/kg, and the soil arsenic concentration in different areas of the experimental group was (179.8±10.6), (674.9±5.43), (512.8±7.3) mg/kg, respectively. Compared with the control group, the amount of arsenic absorbed by plants in the experimental group increased by -18.1%, 282.8% and 170.3%, respectively. The ratio of arsenic concentration in soil and rhizosphere in control group and experimental group 1, 2 and 3 was 2.62, 0.64, 1.48 and 1.26, respectively. The electric field increased the arsenic concentration near plant roots. In the control group and the experimental group, the residue arsenic content of the fifth day was 55.64%, 34.99%, 39.06% and 0%. In the soil of experimental group, and near the cathode on the 5th and 10th day of the control group, the proportions of Fe/Al oxide binding state and residue arsenic in the crystallized water were 67.45%, 0% and 8.88%, respectively. It reflected the activation effect of electric field on soil heavy metal forms. The power consumption of the experimental group for 10 days repairing was RMB 79.5/m³, with considerable economical advantages.
- phytoremediation,
- electrokinetic remediation,
- heavy-metal in soil,
- arsenic

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References(38)

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