BIODEGRADABLE CHELATE GLDA ENHANCED PHYTOEXTRACTION FOR CADMIUM-CONTAMINATED SOIL

ZHOU Kuan; HUANGFU Zhuo-xi; ZHONG Cheng-wei; DING Ping; XIE Shi-qian; YU Jiang

doi:10.13205/j.hjgc.202105023

Volume 39 Issue 5

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(5): 165-170,79

ZHOU Kuan, HUANGFU Zhuo-xi, ZHONG Cheng-wei, DING Ping, XIE Shi-qian, YU Jiang. BIODEGRADABLE CHELATE GLDA ENHANCED PHYTOEXTRACTION FOR CADMIUM-CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 165-170,79. doi: 10.13205/j.hjgc.202105023

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ZHOU Kuan, HUANGFU Zhuo-xi, ZHONG Cheng-wei, DING Ping, XIE Shi-qian, YU Jiang. BIODEGRADABLE CHELATE GLDA ENHANCED PHYTOEXTRACTION FOR CADMIUM-CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 165-170,79. doi: 10.13205/j.hjgc.202105023

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BIODEGRADABLE CHELATE GLDA ENHANCED PHYTOEXTRACTION FOR CADMIUM-CONTAMINATED SOIL

doi: 10.13205/j.hjgc.202105023

ZHOU Kuan^1,2,3,
HUANGFU Zhuo-xi^1,2,3,
ZHONG Cheng-wei^1,2,3,
DING Ping^1,2,3,
XIE Shi-qian^1,2,3,
YU Jiang^{1,2,3
,
,}

1. College of Architecture and Environment, Sichuan University, Chengdu 610065, China;
2. Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, China;
3. Yibin Institute of Industrial Technology, Sichuan University, Yibin 644000, China

Received Date: 2020-02-19
Available Online: 2022-01-17

Abstract

Abstract

The chelating agent could enhance the absorption of plants for heavy metal in soil. To explore the effect of chelating agent L-glutamic acid N, N-diacetic acid (GLDA) enhanced phytoextraction for cadmium-contaminated soil, a pot experiment was conducted to investigate the influence on applying GLDA for the growth, antioxidant enzyme activities and cadmium accumulation characteristic of Humulus scandens and soil physical, chemical properties. The results showed that when the chelating agent GLDA was applied to 50 mg/kg cadmium-contaminated soil, the biomass, root length and stem length of Humulus scandens significantly decreased by 13.1%~59.1%, 6.6%~26.0% and 6.8%~10.6%, compared with the control group; the activity of the antioxidant enzyme system of Humulus scandens increased first and then decreased, and the content of available cadmium in soil significantly increased by 10.4%~53.8%, compared with the control group. GLDA also significantly increased the accumulation of cadmium in various parts of Humulus scandens, and the best accumulation effect of Humulus scandens, which was 1.29~1.32 times higher than the control group, was achieved at the GLDA concentration of 2.50~3.75 mmol/kg. In general, the best results were obtained at 2.5 mmol/kg. In this case, the cadmium content of underground and ground part were 1.07 and 1.67 times higher than the control group, respectively. Further, the translocation factor, underground bioconcentration factor and aboveground bioconcentration factor of Humulus scandens were 1.00, 1.61 and 1.60, respectively. The above results indicated that the application of GLDA of the appropriate concentration could improve the remediation efficiency of humulus scandens in cadmium-contaminated soil.
- phytoremediation,
- cadmium-contaminated,
- L-glutamic acid N, N-diacetic acid (GLDA),
- Humulus scandens

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