PHYTOREMEDIATION POTENTIAL OF FIVE NATIVE PLANTS IN SOILS CONTAMINATED WITH LEAD IN A MINING AREA

LU Nan; WEI Yang; LI Yan

doi:10.13205/j.hjgc.202211019

Volume 40 Issue 11

Nov. 2022

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LU Nan, WEI Yang, LI Yan. PHYTOREMEDIATION POTENTIAL OF FIVE NATIVE PLANTS IN SOILS CONTAMINATED WITH LEAD IN A MINING AREA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 134-142. doi: 10.13205/j.hjgc.202211019

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LU Nan, WEI Yang, LI Yan. PHYTOREMEDIATION POTENTIAL OF FIVE NATIVE PLANTS IN SOILS CONTAMINATED WITH LEAD IN A MINING AREA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 134-142. doi: 10.13205/j.hjgc.202211019

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PHYTOREMEDIATION POTENTIAL OF FIVE NATIVE PLANTS IN SOILS CONTAMINATED WITH LEAD IN A MINING AREA

doi: 10.13205/j.hjgc.202211019

LU Nan^1,2,3,4,5,
WEI Yang^1,2,3,4,5,
LI Yan^1,2,3,4,5

1. Shaanxi Land Engineering Construction Group Co., Ltd, Xi'an 710075, China;
2. Joint Technology Innovation Center for Land Engineering and Human Settlements of Shaanxi Land Engineering Construction Group Co., Ltd. and Xi'an Jiaotong University, Xi'an 712000, China;
3. Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xi'an 710075, China;
4. Shaanxi Land Consolidation Engineering Technology Research Center, Xi'an 710075, China;
5. Institute of Land Engineering and Technology, Shaanxi Land Engineering Construction Group Co., Ltd, Xi'an 710075, China

Received Date: 2022-01-10
Available Online: 2023-03-24

Abstract

Abstract

Metal pollution in soils is an issue of global concern, and lead (Pb) pollution is considered to be the most serious type. In this study, five native crops[wormwood (Artemisia capillaris), dandelion (Taraxacum mongolicum), alfalfa (Medicago sativa), sauce (Lxeris chinensis), and plantain (Plantago asiatica L.)] that grow naturally around the tailings slag in a mining area in Northwest China were selected to test their ecological restoration impacts on Pb-contaminated soil. In pot experiments, different metal lead pollution gradients (0, 2‰, 3‰, and 5‰, w/w) were set, the changes of soil Pb content in different tissues and organs before and after planting were analyzed. The results showed that wormwood and plantain were suitable for planting under various soil Pb pollution levels, and the removal rate was 12%~32%. The accumulation of Pb in the roots of plantain and the stems of dandelion was more advantageous than in other plants, up to 3617,720 mg/kg respectively. These two crops had great potential as remediation plants for soil Pb pollution. The content of microbial biomass carbon in rhizosphere soil was 2.37%~13.89% higher than that in bulk soil. The catalase activity of rhizosphere and bulk soil was inhibited by soil Pb, which was 0.44%~22.3% lower than that of the control, and the catalase activity of rhizosphere soil was 0.89%~8.09% higher than that of bulk soil. The results can provide a theoretical basis for phytoremediation and soil environmental quality evaluation of Pb contaminated wasteland in mining areas.
- lead contaminated soil,
- phytoremediation,
- accumulation,
- catalase activity,
- microbial biomass carbon

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References(48)

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