TAO Chenbin, ZHU Yuhang, CHEN Jianjun, et al. Effects of Different Artificial Vegetation Communities on Characteristics of Heavy Metal Loss in Runoff of Lead Zinc Mine Wasteland[J]. 2022, 36(1): 375-383.
DOI:
TAO Chenbin, ZHU Yuhang, CHEN Jianjun, et al. Effects of Different Artificial Vegetation Communities on Characteristics of Heavy Metal Loss in Runoff of Lead Zinc Mine Wasteland[J]. 2022, 36(1): 375-383. DOI: 10.13870/j.cnki.stbcxb.2022.01.048.
Effects of Different Artificial Vegetation Communities on Characteristics of Heavy Metal Loss in Runoff of Lead Zinc Mine Wasteland
This paper studied the effects of different artificial vegetation communities and soil improvement on the characteristics of heavy metal loss in the runoff of lead-zinc mine wasteland
in order to provide early restoration ideas for the ecological restoration of mining wasteland. The runoff plot experiment was used to improve the soil by adding organic fertilizer and calcium fertilizer. Under the condition of natural rainfall
different artificial vegetation communities (grass
shrub grass and tree shrub grass) were constructed on the undisturbed soil and improved soil of lead-zinc mine wasteland respectively. The production of surface runoff
the content and loss of sediment
cadmium
lead and arsenic in runoff were analyzed and studied. The results showed that: (1) In undisturbed soil
the cumulative runoff decreased by 11.3% and 0.8% respectively compared to grass communities and irrigated grass communities. Compared with undisturbed soil
the cumulative runoff of improved soil decreased by 3.2%~18.8% in the same artificial vegetation community. In undisturbed soil
the accumulated sediment of shrub grass community decreased by 28.9% and 14.0% respectively compared with grass community and tree shrub grass community. Compared with undisturbed soil
the cumulative sediment of improved soil decreased by 40.0%~63.3% in the same artificial vegetation community. (2) In undisturbed soil
the cumulative losses of dissolved cadmium
lead and arsenic in different artificial vegetation communities were 2.7~7.2
104.3~295.1 and 1.4~5.4 mg / m2 respectively. Compared with the undisturbed soil
the cumulative losses of dissolved cadmium
lead and arsenic in different artificial vegetation communities decreased by 47.7%~61.0%
43.8%~64.6% and 43.8%~63.8% respectively. (3) In undisturbed soil
the cumulative losses of particulate cadmium
lead and arsenic in different artificial vegetation communities were 2.5~9.0 g/m2
437.5~1 347.2 and 16.2~89.9 mg/m2 respectively. Compared with the undisturbed soil
the cumulative loss of particulate cadmium
lead and arsenic in different artificial vegetation communities decreased by 53.7%~72.0%
55.4%~65.8% and 60.2%~71.1% respectively. (4) The losses of particulate cadmium
lead and arsenic accounted for 99.8%~99.9%
77.1%~84.1% and 85.1%~96.7% of the total loss respectively. In conclusion
the more complex the artificial vegetation community
the lower the runoff
sediment and heavy metal loss. Adding soil amendment could further strengthen the interception function of vegetation community. Under different plant communities
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