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| Impact of Iron Tailings on Soil Environment and Ecological Restoration and Degradation Measures |
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Received:March 25, 2020
Revised:April 03, 2020
Accepted:April 09, 2020
Published Online:January 29, 2021
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| DOI： |
| KeyWord:iron tailings; road works; soil environment；ecological restoration degradation |
| Author | Institution |
| wangxuwang |
Shangluo University |
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| Abstract: |
| The utilization of iron tailings has changed the agricultural soil environment along the road during the construction of the pavement, by measuring the mineral composition, radioactivity, content of harmful substances and the content of soil and stone powder of the raw materials of iron tailings, the yellow brown soil in the Qinba district for the affected objects, according to the most unfavorable total immersion diffusion analysis method, the influence of road mixture with 80% iron tailings on the heavy metal content of yellow brown soil was analyzed, and measures for ecological restoration and degradation were proposed.The results show that the content of sulfide and sulfate in iron tailings does not meet the requirements for concrete road use. The content of sulfide and sulfate should be controlled within 0.5% when preparing concrete; the activity of radioactive Ra-226, Th-232, and K-40 The concentration meets the requirements of the main materials of construction and the decoration materials, and the content of harmful substances and the content of soil and stone powder meets the requirements of fine aggregates for road use. ; Using urban sludge, industrial fly ash, humic acid, attapulgite, bentonite to bioremediation agricultural soil pollution along the iron tailings road and replacing iron tailings with sand greater than 6.4% can meet national agricultural use The requirements of ground soil environmental quality standards can be used as environmentally friendly road building materials after the above treatments. |
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