复合功能菌群应用于铁尾矿生态改良及修复

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Abstract Addressing the drawbacks of iron-based tailings, such as high salinity and alkalinity, low nutrient content, poor water retention, and difficulty in effective utilization, this study utilize the functional microbial system to improved and restored the ecological function of iron tailings, and alfalfa was chosen as the pioneer plant to study the effect of the composite flora on the improvement and restoration of iron tailings by analysing the growth indexes of the plants. Results from pot experiments indicated that the average height of alfalfa in the treatment groups increased by 63.99% compared with the control group, with a decrease in tailings pH and a significant increase in nutrient elements such as urease enzyme activity, catalase enzyme activity and effective phosphorus. Microbial diversity analysis revealed that the abundance of nitrogen-fixing related microbial groups, such as the Nitrospirae, increased by approximately one-fold compared to the untreated groups. Therefore, the functional microbial system has the potential to regulate the acidity of iron tailings, provide nutrients to promote plant growth, increase the abundance of sterol bacteria microbial communities, enhance metabolic capabilities and nitrogen-fixing potential, and contribute to rehabilitate of iron tailings.

Key words： functional microbial Fe ore tailings rehabilitation

Received: 01 August 2024

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X75

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	LIU Nuo
	WANG Xiao-ya
	LIU Hai-long
	ZHENG Chun-li

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LIU Nuo,WANG Xiao-ya,LIU Hai-long等. Eco-engineering of Fe ore tailings into soil using sludge and functional microbial system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(2): 1045-1051.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I2/1045

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