Pioneer plants promote soil formation in a mixture of bauxite tailings and red mud.

Autor: Jiang X; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin University of Technology, 541000, Guilin, China., Lin M; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China., Zhang X; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin University of Technology, 541000, Guilin, China., Yu G; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China; Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China., Jiang P; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin University of Technology, 541000, Guilin, China., Liu J; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin University of Technology, 541000, Guilin, China. Electronic address: liujie@glut.edu.cn.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Nov; Vol. 370, pp. 122590. Date of Electronic Publication: 2024 Sep 20.
DOI: 10.1016/j.jenvman.2024.122590
Abstrakt: The disposal of bauxite tailings and red mud is a concern for the sustainable development of the Al industry. Our previous study demonstrated that the disposal of bauxite tailings and red mud as a soil-like matrix (BRM) has great application potential for revegetation after bauxite mining with suitable pioneer species promoting soil formation in the BRM. The present study evaluated the improvement effects of six pioneer plants (Celosia argentea, Bassia scoparia, Suaeda glauca, Melilotus suaveolens, Sorghum sudanense, and Sesbania cannabina) on the physicochemical properties and microbial communities of BRM. The results indicated that the pioneer plants significantly decreased salinity and alkalinity and increased micropore volume, available phosphorus, and organic matter in the BRM (p < 0.05). Furthermore, microbial diversity and network stability in BRM significantly increased after planting pioneer plants. The partial least-squares path model analysis showed that pore structure improvement was most important in the plant promotion of soil formation in BRM. Although all six plants grew well on BRM, C. argentea had the highest shoot biomass and root volume. Compared with other plants, C. argentea increased the micropore volume of BRM. In addition, M. suaveolens showed a greater ability to regulate BRM salinity and alkalinity, resulting in a more significant decrease in the abundance of halophilic bacteria. A comprehensive evaluation based on gray relation analysis indicated that C. argentea and M. suaveolens are suitable pioneer plants for revegetation in BRM disposal areas.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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