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Authors Lin, H; Jiang, XY; Li, B; Dong, YB; Qian, L
Author Full Name Lin, Hai; Jiang, Xinyi; Li, Bing; Dong, Yingbo; Qian, Ling
Title Soilless revegetation: An efficient means of improving physicochemical properties and reshaping microbial communities of high-salty gold mine tailings
Source ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Language English
Document Type Article
Author Keywords Soilless revegetation; Gold mine tailings; Physicochemical properties; Microbial metabolic activity; Microbial community structure
Keywords Plus SP NOV.; BIOLOGICAL-PROPERTIES; PLANTS; NUTRIENTS; NITROGEN; LITTER; CARBON
Abstract Soilless revegetation is a cost-effective and eco-friendly method for the ecological restoration of gold mine tailings. However, due to gold mine tailings are high-salty, alkaline and low-nutrient, little research has been done on soilless revegetation of gold mine tailings. The aim of study was to apply soilless revegetation to gold mine tailings, and investigate the changes of physicochemical properties and microbial communities of tailings after soilless revegetation. Six selected herbaceous plants (Melilotus officinalis, Xanthium sibiricum, Festuca elata, Zoysia japonica, Amaranthus tricolor L., Artemisia desertorum) grew well on the bare tailings, and their heights reached as high as 16.28 cm after 90 days. After soilless revegetation, tailings salinity dramatically dropped from 547.15 to 129.24 mu S cm(-1), and pH went down from 8.68 to 7.59 at most. The content of available phosphorus (AP), available nitrogen (AN) and organic matter (OM) in tailings gradually improved, especially the content of AP and OM increased 53.36% and 52.58%, respectively. Furthermore, microbial metabolic activity and diversity in tailings obviously increased 70.33-264.70% and 1.64-13.97% respectively. The relative abundance of potential plant growth-promoting bacteria increased 1.40-3.05%, while the relative abundance of opportunistic pathogens and halophilic bacteria decreased 10.58-17.03% and 2.98-6.52% respectively. Such variations of microbial communities were beneficial for tailings restoration. This study provided insight into soilless revegetation and its impact on tailings microorganisms, which could be a new strategy for ecological restoration of gold mine tailings.
Author Address [Lin, Hai; Jiang, Xinyi; Li, Bing; Dong, Yingbo; Qian, Ling] Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China; [Lin, Hai; Jiang, Xinyi; Li, Bing; Dong, Yingbo] Beijing Key Lab Resource Oriented Treatment Ind P, Beijing 100083, Peoples R China; [Qian, Ling] Sino Japan Friendship Ctr Environm Protect, Beijing 100029, Peoples R China
Reprint Address Li, B (corresponding author), Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China.
E-mail Address libing@ustb.edu.cn
Funding Agency and Grant Number National Key R&D Program of China [2018YFC0604604]; Open Fund of National Engineering Laboratory for Site Remediation Technologies, China [NEL-SRT201706]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [FRF-TP-19-019A2]
Funding Text This work was financially supported by the National Key R&D Program of China (2018YFC0604604), Open Fund of National Engineering Laboratory for Site Remediation Technologies, China (No.NEL-SRT201706) and Fundamental Research Funds for the Central Universities (FRF-TP-19-019A2).
Publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
Publisher City SAN DIEGO
Publisher Address 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
ISSN 0147-6513
29-Character Source Abbreviation ECOTOX ENVIRON SAFE
ISO Source Abbreviation Ecotox. Environ. Safe.
Publication Date JAN 1
Year Published 2021
Volume 207
Article Number 111246
Digital Object Identifier (DOI) 10.1016/j.ecoenv.2020.111246
Page Count 9
Web of Science Category Environmental Sciences; Toxicology
Subject Category Environmental Sciences & Ecology; Toxicology
Document Delivery Number OV8PA
Unique Article Identifier WOS:000592463500009
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