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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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