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| Study on Heavy Metals Enrichment Characteristics of Native Tree Species at Antimony Mine Area in Lengshuijiang |
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Received:April 20, 2020
Revised:April 22, 2020
Accepted:April 26, 2020
Published Online:February 22, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.03.013 |
| KeyWord:native tree species; antimony mining area; heavy metal; enrichment characteristics |
| Author | Institution |
| TONG Qi |
贵州省植物园 |
| WANG Chen |
贵州省植物园 |
| HUANG Fengyan |
贵州省植物园 |
| LI Gui |
湖南省林业科学院 |
| CHEN Rui |
湖南省林业科学院 |
| TONG Fang-ping |
湖南省林业科学院 |
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| Abstract: |
| Contents of heavy metals in native tree species and their rhizosphere soils at antimony mining area wasteland in Lengshuijiang were collected and analyzed. Plant’s ability to enrich and transport heavy metals was investigated. The results show that soils in mining area wasteland are highly contaminated by Cd and Sb accompanied with combined pollution of As, Hg and Pb. Cd concentration surpasses national soil pollution risk screening value (GB 15618—2018), while Sb concentration is 104-226 times of soil background value of heavy metals in China. Eight native plants show tolerance to contamination. Catalpa bungei and Cupressus funebris have highest plant’s ability to enrich and transport heavy metals of Hg, Cd and Sb. Broussonetia papyrifera has highest plant’s ability to enrich and transport heavy metals of Pb, Hg, Cd and Sb. Choerospondias axillaris has highest plant’s ability to enrich heavy metals of Hg, Cd and Sb, and lower plant’s ability to transport heavy metals of Cd, Sb. Murraya paniculata, Catalpa ovata, Trachycarpus fortunei and Ligustrum lucidum have higher plant’s ability to enrich and transport heavy metals of Hg, Cd. According to pollution of heavy metals in wasteland, and enrichment and transport coefficient of heavy metals by plant, Cupressus funebris, Catalpa bungei, Choerospondias axillaris and Broussonetia papyrifera are sellected as preferential species of phytoremediation of antimony mining area wasteland. |
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