Deng Lijuan, Yin Min, Yang Shuanglin, Wang Xiaoyun, Chen Juan, Miao Deren, Yin Genshen, Zhai Shuhua, Su Yuan, Wu Cheng, Ren Zhen
College of Agronomy and Life Sciences, Kunming University, Kunming, China.
School of Medicine, Yunnan University, Kunming, China.
Front Plant Sci. 2025 Feb 24;16:1528723. doi: 10.3389/fpls.2025.1528723. eCollection 2025.
This study aimed to identify suitable plants for remediating metal pollution in copper tailing soil and supporting ecological reclamation in Dongchuan, Yunnan, focusing on three major mining regions: Tangdan, Yinmin, and Lanniping.
The Nemerow comprehensive pollution index was employed to evaluate the metal contamination levels, and the enrichment and transfer capacities of the dominant plants for Cd, Cu, Pb, and Zn were analyzed to identify remediation candidates.
The findings revealed severe pollution in the copper tailing soil, with Cu as the primary pollutant, and with a pollution rate of 77.778%. A total of 96 plant species from 42 families and 87 genera were recorded, including 29 dominant species across 17 families and 26 genera, with herbs comprising 62.068% of the dominant types. Among the tested plants, , , , and exhibited significantly higher metal enrichment and transfer capacities, rendering them for ecological restoration. with the highest comprehensive membership function score of 5.298 was identified as the preferred species for ecological restoration in the Dongchuan Cu tailing area. Correlation analysis revealed a positive relationship between the metal content in underground plant parts and both the total metal content and organic matter (OM) in the rhizosphere soil, whereas a negative correlation was observed with soil pH.
The soil in the Dongchuan Cu tailing area is severely contaminated by metals, mainly Cu. Among the identified plants, S. balfouriana emerged as the most suitable candidate for metal accumulation. This study establishes a comprehensive theoretical framework for the application and promotion of phytoremediation technology in the Dongchuan copper tailings area.
本研究旨在确定适合修复云南东川铜尾矿土壤中金属污染并支持生态复垦的植物，重点关注汤丹、因民和滥泥坪三个主要矿区。
采用内梅罗综合污染指数评估金属污染水平，分析优势植物对镉、铜、铅和锌的富集与转移能力，以确定修复候选植物。
研究结果表明铜尾矿土壤污染严重，主要污染物为铜，污染率达77.778%。共记录到42科87属96种植物，其中17科26属有29种优势植物，优势类型中草本植物占62.068%。在所测试的植物中，[此处原文缺失植物名称]表现出显著更高的金属富集和转移能力，使其适合用于生态修复。综合隶属函数得分最高达5.298的[此处原文缺失植物名称]被确定为东川铜尾矿区生态修复的首选物种。相关分析表明，地下植物部分的金属含量与根际土壤中的总金属含量和有机质（OM）均呈正相关，而与土壤pH呈负相关。
东川铜尾矿区土壤受到金属严重污染，主要是铜污染。在所鉴定的植物中，[此处原文缺失植物名称]成为金属积累最合适的候选植物。本研究为东川铜尾矿区植物修复技术的应用和推广建立了全面的理论框架。
