摘要
我国是世界最大的稀土生产国、出口国和消费国,但早期无序开发造成了严重的生态危害。为评价离子型稀土矿区生态环境质量,进一步分辨土壤修复优先控制的障碍因子,基于PSR模型提出了离子型稀土矿区土壤生态环境现状评价指标体系,通过层次分析法(AHP)与熵权法确定权重,获得生态环境恢复综合指数(ERI),通过障碍度排序确定障碍因子。以赣南岭北矿区为案例,通过研究发现,开采工艺深度影响场地现状,池浸、堆浸工艺较原地浸矿工艺ERI更低,场地修复障碍因素集中于土壤肥力与存肥保肥能力和土壤结构的相应指标,以期为稀土矿区不同类型污染场地的土壤环境生态修复提供指导。
China is the largest producer,exporter and consumer of rare earths over the world.But the early disordered development caused serious ecological harm.In order to evaluate the ecological environment quality of ion-type rare earth mining area and further identify the obstacle factors of soil remediation priority control,this study proposed an evaluation index system of soil ecological environment status in ionic rare earth mining area based on PSR model.The ecological environment restoration composite index(ERI)was obtained by AHP and entropy weight method.The obstacle factors were determined by the order of obstacle degree.Taking lingbei mining area in Southern Jiangxi province as a case study,it was found that the depth of mining process affected the status of the site,and the ERI of pool leaching and heap leaching was lower than that of in-situ leaching.The obstacle factors of site restoration focus on soil fertility,capacity of fertilizer storage and soil structure.
作者
黄蕾
江磊
黄雨佳
HUANG Lei;JIANG Lei;HUANG Yu-jia(State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University,Nanjing 210023,China)
出处
《环境生态学》
2021年第10期1-5,共5页
Environmental Ecology
基金
国家重点研发计划项目(2019YFC1805100&2020-YFC1807502)
国家自然科学基金(41822709)资助。
关键词
稀土
矿区
生态修复
障碍因素
PSR模型
Rare earth
mining area
ecological restoration
obstacle factors
PSR model
作者简介
黄蕾(1980-),女,江苏常州人,博士,教授,主要研究方向为环境风险评估,E-mail:huanglei@nju.edu.cn。
