摘要
以离子型稀土矿废弃地表层土壤为研究对象,并以未开采区为对照,模拟降雨条件下矿区废弃地不同坡位表层土壤渗滤液稀土元素的分布特征,探讨采矿后土壤中溶解态稀土元素分异。结果表明,矿区土壤在淋溶过程中,渗滤液中稀土含量基本呈现相同的变化趋势,随着淋溶次数的增加而递减。开采区中坡位和下坡位土壤渗滤液中所含的溶解态稀土较高,且稀土元素在淋溶过程配分较为稳定,元素配分曲线较为一致;未开采区各坡位土壤淋溶过程活性较强的稀土优先淋出,在前几次的淋溶过程元素配分曲线呈一定的变化,而后才逐渐稳定,渗滤液中稀土含量相对较低。未开采区的下坡位土壤渗滤液中稀土含量高可能是浸矿过程存在母液渗漏引起。
This study was carried out in abandoned mining area by applying a simulated rainfall method to discover the migration of rare earth elements in the soil from different slope positions. We chose soil of an unmined area as control and examined the differentiation of rare earth elements formed by mining. The obtained results show the rare earth content of the soil leachate in the mining area presented the same change trend, which decreased with the increase of the leaching times during the leaching process. The soil leachate in the middle slope position and downhill position of the mining area contains higher dissolved rare earth, the distribution pattern of rare earth elements during the leaching process is more stable, and the distribution curve is more consistent. The active rare earths elements are preferentially leached out of the soil in unmined area during the leaching process. In the early stage of leaching process, the element distribution curve showed a certain change, and then gradually stabilized. The content of rare earth in the leachate is relatively low, while the higher content of rare earth elements in the soil leachate in the downhill position of the unmined area may be caused by the leakage of leaching liquor during the leaching process.
作者
陈海滨
陈志彪
陈志强
CHEN Hai-Bin;CHEN Zhi-biao;CHEN Zhi-qiang(School of History and Geography,Minnan Normal University,Zhangzhou 363000,China;State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province,Fuzhou 350007,China;School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China)
出处
《稀土》
CAS
CSCD
北大核心
2021年第4期17-26,共10页
Chinese Rare Earths
基金
国家重点研发计划项目(2016YFC0502905)
福建省科技厅高校产学合作项目(2020N5007)
福建省教育厅中青年教师教育科研项目(JAT200292)
闽南师范大学校级教改项目(JG201926)。
关键词
离子型稀土
溶解态
土柱淋溶
元素配分
ionic type rare earth
soluble state
soil column leaching
element distribution
