Recovery of rare earth elements from acid mine drainage by ion exchange

被引：75

作者：

Felipe, E. C. B. ^{[1
]}

Batista, K. A. ^{[1
]}

Ladeira, A. C. Q. ^{[1
]}

机构：

[1] CDTN, Ctr Dev Nucl Technol, Dept Mineral Technol, Av Antonio Carlos 6627,Campus UFMG, BR-31270901 Belo Horizonte, MG, Brazil

来源：

ENVIRONMENTAL TECHNOLOGY | 2021年 / 42卷 / 17期

关键词：

Cationic resin; batch experiments; isotherms; maximum loading capacity; Langmuir constants; SOLVENT-EXTRACTION; AQUEOUS-SOLUTION; METAL-IONS; ADSORPTION; SEPARATION; BIOSORPTION; CHITOSAN;

D O I：

10.1080/09593330.2020.1713219

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The current work addresses the study of the recovery of rare earth elements (REE) from acid mine water by using cationic exchange resin. The acid water was obtained from a closed uranium mine in Brazil. Ion exchange experiments were carried out in batch with three different resins at 25 +/- 0.5 degrees C and pH values 1.4, 2.4 and 3.4 (natural). Data were adjusted to the Langmuir equation in order to calculate the maximum loading capacity (q(max)) of the resins. The results of q(max) for individual REE revealed that the resins present higher loading for La in detriment to the other REE. The Dowex 50WX8 and Lewatit MDS 200 H resins demonstrated favourable sorption profiles to REE, evidenced by values of equilibrium factor (R-L) and higher values of the Langmuir constants (b). The separation factors () indicates that resins are more selective for light REE at all pH studied. The selectivity of the resins for the REE can be described as light REE > heavy REE. The pH 1.4 and 3.4 are more favourable for the recovery of REE. [GRAPHICS] .

引用

页码：2721 / 2732

页数：12

共 39 条

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