DOI: 10.1016/j.watres.2019.01.050
Scopus记录号: 2-s2.0-85061577461
论文题名: Membrane electrolysis for the removal of Mg 2+ and Ca 2+ from lithium rich brines
作者: Díaz Nieto C.H. ; Palacios N.A. ; Verbeeck K. ; Prévoteau A. ; Rabaey K. ; Flexer V.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 117
结束页码: 124
语种: 英语
英文关键词: Anion exchange membrane
; Hydrometallurgy
; Magnesium hydroxide
; Raw materials
; Sustainable mining
; Zero-waste
Scopus关键词: Calcium carbide
; Calcium fluoride
; Electrolysis
; Hydrated lime
; Hydrometallurgy
; Ion exchange membranes
; Lithium compounds
; Positive ions
; Raw materials
; Renewable energy resources
; Anion exchange membrane
; Batch electrolysis
; Lithium carbonates
; Magnesium hydroxide
; Membrane electrolysis
; Renewable energy technologies
; Sustainable mining
; Zero waste
; Magnesium compounds
; calcium ion
; hydroxyl group
; lithium salt
; magnesium ion
; alternative energy
; brine
; cation
; chemical compound
; concentration (composition)
; electrokinesis
; experimental study
; fuel cell
; membrane
; mining
; pollutant removal
; waste
; addition reaction
; Article
; concentration process
; controlled study
; current density
; electrochemical analysis
; electrolysis
; limit of detection
; membrane
; precipitation
; priority journal
; South American
英文摘要: Lithium is today an essential raw material for renewable energy technologies and electric mobility. Continental brines as present in the Lithium Triangle are the most abundant and the easiest to exploit lithium sources. Lithium is present in diluted concentrations together with different ions, and it is imperative to fully remove both magnesium and calcium before lithium carbonate can be precipitated. Here we use membrane electrolysis as a novel method to generate hydroxyl groups in situ in a two-chamber electrochemical cell with a side crystallizer, omitting the need for chemical addition and not leading to substantial loss of lithium rich brine. Batch electrolysis experiments fully removed more than 99.99% of both Mg 2+ and Ca 2+ for three different native South-American brines treated at current densities ranging from 27 to 350 A m −2 (final concentrations were below ICP detection limit: < 0.05 mg L −1 ). For a brine containing 3090 mg L −1 of Mg 2+ and 685 mg L −1 of Ca 2+ , 62 kWh m −3 are needed for the full removal of both cations when a current density of 223 A m −2 is employed. Most importantly, the Li + concentration in the brine is not affected. The removed cations are precipitated as Mg(OH) 2 and Ca(OH) 2 . Our process has the potential to simultaneously recover lithium, magnesium, and calcium compounds, minimizing waste production. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121955
Appears in Collections: 气候变化事实与影响
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作者单位: Centro de Investigación y Desarrollo en Materiales Avanzados y Almacenamiento de Energía de Jujuy-CIDMEJu (CONICET-Universidad Nacional de Jujuy), Av. Martijena S/N, Palpalá, 4612, Argentina; Center for Microbial Ecology and Technology (CMET), Faculty of Bioscience Engineering, Ghent University, Belgium; CAPTURE, Coupure Links 653, Ghent, 9000, Belgium
Recommended Citation:
Díaz Nieto C.H.,Palacios N.A.,Verbeeck K.,et al. Membrane electrolysis for the removal of Mg 2+ and Ca 2+ from lithium rich brines[J]. Water Research,2019-01-01