Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation

Borte Kose Mutlu; Beatrice Cantoni; Andrea Turolla; Manuela Antonelli; Heileen Hsu-Kim; Mark R. Wiesner

doi:10.1016/j.cej.2018.05.080

Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation

Borte Kose Mutlu, Beatrice Cantoni, Andrea Turolla, Manuela Antonelli, Heileen Hsu-Kim, Mark R. Wiesner^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

90 Citations (Scopus)

Abstract

This work evaluated nanofiltration (NF) as a potential step in the recovery process of Rare Earth Elements (REEs) from leachates of coal combustion fly ashes. A pre-treatment step, by pH adjustment and microfiltration (MF), has been studied to separate REEs by major elements. The individual and combined effects of applied pressure (12-24 bar) and NF feed acidity (pH 1.5-3.5) on rejection of six critical REEs and permeate flux have been investigated via response surface methodology (RSM). The resulting model equations were used to develop a cost model for the recovery chain, in order to select the optimum NF operating conditions. The optimization of the REE recovery chain, including pre-treatment and NF, was done with respect to the objective of maximizing the difference between NF concentrate economic value and treatment cost. NF with an appropriate MF pre-treatment has been effective in concentrating REEs from fly ash leachate, reaching the maximum potential gain at the optimum operating conditions of 12 bar and pH 3.5.

Original language	English
Pages (from-to)	309-317
Number of pages	9
Journal	Chemical Engineering Journal
Volume	349
DOIs	https://doi.org/10.1016/j.cej.2018.05.080
Publication status	Published - 1 Oct 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Funding

The research was supported by the U.S. Department of Energy under the Project No. DE-FE0026952 and the U.S. National Science Foundation Environmental Engineering program (CBET-1510965). The financial support for Dr. Borte Kose-Mutlu was provided by TUBITAK 2219-International Postdoctoral Research Fellowship Program. The authors thank Ross Taggart for providing coal fly ash leachate, Prof. Dr. Dincer Topacık National Research Center on Membrane Technologies (MEM-TEK) for ZP measurements, and David Dickerson for supplying NP010 and NP030 membranes.

Funders	Funder number
National Science Foundation Environmental Engineering Program	CBET-1510965
TUBITAK
U.S. Department of Energy	DE-FE0026952

Keywords

Coal combustion residues
Cost model
Critical elements
Membrane technology
Response surface methodology

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title = "Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation",

abstract = "This work evaluated nanofiltration (NF) as a potential step in the recovery process of Rare Earth Elements (REEs) from leachates of coal combustion fly ashes. A pre-treatment step, by pH adjustment and microfiltration (MF), has been studied to separate REEs by major elements. The individual and combined effects of applied pressure (12-24 bar) and NF feed acidity (pH 1.5-3.5) on rejection of six critical REEs and permeate flux have been investigated via response surface methodology (RSM). The resulting model equations were used to develop a cost model for the recovery chain, in order to select the optimum NF operating conditions. The optimization of the REE recovery chain, including pre-treatment and NF, was done with respect to the objective of maximizing the difference between NF concentrate economic value and treatment cost. NF with an appropriate MF pre-treatment has been effective in concentrating REEs from fly ash leachate, reaching the maximum potential gain at the optimum operating conditions of 12 bar and pH 3.5.",

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AU - Antonelli, Manuela

AU - Hsu-Kim, Heileen

AU - Wiesner, Mark R.

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Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation

Abstract

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Keywords

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