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Microbe Encapsulation for Selective Rare-Earth Recovery from Electronic Waste Leachates

Journal Article · · Environmental Science and Technology
Rare earth elements (REEs) are indispensable components of many green technologies and of increasing demand globally. However, refining REEs from raw materials using current technologies is energy intensive and enviromentally damaging. Here, we describe the development of a novel biosorption-based flow-through process for selective REE recovery from electronic wastes. An Escherichia coli strain previously engineered to display lanthanide-binding tags on the cell surface was encapsulated within a permeable polyethylene glycol diacrylate (PEGDA) hydrogel at high cell density using an emulsion process. This microbe bead adsorbent contained a homogenous distribution of cells whose surface functional groups remained accessible and effective for selective REE adsorption. The microbe beads were packed into fixed-bed columns, and breakthrough experiments demonstrated effective Nd extraction at a flow velocity of up to 3 m/h at pH 4–6. The microbe bead columns were stable for reuse, retaining 85% of the adsorption capacity after nine consecutive adsorption/desorption cycles. A bench-scale breakthrough curve with a NdFeB magnet leachate revealed a two-bed volume increase in breakthrough points for REEs compared to non-REE impurities and 97% REE purity of the adsorbed fraction upon breakthrough. These results demonstrate that the microbe beads are capable of repeatedly separating REEs from non-REE metals in a column system, paving the way for a biomass-based REE recovery system.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1631910
Alternate ID(s):
OSTI ID: 1660533
Report Number(s):
LLNL-JRNL--767490; 957967
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 23 Vol. 53; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (64)

Radioactive waste standoff could slash high tech’s supply of rare earth elements journal April 2019
Synthesis and utilization of E. coli-encapsulated PEG-based microdroplet using a microfluidic chip for biological application journal July 2010
Scaling up of silverson rotor–stator mixers journal February 2011
Recent Advances in the Separation of Rare Earth Elements Using Mesoporous Hybrid Materials journal May 2018
Adsorption of mixed metals and cadmium by calcium-alginate immobilized Zoogloea ramigera journal October 1989
Adsorption of rare earth ions onto the cell walls of wild-type and lipoteichoic acid-defective strains of Bacillus subtilis journal June 2012
Interactions of microorganisms with rare earth ions and their utilization for separation and environmental technology journal November 2012
REE Recovery from End-of-Life NdFeB Permanent Magnet Scrap: A Critical Review journal September 2016
Metal adsorption onto bacterial surfaces: development of a predictive approach journal December 2001
Mass transfer in rapidly photopolymerized poly(ethylene glycol) hydrogels used for chemical sensing journal May 2001
Fixed-bed study for lanthanide (La, Eu, Yb) ions removal from aqueous solutions by immobilized Pseudomonas aeruginosa: experimental data and modelization journal April 2002
Release of protein from highly cross-linked hydrogels of poly(ethylene glycol) diacrylate fabricated by UV polymerization journal May 2001
Photopolymerizable hydrogels for tissue engineering applications journal November 2002
Characterization of permeability and network structure of interfacially photopolymerized poly(ethylene glycol) diacrylate hydrogels journal July 1998
Copper biosorption on immobilized seaweed biomass: Column breakthrough characteristics journal January 2007
Recovery of rare earth metals through biosorption: An overview journal October 2013
Removal of trivalent samarium from aqueous solutions by activated biochar derived from cactus fibres journal January 2016
Hydrogels for biomedical applications journal December 2012
Fractal-like kinetics of adsorption on heterogeneous surfaces in the fixed-bed column journal February 2019
Recycling of the rare earth elements journal October 2018
Selective accumulation of light or heavy rare earth elements using gram-positive bacteria journal October 2006
Sorption of lanthanum and erbium from aqueous solution by activated carbon prepared from rice husk journal December 2010
Review on hydrometallurgical recovery of rare earth metals journal October 2016
Removal of heavy metals from industrial wastewater by free and immobilized cells of Aspergillus niger journal September 2010
Recycling of rare earths: a critical review journal July 2013
Biosorption characteristics of Bacillus sp. ATS-2 immobilized in silica gel for removal of Pb(II) journal August 2006
Characterization of metal removal of immobilized Bacillus strain CR-7 biomass from aqueous solutions journal March 2011
Insight into the adsorption kinetics models for the removal of contaminants from aqueous solutions journal May 2017
A critical review on solvent extraction of rare earths from aqueous solutions journal February 2014
Adsorption of rare earth metals: A review of recent literature journal September 2016
Biosorption-a green method for the preconcentration of rare earth elements (REEs) from waste solutions: A review journal January 2019
Rare earth elements as critical raw materials: Focus on international markets and future strategies journal March 2013
Batch and continuous biosorption of chromium(VI) by Rhizopus arrhizus journal October 2007
Economic evaluation of an electrochemical process for the recovery of metals from electronic waste journal April 2018
Selective Extraction of Rare Earth Elements from Permanent Magnet Scraps with Membrane Solvent Extraction journal July 2015
Bioadsorption of Rare Earth Elements through Cell Surface Display of Lanthanide Binding Tags journal February 2016
Recovery of Rare Earth Elements from Low-Grade Feedstock Leachates Using Engineered Bacteria journal November 2017
Recovery of Rare Earth Elements from Geothermal Fluids through Bacterial Cell Surface Adsorption journal June 2019
Rare-Earth Separation Using Bacteria journal March 2016
Enhanced Lithium Ion Transport in Poly(ethylene glycol) Diacrylate-Supported Solvate Ionogel Electrolytes via Chemically Cross-linked Ethylene Oxide Pathways journal January 2017
Application of Freeze-Dried Powders of Genetically Engineered Microbial Strains as Adsorbents for Rare Earth Metal Ions journal September 2016
Cellulose and Saccharomyces cerevisiae Embark To Recover Europium from Phosphor Powder journal January 2019
Techno-economic Assessment for Integrating Biosorption into Rare Earth Recovery Process journal October 2017
Evaluating Rare Earth Element Availability: A Case with Revolutionary Demand from Clean Technologies journal February 2012
Selective Biosorption of Lanthanide (La, Eu, Yb) Ions by Pseudomonas aeruginosa journal February 1999
Hydration Properties and Ionic Radii of Actinide(III) Ions in Aqueous Solution journal August 2013
Investigation of Molecular Transport and Distributions in Poly(ethylene glycol) Hydrogels with Confocal Laser Scanning Microscopy journal February 2005
Bio-derived materials as a green route for precious & critical metal recovery and re-use journal January 2015
From NdFeB magnets towards the rare-earth oxides: a recycling process consuming only oxalic acid journal January 2014
Functionalization of mesoporous materials for lanthanide and actinide extraction journal January 2016
Repurposing bacterial extracellular matrix for selective and differential abstraction of rare earth elements journal January 2018
The mobility of the undissociated citric acid molecule in aqueous solution journal January 1957
Silicon alkoxide cross-linked silica nanoparticle gels for encapsulation of bacterial biocatalysts journal January 2013
Preconcentration of rare earth elements on activated carbon and its application to groundwater and sea-water analysis journal January 1996
Production of monodisperse silica gel microspheres for bioencapsulation by extrusion into an oil cross-flow journal June 2016
Fixed-bed dynamic column adsorption study of methylene blue (MB) onto pine cone journal May 2014
Rare Earths: Market Disruption, Innovation, and Global Supply Chains journal November 2016
Adsorption performance of packed bed column for nitrate removal using PAN-oxime-nano Fe2O3 journal June 2014
Thermodynamics of trivalent actinides and neodymium in NaCl, MgCl2, and CaCl2 solutions: Solubility, hydrolysis, and ternary Ca-M(III)-OH complexes journal August 2009
Biosorption of neodymium on Chlorella vulgaris in aqueous solution obtained from hard disk drive magnets journal April 2017
A Detailed Assessment of Global Rare Earth Element Resources: Opportunities and Challenges journal November 2015
Global Potential of Rare Earth Resources and Rare Earth Demand from Clean Technologies journal October 2017
Social and Environmental Impact of the Rare Earth Industries journal February 2014
Rare Earth Elements: Overview of Mining, Mineralogy, Uses, Sustainability and Environmental Impact journal October 2014

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