Resource Abundance Weekly Review 2026-09-23
Week In Review
The dominant theme of the week was the conversion of waste streams into feedstocks. A Worcester Polytechnic Institute team won a five-year National Science Foundation award to pull rare earth elements out of coal ash, red mud, and mine tailings by borrowing the mild-condition chemistry that diatoms and sponges use to process silicon. Washington University engineers showed that lignin left over from paper production can replace half the petroleum precursor in carbon fiber while still meeting automotive strength standards. The Korea Railroad Research Institute demonstrated a mobile plant that turns discarded concrete railway sleepers into steel, aggregate, and sound-absorbing blocks, and University of Arkansas food scientists made antimicrobial packaging film from rice bran, an agricultural byproduct. Even a pollutant became a resource: University of Michigan chemists reported an iron catalyst that uses light to turn nitrate runoff back into ammonia fertilizer.
A second thread was the replacement of energy-hungry or solvent-heavy incumbents with gentler alternatives. Chinese researchers at the Dalian Institute of Chemical Physics ran a pilot that couples alkaline electrolysis with vacuum distillation so waste heat from hydrogen production desalinates seawater, reporting a 250-kilowatt system that delivers both hydrogen and fresh water and leaves a brine suitable for recovering salt, bromine, and uranium. Oregon State chemists patented a water-based precipitation process that separates zirconium from hafnium roughly five times more efficiently than the organic-solvent extraction used by the only two U.S. plants that do this work today. In construction, the University of Stuttgart load-tested a timber-concrete composite floor slab that matches reinforced concrete in thickness and stiffness with roughly two-thirds less concrete, and North Carolina State University used plasma coatings to make wood-derived cellulose nanofibril films water-resistant enough for packaging.
Rounding out the week, the University of Gothenburg reported the first synthesis of diamondiyne, a porous carbon allotrope predicted 35 years ago that forms without the high pressures diamond requires. It is a reminder that the materials palette itself is still expanding, and that abundance comes not only from recycling what we have but from discovering structures that were not previously available at all.
Taken together, these items describe an economy in which the boundary between waste and raw material is dissolving. Landfilled ash, pulping liquor, rail infrastructure, crop residue, and fertilizer runoff are each being treated as ore bodies, while the processes that refine them are shedding solvents, heat, and pressure. That combination, cheaper inputs and cheaper processing, is what turns a laboratory result into a durable increase in what society can afford to build.
Items
Pilot System Couples Seawater Desalination With Hydrogen Production
Producing hydrogen by electrolysis needs clean water, and the coasts where renewable electricity is cheapest often have only seawater. Running electrolyzers directly on seawater corrodes electrodes, so most designs desalinate first, which costs energy. Researchers at the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, led by Prof. Deng Dehui and Associate Prof. Liu Yanting, report in Nature Energy a system that dissolves the problem by treating electrolysis waste heat as the desalination energy source.
Their “seawater to hydrogen and fresh water” design pairs conventional alkaline water electrolysis with low-temperature vacuum distillation. Electrolyzers run warm, and that heat, normally discarded, drives the distillation of seawater into the fresh water the electrolyzer then consumes. The loop is self-feeding once started.
The numbers come from real hardware rather than models. A 20-kilowatt pilot ran stably for 100 days, producing 3.8 normal cubic meters of hydrogen and 1.2 kilograms of fresh water per hour. A scaled 250-kilowatt system generated 48 normal cubic meters of hydrogen and 31.6 kilograms of fresh water hourly. Because the electrolyzer no longer needs a separate desalination step, the team reports a 14.4 percent improvement in electrical efficiency over conventional alkaline electrolysis fed with fresh water alone.
The concentrated brine left behind is not simply waste. The researchers note it is suitable for recovering salt, bromine, and uranium, positioning the plant as a resource-recovery platform rather than a single-product factory. For coastal regions with abundant wind or solar power and scarce fresh water, a system that makes fuel and water from the same seawater is a meaningful step toward energy and water abundance together.
Source: TechXplore
Water-Based Process Separates Zirconium and Hafnium With Fivefold Higher Efficiency
Zirconium and hafnium are chemical near-twins that occur together in nature and are notoriously hard to pull apart. The separation matters because nuclear reactors need zirconium cladding that is essentially hafnium-free, while hafnium is essential in semiconductors. Industry currently does the job with solvent extraction, a process that consumes millions of pounds of flammable organic solvent each year at the only two U.S. facilities that perform it, with roughly 4 percent of that solvent lost to the atmosphere.
Chemists Alex Roseborough and May Nyman at Oregon State University’s College of Science have patented an alternative that works entirely in water. Reporting in the Journal of the American Chemical Society, they combine natural zirconium containing hafnium impurities with thiocyanate ligands, which bind to the metal ions, and choline, an inexpensive and nontoxic food additive. The mixture precipitates the two metals selectively rather than partitioning them between liquid phases.
The measured separation factor is 33, compared with the industrial standard of 6 to 7, which the team describes as roughly fivefold higher efficiency. The process also runs at low energy and avoids organic solvents entirely, removing both a fire hazard and a pollution source.
The authors frame the work as a demonstration that precipitation-based separations can compete with solvent extraction more broadly. If that holds for other difficult metal pairs, it points toward a cleaner and cheaper way to refine the critical materials that carbon-free electricity, including nuclear power, depends on.
Source: Phys.org
NSF Backs Bio-Inspired Recovery of Rare Earths From Industrial Waste
The United States has large quantities of rare earth elements sitting in plain sight, locked inside coal ash landfills, aluminum-refining red mud, and mine tailings. Worcester Polytechnic Institute cites an estimate of 11 million tons of rare earths trapped in U.S. coal ash landfills, valued at 8.4 billion dollars, nearly eight times the nation’s current raw domestic reserves. The obstacle is that conventional extraction uses harsh acids and high temperatures that make these dilute sources uneconomic.
A new five-year project, funded by a 3.3 million dollar award from the National Science Foundation’s Growing Convergence Research program, aims to change the economics by copying biology. Lead investigator Mingjiang Tao, with co-investigators Carrick Eggleston and Yan Wang, will study how diatoms, sea sponges, and plants process silicon under mild conditions and apply those mechanisms to breaking down silicon-rich waste and liberating the metals inside.
The team spans biology, geochemistry, materials science, metallurgy, and artificial intelligence, with collaborators at George Mason University, UC San Diego, UMass Amherst, and the University at Buffalo. A distinctive goal is whole-material utilization, meaning the residue left after extracting rare earths should itself become a useful product rather than a new waste stream.
This is a research program rather than a finished technology, so results are years away. But it exemplifies a shift in how critical mineral security is being pursued: rather than opening new mines, the fastest route to supply may be treating existing waste as ore and inventing the gentle chemistry needed to process it.
Source: EurekAlert!
Paper-Industry Waste Yields Stronger, Lower-Carbon Carbon Fiber
Carbon fiber makes vehicles lighter and more efficient, but it is expensive and carbon-intensive because it is spun from polyacrylonitrile, a petroleum-derived polymer. Lignin, the woody polymer that paper mills remove from pulp in enormous quantities, has long been proposed as a cheaper, renewable substitute. Fibers made with it have historically fallen short on strength.
Engineers at Washington University in St. Louis, led by Joshua Yuan with postdoctoral scholar Weiwei Li as first author, report in the journal Matter a way around that limitation. They replace up to 50 percent of the polyacrylonitrile with lignin and add single-walled carbon nanotubes that act, in their description, like rebar. The nanotubes template the alignment of crystal structures as the fiber forms, restoring the strength that lignin alone would sacrifice.
The three-step process builds the nanotube template, wet-spins the fiber with tension-assisted heat treatment, and then carbonizes it. The result meets automotive-industry strength standards at a 25 percent reduction in production cost, along with substantial cuts in carbon emissions from replacing half the petroleum input with a waste product.
Yuan says the approach “allows us to create renewable carbon fiber that reaches the high standard of quality used in automobile manufacturing.” Beyond cars, the team points to aerospace, wind turbine blades, and sporting goods. Turning a pulping byproduct into a structural material of this grade is precisely the kind of substitution that makes advanced materials abundant rather than niche.
Source: TechXplore
Timber-Concrete Floor Slab Matches Reinforced Concrete With Two-Thirds Less Concrete
Floor slabs are among the most concrete-intensive elements of a building, and timber alternatives have struggled to match their thinness and stiffness over long spans. Researchers at the University of Stuttgart’s Institute for Computational Design and Construction and Institute of Building Structures and Structural Design, led by Achim Menges, Jan Knippers, and Hans Jakob Wagner, have now load-tested a system they call UniversalTimberSlab that closes that gap.
The demonstrator measures 9 by 5 meters with spans of 8 by 4 meters and is 36 centimeters thick, the same as a comparable reinforced concrete slab. Under a 20 metric ton test load it deflected a maximum of 12 millimeters, and its natural frequency exceeded 8 hertz, which the team reports as above the standard required for multistory buildings. It achieves this with roughly 67 percent less reinforced concrete than a conventional slab.
The system uses prefabricated glued-laminated timber segments arranged with a patent-pending segmentation method and designed with AI-assisted digital tools. Because it is point-supported on columns rather than resting on load-bearing walls, it allows flexible floor layouts suited to mixed-use buildings. Compared with traditional timber floor systems it reduces structural height by 30 to 70 centimeters, which the researchers say can shrink facade area by up to 20 percent.
A pilot building, the 1,400 square meter Zukunftsforum in Oberkochen, Germany, is in planning. If the performance holds in practice, the approach offers a way to keep the compactness and open plans that developers expect from concrete while cutting the embodied carbon and material demand of one of construction’s heaviest components.
Source: TechXplore
Mobile Plant Recycles Railway Concrete Sleepers On Site
Railways replace concrete sleepers, the cross-ties that hold rails in place, in steadily growing volumes, and the discarded blocks are awkward to transport and hard to reuse because the recovered aggregate contains impurities. The Korea Railroad Research Institute has demonstrated a mobile system that processes them where they come out of the track.
In a field demonstration on May 13, 2026 near Gimyujeong Station in Chuncheon, the system crushed waste sleepers and separated them into reinforcing steel and aggregate. The research, led by Lee Jae-young of the institute’s Transportation Environmental Research Department and published in the Journal of Material Cycles and Waste Management, was supported by a national basic research project on waste reduction and recycling for railway facilities running from 2022 to 2024.
The notable step is what happens to the aggregate. Rather than attempting the extensive cleaning that would be needed to return it to structural concrete, the team converts it into sound-absorbing blocks using only particle-size sorting and a minimal addition of binder. Prototype acoustic blocks were shown for use in transport facilities and buildings, and pilot installations at railway stations are scheduled for the second half of 2026 to evaluate their acoustic performance.
“Our goal is to reduce carbon emissions through resource circulation by recycling the continuously growing volume of waste concrete sleepers,” the institute said. The project illustrates a pragmatic form of circularity: matching a low-grade recovered material to an application where its impurities do not matter, and doing the processing at the point of removal.
Source: TechXplore
Plasma Coatings Make Plant-Fiber Films Viable as Plastic Packaging Replacements
Cellulose nanofibril films, made from renewable wood pulp, are fully biodegradable and naturally block oxygen and grease, which makes them attractive substitutes for the multilayer plastic used in chip bags and candy wrappers. That plastic cannot be recycled and fragments into microplastics in landfills. The weakness of cellulose films has been water: they absorb it readily and lose their barrier properties.
Researchers at North Carolina State University, including Nathalie Lavoine, report in Applied Surface Science that dielectric barrier discharge plasma can apply protective coatings that control exactly how the films interact with moisture. One coating cut liquid water absorption to less than 1 percent. An alternative coating did the opposite, increasing water vapor permeability for specialized applications where breathability is wanted.
“This research provides a practical strategy for turning natural plant and tree fibers into functional, water-resistant packaging,” Lavoine said. Because plasma treatment is a dry, surface-level process, it preserves the bulk properties of the film and avoids the solvent baths used in many coating methods.
The team is candid about what remains before industrial use: coating speed, energy consumption, physical durability under real-world handling, and, for food packaging specifically, eliminating unwanted water vapor permeability. Still, the result addresses the single largest barrier to replacing an unrecyclable class of plastic with a material grown from trees.
Source: Phys.org
Rice Bran Becomes Antimicrobial, Biodegradable Food Packaging
Rice bran, the outer layer stripped from grains during milling, is produced in vast quantities and mostly used as low-value animal feed. Food scientists at the University of Arkansas’s Agricultural Experiment Station, led by Assistant Professor Mahfuzur Rahman, have turned proteins extracted from it into biodegradable packaging film that actively suppresses foodborne bacteria.
The key step is treating the film with cold plasma generated from argon gas. The treatment works through two mechanisms: it raises microscopic spikes on the film surface, and it generates hydrogen peroxide, a strong oxidizing agent with antimicrobial properties. Rice bran protein films showed a 3.3-fold increase in surface roughness after treatment, compared with a 1.06-fold increase for films made from whole bran.
Tested against E. coli, Staphylococcus aureus, and an antibiotic-resistant strain of Pseudomonas aeruginosa, the treated films reduced bacterial populations within 8 hours and inhibited growth for at least 24 hours afterward. Untreated films, by contrast, allowed significant bacterial growth. The work was funded by the Arkansas Biosciences Institute.
Together with the North Carolina State cellulose work reported the same week, this study shows plasma treatment emerging as a versatile tool for upgrading bio-based films. Packaging that is made from agricultural waste, degrades after use, and extends the shelf life of the food inside addresses plastic pollution and food waste in a single material.
Source: Phys.org
Light-Driven Iron Catalyst Turns Nitrate Pollution Back Into Fertilizer
Nitrogen fertilizer that washes off farmland into rivers, lakes, and groundwater feeds algal blooms and contaminates drinking water. Nitrate is also chemically stubborn, which is why it accumulates. University of Michigan chemists led by Nathaniel Szymczak report in Nature Chemistry an iron-based catalyst that breaks nitrate down, and in one mode converts it into ammonia that could be reused as fertilizer.
The design places hydrogen-bonding groups in a “secondary sphere” around an iron center. These groups do not react with nitrate directly but grip it in a way that distorts its bonds and primes it for reduction. “Just by having well-positioned hydrogen bonds, you can actually change the bonding structure in nitrate and force a subsequent reduction step,” the researchers explain.
The complex operates along two pathways depending on the energy input. Driven by heat, it converts nitrate to nitric oxide, a molecule with medical uses. Driven by light, it strips the oxygen away entirely and produces ammonia, closing a loop from pollutant back to nutrient.
The authors are clear that this is fundamental chemistry and that practical use in wastewater treatment plants is years away. What it establishes is a design principle: iron, the most abundant transition metal, can be coaxed into difficult reductions by engineering its surroundings rather than its core. That principle could apply to a range of persistent pollutants beyond nitrate.
Source: Phys.org
Diamondiyne: A Porous Carbon Allotrope Predicted 35 Years Ago Is Finally Made
Carbon’s known allotropes, diamond, graphite, graphene, nanotubes, and fullerenes, differ in how the atoms bond. Diamondiyne, proposed in theory 35 years ago, would arrange carbon as corner-connected tetrahedra linked through triple bonds, giving it diamond’s tetrahedral geometry with open pores running through it. No one had succeeded in synthesizing it until now.
A team led by Professor Karl Börjesson at the University of Gothenburg, with collaborators at Stockholm University and Chalmers University of Technology and first author Yizhou Yang, report the synthesis in Angewandte Chemie International Edition. Electron microscopy confirmed repeating crystalline order across regions measuring about 10 nanometers on a side. The material is the first three-dimensional carbon allotrope with mixed sp and sp3 bonding to be created synthetically.
A striking practical feature is that diamondiyne forms without the extreme pressures needed to make diamond. That makes it accessible through ordinary chemical synthesis rather than high-pressure apparatus, which matters for any future scale-up.
The immediate significance is scientific: a decades-old prediction confirmed and a new region of carbon’s structural map opened. But porous, rigid carbon frameworks are exactly the kind of material sought for gas storage, separation, and catalysis, and a new one made under mild conditions widens the toolkit available for those resource-efficiency applications.
Source: Phys.org