Plate Nº 84 · recorded October 10, 2026
Chemistry & MaterialsReported finding
One gram of MOF powder pulls half a gram of lead from water
A copper-based MOF grabs 490 mg of lead and over 330 mg of rare earth metals per gram, pairing water cleanup with resource recovery, per Nature Protocols.
By Priya Raman3 min read645 words
In brief
- One gram of a copper-based MOF captured 490 mg of lead, 264 mg of cadmium and 226 mg of manganese.
- The same material adsorbed 335–351 mg per gram of rare earth elements including neodymium, yttrium and dysprosium.
- The protocol was published in Nature Protocols in 2026 (DOI: 10.1038/s41596-026-01425-y).
- Some MOFs have internal surface areas up to 7,000 square meters per gram.
- Tests included alkaline wastewater (pH ~8.5), artificial seawater and e-waste-derived samples.
One gram of a copper-based metal-organic framework can capture nearly half a gram of lead — 490 milligrams — from contaminated water, while also locking up rare earth elements such as neodymium and yttrium at rates above 330 mg/g. Researchers from IIT Gandhinagar, the University of Cambridge and the University of Birmingham published the protocol in Nature Protocols (2026, DOI: 10.1038/s41596-026-01425-y).
The work tackles two water problems at once. Industrial discharge introduces toxic metals like lead, cadmium, nickel and manganese into rivers and lakes. At the same time, discarded electronics — broken lenses, dead earphones, defunct phones — carry valuable rare earth elements (REEs) that end up dissolved in waste streams. Rare earth elements are metals used in magnets, superconductors, optics and batteries, and recovering them from water is difficult once the devices break apart.
What did the researchers build?
The team developed a protocol around metal-organic frameworks (MOFs) — materials riddled with microscopic pores that give them enormous internal surface area. Some MOFs reach up to 7,000 square meters per gram: a pinch of powder with the surface area of a football field. The researchers tune chemical sites inside the pores so they latch selectively onto target metals, much like hooks on a fishing net picking specific fish.
Dhruv Menon, a BTech graduate of IITGN and now a doctoral student in Cambridge's Department of Chemical Engineering and Biotechnology, said: "For me, the most interesting aspect was observing the MOF in our protocol demonstrate substantial adsorption capacities."
The measured numbers, from one gram of the copper-based MOF:
- Lead: 490 mg captured
- Cadmium: 264 mg
- Manganese: 226 mg
- Neodymium: 351 mg
- Yttrium: 343 mg
- Terbium: 337 mg
- Europium: 345 mg
- Dysprosium: 335 mg
How does it beat conventional treatment?
Traditional water treatment relies on precipitation (letting heavy impurities settle), coagulation (making impurities clump) and flocculation (merging small clumps into separable clusters). These methods only work well within narrow pH ranges and produce large volumes of sludge — a thick, muddy waste requiring disposal. Electrochemical treatment avoids some of this but carries high economic and environmental costs.
Adsorption, in which contaminants stick to a tailored surface, works at low contaminant concentrations and can remove 90–99% of target metals. The researchers say adsorption-based approaches generate no secondary contaminants, and the adsorbent materials can be regenerated and reused. MOFs stand out here because their structure offers exceptional design flexibility for capturing and recovering metals.
Does it survive real wastewater?
Lab batch experiments are one thing; real effluent is another. Industrial wastewater — the discharge from manufacturing, mining and chemical processing — contains many metals at once, plus pesticides, detergents and organic pollutants. So the team tested the protocol under deliberately harsh conditions: alkaline wastewater at pH roughly 8.5, turbid and high in dissolved solids. They also validated it in artificial seawater and in samples derived from electronic waste.
The published workflow provides a framework for designing, characterizing and deploying MOFs for water remediation and circular resource use, and the authors say it can transfer to similar adsorbents and other contaminants.
What are the limitations?
The researchers are candid that these are preliminary steps toward deployment. Superb Misra, Jibaben Patel Chair Professor in the Department of Materials Engineering at IITGN and principal investigator of the Bio Nano Materials Group, cautioned: "Controlled batch experiments cannot fully predict behaviors in complex wastewater. There is a need to look at factors like large-scale fabrication, cost analyses, MOF life-cycle assessment and regulatory testing."
In other words, nobody has yet shown the material works economically at industrial scale, and its full environmental footprint — from synthesis to disposal — still needs assessment.
The study's co-authors include Prathmesh Bhadane (IITGN PhD, now a postdoctoral fellow at IIT Bombay), Priya Mahato and Prateek Goyal (IITGN), Iseult Lynch (University of Birmingham) and Swaroop Chakraborty (NERC Fellow, University of Birmingham).
via Phys.org Chemistry (Source)
More from Priya Raman
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Senior reporter covering industry trends and analytics at SciBeat.
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