Rhubarb root extract helps sunlight clean dye-polluted water
Zebari AJ, Omer KM, Qasim AK
Phytoremediation
The same wild rhubarb species foragers prize for its tart stalks is showing a second life: its roots can grow pollution-fighting nanomaterials that use plain sunlight to clean contaminated water.
Researchers took root extract from Rheum ribes, a wild rhubarb relative, and used it to grow tiny mineral particles made of nickel, zinc, and iron oxide, no harsh chemicals needed. When sunlight hits these particles, they generate reactive molecules that break apart a blue dye pollutant in water, clearing nearly all of it within a few hours, and the particles can be reused several times without losing their punch.
Key Findings
Zn/Fe co-doping lowered the band gap of NiO nanoparticles to about 2.8 eV, boosting visible-light absorption
The co-doped nanocatalyst degraded 95% of methylene blue dye within 4 hours under natural sunlight, far outperforming undoped NiO
The catalyst retained its performance across four reuse cycles with no noticeable activity loss
chevron_right Technical Summary
Scientists used extract from Rheum ribes (a wild rhubarb) roots to grow a nickel oxide nanomaterial doped with zinc and iron, creating a catalyst that uses sunlight to break down a common dye pollutant in water, clearing 95% of it in four hours.
Abstract Preview
Original paper
In-situ green synthesis of Zn/Fe co-doped NiO nanocatalysts using Rheum ribes root extract for band-gap engineering and enhanced solar-light-driven photocatalytic degradation of methylene blue.
In-situ green co-doping synthesis offers a sustainable and efficient route for tailoring the structural, optical, and catalytic properties of nanocatalysts, enabling enhanced charge separation, ban...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
OsELP Mediated Apoplastic Sequestration in Roots Acts as an Arsenic Filter, L...
Rice you eat regularly — including white rice, rice flour, and baby rice cereals — absorbs arsenic from soil and water, and this discovery reveals a natural ...
Rheum ribes, the Syrian rhubarb or currant-fruited rhubarb, or warty-leaved rhubarb, is an edible wild rhubarb species in the genus Rheum. It grows between 1000 and 4000 m on dunite rocks, among stones and slopes, and is now distributed in the temperate and subtropical regions of the world, chief...