Chemistry

Organic materials can convert toxic heavy metals into harmless forms

Graphical abstract. Credit: Chemical area (2024). Doi: 10.1016/J.chemosphere.2024.143880

A researcher at Wateralu University has discovered that a special form of charcoal absorbs toxic chrome and is very effective to convert it into a more secure form.

Chromium is a heavy metal that exists in two formats. One form, chrome (III), is a safe trace nutrient needed for our body. Another chrome (VI) is a dangerous carcinogen -related substance related to ovaries, lungs, and liver cancer, and is a reproduction problem. Dangerous forms are usually created during industrial processes such as leather sunburn, stainless steel production, and mining, but can also occur naturally in the presence of manganese minerals.

Biacha, a kind of charcoal generated by heating agricultural waste without oxygen, researches as a potential tool for purifying chromium contamination in industrial land using the natural filtration capacity of organic carbon. It is done.

Philip Budmir’s candidate for the Global and Environmental Science at the Dr. Waterloo University wants to know what will happen when the chrome (VI) water is mixed with oak -based biochares. I did it. His research is published in Journal Chemos Fear.

https://www.youtube.com/watch?v=a8r6tkqe308

Organic materials can convert toxic heavy metals into harmless forms. Credit: Canadian light source

Using the Canadian light source at the University of Suscachuwan, Budimir examined the bio -charcoal and checked where the chrome was deposited on the grain and which version of the metal was there. He discovered that only CR (VI) was included in the solution at first, but after sitting for 120 hours (5 days), most chrome (~ 85 %) was CR (III). did. Therefore, bio -charcoal not only absorbed the toxic chromium, but also converted it into a safer shape.

“I was happy to see that most of them were chrome-6, but chrome-3, but we found them with bi-charcoal grain,” Budimir says.

Organic materials can convert toxic heavy metals into harmless forms

The microscope image (a) of the bio-charal grain after reaction with CR (VI) and the μ-XRF map of the same particles indicate CR strength (b). The arrow indicates the area where the μ-xanes data is collected. CR K-edge X-ray absorption μ-XRF maps CR K-eded X-ray absorption (XANES) spectrum (K2CR2O7 and CR2O3) (c) (c) (c). Credit: Chemical area (2024). Doi: 10.1016/J.chemosphere.2024.143880

Researchers have also discovered that the chrome isotope changes (or divide) while removing CR (VI) from water. The light chrome isotope was removed faster, and CR (VI) was easily converted from CR (III) than a heavier isotope. He says that this could be used as a tool for monitoring underground water restoration initiatives using a biasty.

“Things are happening underground, but I don’t know,” says Budimir. “If you test the isotope, you will get an idea of ​​what is happening and whether the process is working.”

Details: Filip budimir et al, oak -based biocher, chrome isotope depression that is removing six -valent chrome by Chemos Fear (2024). Doi: 10.1016/J.chemosphere.2024.143880

Provided by Canada’s light source

Quotation: Organic materials can convert toxic heavy metals into harmless shapes (January 31, 2025) February 1, 2025 https://phys.org/news/2025-01-material-toxic-havy Obtained from -harmless.html

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