I D
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Nanofiltration Toray Industries, Inc. (Tokyo, Japan; www.toray.com) has created what…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment Environment, Health, Safety & Security

Tiny Fe-Ni batteries accelerate soil decontamination

By Chemical Engineering Editorial Staff |

Soil contaminated with chlorinated aliphatic compounds can be remediated ten times faster than with biological or iron-based methods by use of a new metallic powder developed by Tosoh Corp. (Tokyo; edlinks.chemengonline.com/6514-532). The powder, called MA-FN20, electrochemically strips the chlorine atoms from the pollutants, producing soluble chloride ions and volatile organic compounds (VOCs), which can then be recovered by conventional methods. MA-FN200 is a powder composed of 50–100-µm particles of iron with 0.3 wt.% nickel. The nickel is present as small spots on the iron particles, and the particles act like tiny batteries when introduced into moist soil. The iron serves as the anode, liberating electrons when Fe metal is oxidized to Fe+2, and the nickel spot works as the cathode, refducing chlorinated aliphatic hydrocarbons (with water) into Cl– (and OH–) ions and VOCs. The MA-FN200 reducing agent is simply dispersed into soil, onsite, in doses of about 1–3 wt.%, and the little batteries do their work during a period of 3–14 days, depending on the temperature (between 5 and 30°C). The process completely decomposes chlorinated aliphatic hydrocarbons, including tetrachloroethylene, trichloroethylene…
Related Content
Addressing water scarcity
The threat of water scarcity may not be a top concern for those who have readily available freshwater to meet…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
How separation processes profit from Industrial Internet of Things (IIoT) solutions
Up to 80% increased production rates in plastic recycling
Higher throughput and purity in sodium bicarbonate production with up to 15% less energy consumption
Help feeding nations with chemical filtering technologies
Not at the forefront of Industry 4.0?

View More

Live chat by BoldChat