I D
× COMMENTARYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

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
Avoiding SIL Misconceptions
Engineers must refine their foundational understanding of process safety in order to avoid common misconceptions about safety instrumented systems, including…
Industrial Lighting Safety
LED lighting can provide a safer alternative to conventional high-pressure sodium, and fluorescent lighting fixtures in industrial settings In many…

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
Improving chemical production processes with IIoT and AI technologies
New filtration technology for highly corrosive media
PTA production: Lowering OPEX without compromising on quality
Sure that zero means zero in your zero-liquid discharge (ZLD) process?
How separation processes profit from Industrial Internet of Things (IIoT) solutions

View More

Live chat by BoldChat