I am trying to remove nitrate from a solution containing 1000 ppm and 10 ppm of nitrate(NO3-N) and chlorate(ClO3). Do you have any suggestions about how to do that?
Sen more technical data:
- source/type of water [groundwater or wastewater]
- where chlorate comes from its origin, auto or allochtonous!
- Why do you want ClO3 not change! limitations and boundaries
- What type of treatment process you are applying? what for is the treated water suitable?
- Is this a lab or pilot scale unit?
- What other water characteristics you know? BOD, COD or TOC, alkalinity, pH ...etc.
There are many methods for Nitrate removal from solution like biological, physical and chemical.
Use specialty Nitrate Removal Resin for the same, it will not effect chlorate.
Use Zero Valent Iron Powder.. It can remove nitrates by reducing nitrates to ammonium ions
Hello Phani
You are right about ZVI reducing Nitrates but i also know that it is used for reductive dechlorination of chlorinated organic compounds....don't you think it'll affect the chlorate by reducing it to chloride ions?
hi, what is your research about? Mine is on removal of chlorates. If you check, you will find that corates are toxins and it may be better toi remove it if your waste stream is going to the waterways. Chlorates are reducing agents, so it may affect stability of other chemicals in your orocess or your research.
dear sir,madam
I'm geotechnical engineer no medical engineer.don't have any knowledge base.
I agree with Mr Vishu Vishali, u coulld remove nitrate by ion exchange.
Ion exchange is the most frequently used treatment technology for nitrate removal. This technology removes nitrate ions from the aqueous phase by replacing them with the anion present in the ion exchange resin. As contaminated water is passed through the resin, contaminant ions are exchanged for other ions, most often chlorides in the resin. Alternatively, nitrate-selective resins may also be used. The advantages of ion exchange are simple operation; the process is independent of temperature, can be automated, and is essentially unaffected by varying nitrate concentrations.
i am doing this experiment on a lab scale....The problem i have found with most of the technologies mentioned above, is that most of these mechanisams also remove chlorate while removing nitrate...so i am back at square one...
the method i have decided to test on a lab scale, is to reduce nitrate with the aid of elemental Al...from what i have read, it looks the nitrate reduction reactions tries to reach equilibirum, before the chlorate can be reduced...
It seems as if the main issue you are having is that nitrate is one of very few ions that hardly form any precipitates...The best you can probably do is to look for reactions that are specific to nitrate and do not affect chlorate. That's all i can think of right now.
Nitrate reducing bacteria properly have a hig selectivity for nitrate compared to chlorate. Many groups of bacteria can utilise nitrate as oxidant as replacement for oxygen. If you establish a biofilm based filter you just feed them a little bit of a soluble organic chemical like methanol to work as the reducing agent. The product from the nitrate reduction will be N2 so you do not need to be concerned with the byproducts from the reaction.
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