Denitrators

No, it doesn't. You are basically arguing that you start out with NO3 and
H2O
and it goes

No I am not arguing that.




2NO3 & 2H2O ---- 2NO2 & 2H2 ---- 2N01 & 2H2 ---- N2 & 2H2O.

The water molecules are never broken up.

Very good! When did I write water molecules were broken up?

They just pass through when the system is functioning properly.

Still wrong. Water is produced here. 2NO3 + 12H+ ---- N2 + 6H2O

This is an enzymatic reaction involving nitrate reductase. The process is
called DENITRIFICATION. O2 is NOT produced!

Read for yourself:
http://en.wikipedia.org/wiki/Denitrification
http://www.reefscapes.net/articles/a...ogencycle.html

When water molecules do get stripped of their oxygen, the hydrogen usually
combines with sulfur to produce hydrogen sulphide.

What? When did I mention water molecules getting stripped of oxygens?

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.

In the post that you quoted, he did not say that oxygen
was produced

Neither did I. When did I write O2 was produced? Read this again: NO3
goes to N2 and H2O. No O2 is produced in this process (denitrification).

, yet you said that he was wrong, and now you are trying to prove yourself
right by adding stuff that was not in the post that you quoted.

I am supporting my argument that I had from the very beginning by providing
a web site link as support.

Wayne reread my posts.

I said from the VERY beginning that NO3 goes to H2O and N2. Never did I
write O2 was produced.

You wrote I was wrong from the beginning.

Who do you think is right now Wayne?

You must feel pretty silly?

Hehehehe. Lol lol lol.

lol

"Stoutman" [email protected] wrote in message ...
LOL this is a reef newsgroup, not a fish only newsgroup.

That's right, I have a FOWLR tank, nevertheless,
my comments are still applicable.

Oh, now it is clear. This group is about REEF tanks.
Let's go back to the subject when you will have a reef tank.

NO3 is not split into N2 and O2 it is broken down enzymatically into N2
and H2O.

No, it's not. The oxygen is removed by bacteria, releasing the nitrogen.


The oxygens are removed from NO3- and released to the 'system' in the form
of H2O not O2 as you stated earlier. This should give you a clue: Why
would anaerobic bacteria that thrive in low O2 environments produce O2?
Don't you think this would be counter productive to there survival?

I will write this again for the umpteen time. This process is called
DENITRIFICATION. It is an enzymatic process that converts NO3- into H2O and
N2 (O2 is NOT produced). The process involves anaerobic bacteria that
contain the enzyme nitrate reductase (among others involved in
denitrification).


O2 is NOT produced.

No, it's not. The oxygen is removed by bacteria, releasing the nitrogen.

What do you think happens to the oxygen that is "removed" by the bacteria?

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.

In the post that you quoted, he did not say that oxygen
was produced, yet you said that he was wrong, and now you are trying to
prove yourself right by adding stuff that was not in the post that you
quoted.


Patterson wrote this very early on:"I don't know how they work, but the goal
is to turn the nitrates (NO3) into
gaseous nitrogen and oxygen."

Gaseous nitrogen and oxygen to 'me' mean O2 and N2. Do you STILL think he
is right?

I will write it again so there is no confusion:
2NO3- + 12H+ --- 6H2O and N2

If you are confused where the H+ come from let me know.

In order for the NO3 to give us N2 and H2O, wouldn't you need free H+
ions roaming around?

No. This process (denitrification) happens at an enzymatic/cellular
(anaerobic bacteria) level. The H+ come from general acids (protonated
amino acid residues, i.e. histidines) within the enzyme(s) involved.


Free hydrogen reacts pretty strongly with O2 if I
remember my chemistry correctly. Or does the free O-- released from the
NO3 pull the 2 H+ ions off the H2O and release the O2 molecule? But why
would the H+ ions do that?

Actually at the enzymatic level (nitrate reductase) it is OH- that forms
(not O--) and this quickly picks up a proton (H+) from neighboring general
acids to produce H2O.

LOL you keep turning your statements around, and when you
quote me, you deliberately leave off important parts of
the previous post in your quote to cover your tracks.

Wayne Sallee
Wayne's Pets



Stoutman wrote on 9/16/2006 4:31 PM:
In the post that you quoted, he did not say that oxygen
was produced

Neither did I. When did I write O2 was produced? Read this again: NO3
goes to N2 and H2O. No O2 is produced in this process (denitrification).

, yet you said that he was wrong, and now you are trying to prove yourself
right by adding stuff that was not in the post that you quoted.

I am supporting my argument that I had from the very beginning by providing
a web site link as support.

Wayne reread my posts.

I said from the VERY beginning that NO3 goes to H2O and N2. Never did I
write O2 was produced.

You wrote I was wrong from the beginning.

Who do you think is right now Wayne?

You must feel pretty silly?

Hehehehe. Lol lol lol.

lol

Wayne what statements of MINE have I turned around?

Give one.

Yes o2 is not produced, but even when he reposted
correctly you keep saying that he is wrong, when he
corrected himself by removing the o2 part, yet you still
claim he is wrong, and then when you are questioned about
it, you keep going back to the o2 thing, even though his
corrected post did not mention o2.

Wayne Sallee
Wayne's Pets



Stoutman wrote on 9/16/2006 4:43 PM:
NO3 is not split into N2 and O2 it is broken down enzymatically into N2
and H2O.
No, it's not. The oxygen is removed by bacteria, releasing the nitrogen.


The oxygens are removed from NO3- and released to the 'system' in the form
of H2O not O2 as you stated earlier. This should give you a clue: Why
would anaerobic bacteria that thrive in low O2 environments produce O2?
Don't you think this would be counter productive to there survival?

I will write this again for the umpteen time. This process is called
DENITRIFICATION. It is an enzymatic process that converts NO3- into H2O and
N2 (O2 is NOT produced). The process involves anaerobic bacteria that
contain the enzyme nitrate reductase (among others involved in
denitrification).


O2 is NOT produced.