I am in need of information about the various experimental methods to
find out the compounds that are getting formed during the degradation
of phenol. Is there any site that is clearly describing all the
experimental methods, reagents required and so on. Thanx in advance.

Hello Karthikgt,

You asked about sites which clearly describe the compounds formed
during the degreation of phenol.

First of all, here's a site which outlines the toxicology of phenol. 
I know this isn't precisely what you are looking for, but you will
find a contact number at the bottom for more information on phenol. 
The site is: http://www.atsdr.cdc.gov/ToxProfiles/phs8920.html

Second, here is a site on the specifics of phenol degredation from the
University of Minnesota.  Explore the links on this page for more
information on phenol degredation than you can shake a stick at.  The
site is: http://umbbd.ahc.umn.edu/phe/phe_map.html

I hope this helps, and good luck.

Leslie

References:
Public Health Statement for Phenol :
http://www.atsdr.cdc.gov/ToxProfiles/phs8920.html
Phenol Pathway : http://umbbd.ahc.umn.edu/phe/phe_map.html

---

Request for Answer Clarification by karthikgt-ga on 19 May 2002 06:39 PDT

Thanx for ur reply. But I am in need of information about the
identification of phenol degradation using hydrogen peroxide as an
oxidant. Currently I don't have HPLC in my lab. So if possible, can
you enlighten me about various titrometric methods to identify &
quantify the intermediates that are getting formed during the
degradation of phenol.

---

Clarification of Answer by leslie-ga on 19 May 2002 20:14 PDT

Hello Karthikgt, 

I found this research paper on-line, and I think it may be closer to
your needs.

Heterogeneous photocatalytic oxidation of water pollutants :
http://www.kfki.hu/~cheminfo/mkf/phd2/ilisz.html

There is a link for an english translation in the top right corner. 
If this does not provide all the information you require, simply
request a further clarification, and I will consult an expert at one
of my local universities.  Thanks for your patience, and it is a
pleasure to work on such a challenging question.

Regards,

Leslie

---

Request for Answer Clarification by karthikgt-ga on 19 May 2002 20:59 PDT

Hi Leslie,
     I want to clarify you that I am in need of various experimental
methods ( only experimental methods) to quantify the intermediate
compunds that are getting formed during the hydrogen peroxide
oxidation of phenol. I hope now it is clear for you to provide me a
solution.

Regards,
Karthik.

Got to increase the time.

Hello Karthikgt,

Bear with me, I'm going to try and bring you the exact information you
require.  It may take me a bit.  Thanks for your patience.

Regards,

Leslie

Hello Karthikgt,

I am going to need to speak to some of the chemistry experts in my
area.  I will warn you, this will take some time, so if you are in a
rush, this might not be your best option.  Thanks for your patience,
and if anyone else wants to take a crack at this one, be my guest.

Thanks.

Leslie

Hello karthik-ga
           The experimental methods you seek regarding oxidation of
phenol by hydrogen peroxide and other oxidants (ozone)
can be found at www.photobiology.com/IUPAC98/esplugas/phenol.html.This
deals with the oxidation of phenol in an aqueous
solution by H2O2.These reactions are fast and also pH dependent.I
think the progress of reaction could be monitored by routine
iodometric titration.The initial concentration of H2O2 being known,the
amount of H2O2 being consumed can be measured by titrating    trating
intervals a sample of the reaction mixture at regular intervals by
iodometric methods.(Iodine/Na2S2O3).I am assuming that your reaction
mixture
contains only phenol initially, before reaction with H2O2.The reaction
can be deemed complete when the H2O2 concentration
remains constant for 2-3 titrations.
           Oxidations with H2O2 is carried out by Fenton's reagent
,which is H2O2 and Fe(as FeSO4).These reactions are also marked by
characteristic colour changes which may be used to monitor the
reaction progress.The sites which are important are
www.iwaponline.com/wst/03504/wst035040103.htm
www.h2o2.com/application/industrialwastwater/fentonsreagent.html
www.h2o2.com/intro/interferences.html
The referencesare 
Water Science and Technology  Vol 35,No4,pp103-110---Wet oxidation of
phenol by H2O2.
Industrial and Engineering Chemistry-process Design and Development  
Vol7,pp1110-17,Year 1968--Bishop D.F
Accounts of Chemical Research Vol 8,pp125-131,Year 1975--"Fenton's
Reagent Revisited"
Best Luck