<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>20046</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue>5</issue>
    <volume>45</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2017-06-07</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Identification of the Complete Photodegradation Pathway of Ethylenediaminetetra(methylenephosphonic acid) in Aqueous Solution</title>
    <abstract language="eng">This study aims at investigating the abiotic degradation pathway of&#13;
ethylenediaminetetra(methylenephosphonic acid) (EDTMP) simulated applying UV&#13;
irradiation. The degradation of EDTMP and formation of degradation products was&#13;
determined using LC-MS and ³¹P-NMR. In the laboratory scale experiments, EDTMP was&#13;
degraded within 30 min and the degradation products, iminodi(methylenephosphonic&#13;
acid) (IDMP), ethylaminobis(methylenephosphonic acid) (EABMP), and amino-&#13;
(methylenephosphonic acid) (AMPA), were simultaneously released. IDMP was the&#13;
main degradation product of EDTMP. Therefore, we conclude that the initial cleavage of&#13;
EDTMP is a heterolytically driven process, which starts the degradation process at the&#13;
intramolecular C-N bond. In contrast, the main product of a possible homolytic C-C&#13;
cleavage of methylaminobis(methylenephosphonic acid) could not be confirmed with&#13;
either LC-MS or ³¹P-NMR. Additionally, there was no evidence for a primary attack on&#13;
the C-P bond. All identified degradation products of EDTMP have been mineralized to&#13;
carbon dioxide (CO₂). Three additional degradation products (M1, M2, and M3) have&#13;
been found using the  ³¹P-NMR analysis but have not yet been quantified using LC-MS.&#13;
We assume that the unidentified degradation product M1 is related to m/z 312, M2&#13;
to m/z 341, and M3 to m/z 409. Thus we concluded that EDTMP undergoes photochemical&#13;
conversion to IDMP, the main degradation product. EABMP and AMPA also accumulate,&#13;
but in smaller amounts. All intermediates are further mineralized to CO₂.</abstract>
    <parentTitle language="eng">Clean - soil, air, water : a journal of sustainability and environmental safety</parentTitle>
    <identifier type="doi">10.1002/clen.201500774</identifier>
    <identifier type="issn">1863-0669</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Ramona</firstName>
      <lastName>Kuhn</lastName>
    </author>
    <submitter>
      <firstName>Ramona</firstName>
      <lastName>Kuhn</lastName>
    </submitter>
    <author>
      <firstName>Elisabeth</firstName>
      <lastName>Tóth</lastName>
    </author>
    <author>
      <firstName>Helmut</firstName>
      <lastName>Geppert</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Fischer</lastName>
    </author>
    <author>
      <firstName>Marion</firstName>
      <lastName>Martienssen</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>EDTMP</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>LC-MS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>31P-NMR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Phosphonates</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Photodegradation</value>
    </subject>
    <collection role="institutes" number="2305">FG Biotechnologie der Wasseraufbereitung</collection>
  </doc>
</export-example>
