Decolourization of an Azo Dye by Heterogeneous Photocatalysis
The decolourization of the azo dye Acid Orange 7 was investigated using a heterogeneous photocatalysis which comprised irradiating aqueous solutions of the dye with UV light at a wavelength of 254 nm in the presence of either (TiO 2 + ZnO) mixture, [ ( Ti O 2 + ZnO ) / S 2 O 8 2 − + or [(TiO 2 + ZnO...
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| Veröffentlicht in: | Process safety and environmental protection 2007-11, Vol.85 (6), p.515-520 |
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| creator | Sadik, W.A. |
| description | The decolourization of the azo dye Acid Orange 7 was investigated using a heterogeneous photocatalysis which comprised irradiating aqueous solutions of the dye with UV light at a wavelength of 254
nm in the presence of either (TiO
2
+
ZnO) mixture,
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
+
or [(TiO
2
+
ZnO)/Ag
2SO
4] at a pH of 6.1. It was observed that the dye decolourization was enhanced using
UV
/
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
]
and UV/[(TiO
2
+
ZnO)/Ag
2SO
4] catalytic systems over UV/(TiO
2
+
ZnO) alone. Also, it can be seen that increasing the concentration of oxidant (Na
2S
2O
8 or Ag
2SO
4) added to (TiO
2
+
ZnO) mixture led to a higher rate of dye decolourization. Electrical energy per order (EE/O) was proposed to assess the relative performance of each catalytic system used. It was found that EE/O decreases with increasing the concentration of Na
2S
2O
8 and Ag
2SO
4. |
| doi_str_mv | 10.1205/psep06070 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_31728416</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0957582007714593</els_id><sourcerecordid>31728416</sourcerecordid><originalsourceid>FETCH-LOGICAL-c335t-e3bc10878c97f5884b2579f55898d3acc29956789289d1a05d30497a58fc323d3</originalsourceid><addsrcrecordid>eNqFkLFOwzAURS0EEqUw8AeZkBgCz3Zc2wND1RaKVAkGmC3XeQGjNA52ipR-PYEiJiSmt5x3de8h5JzCFWUgrtuELUxAwgEZUVkUORdaHZIRaCFzoRgck5OU3gCAMklH5GaOLtRhG_3Odj40Wagy22TTXcjmPWbrPltihzG8YINhm7LH19AFZztb98mnU3JU2Trh2c8dk-fbxdNsma8e7u5n01XuOBddjnztKCipnJaVUKpYMyF1JYTSquTWOaa1mEilmdIltSBKDoWWVqjKccZLPiYX-9w2hvctps5sfHJY1_a7leFUMlXQyb_goEiALtQAXu5BF0NKESvTRr-xsTcUzJdJ82tyYPmexWHih8dokvPYOCx9RNeZMvg_vj4Bb393Ag</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>20550948</pqid></control><display><type>article</type><title>Decolourization of an Azo Dye by Heterogeneous Photocatalysis</title><source>Elsevier ScienceDirect Journals Complete</source><creator>Sadik, W.A.</creator><creatorcontrib>Sadik, W.A.</creatorcontrib><description>The decolourization of the azo dye Acid Orange 7 was investigated using a heterogeneous photocatalysis which comprised irradiating aqueous solutions of the dye with UV light at a wavelength of 254
nm in the presence of either (TiO
2
+
ZnO) mixture,
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
+
or [(TiO
2
+
ZnO)/Ag
2SO
4] at a pH of 6.1. It was observed that the dye decolourization was enhanced using
UV
/
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
]
and UV/[(TiO
2
+
ZnO)/Ag
2SO
4] catalytic systems over UV/(TiO
2
+
ZnO) alone. Also, it can be seen that increasing the concentration of oxidant (Na
2S
2O
8 or Ag
2SO
4) added to (TiO
2
+
ZnO) mixture led to a higher rate of dye decolourization. Electrical energy per order (EE/O) was proposed to assess the relative performance of each catalytic system used. It was found that EE/O decreases with increasing the concentration of Na
2S
2O
8 and Ag
2SO
4.</description><identifier>ISSN: 0957-5820</identifier><identifier>EISSN: 1744-3598</identifier><identifier>DOI: 10.1205/psep06070</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>azo dye ; decolourization ; persulphate ; silver sulphate ; TiO 2 + ZnO</subject><ispartof>Process safety and environmental protection, 2007-11, Vol.85 (6), p.515-520</ispartof><rights>2007 The Institution of Chemical Engineers</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c335t-e3bc10878c97f5884b2579f55898d3acc29956789289d1a05d30497a58fc323d3</citedby><cites>FETCH-LOGICAL-c335t-e3bc10878c97f5884b2579f55898d3acc29956789289d1a05d30497a58fc323d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0957582007714593$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids></links><search><creatorcontrib>Sadik, W.A.</creatorcontrib><title>Decolourization of an Azo Dye by Heterogeneous Photocatalysis</title><title>Process safety and environmental protection</title><description>The decolourization of the azo dye Acid Orange 7 was investigated using a heterogeneous photocatalysis which comprised irradiating aqueous solutions of the dye with UV light at a wavelength of 254
nm in the presence of either (TiO
2
+
ZnO) mixture,
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
+
or [(TiO
2
+
ZnO)/Ag
2SO
4] at a pH of 6.1. It was observed that the dye decolourization was enhanced using
UV
/
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
]
and UV/[(TiO
2
+
ZnO)/Ag
2SO
4] catalytic systems over UV/(TiO
2
+
ZnO) alone. Also, it can be seen that increasing the concentration of oxidant (Na
2S
2O
8 or Ag
2SO
4) added to (TiO
2
+
ZnO) mixture led to a higher rate of dye decolourization. Electrical energy per order (EE/O) was proposed to assess the relative performance of each catalytic system used. It was found that EE/O decreases with increasing the concentration of Na
2S
2O
8 and Ag
2SO
4.</description><subject>azo dye</subject><subject>decolourization</subject><subject>persulphate</subject><subject>silver sulphate</subject><subject>TiO 2 + ZnO</subject><issn>0957-5820</issn><issn>1744-3598</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkLFOwzAURS0EEqUw8AeZkBgCz3Zc2wND1RaKVAkGmC3XeQGjNA52ipR-PYEiJiSmt5x3de8h5JzCFWUgrtuELUxAwgEZUVkUORdaHZIRaCFzoRgck5OU3gCAMklH5GaOLtRhG_3Odj40Wagy22TTXcjmPWbrPltihzG8YINhm7LH19AFZztb98mnU3JU2Trh2c8dk-fbxdNsma8e7u5n01XuOBddjnztKCipnJaVUKpYMyF1JYTSquTWOaa1mEilmdIltSBKDoWWVqjKccZLPiYX-9w2hvctps5sfHJY1_a7leFUMlXQyb_goEiALtQAXu5BF0NKESvTRr-xsTcUzJdJ82tyYPmexWHih8dokvPYOCx9RNeZMvg_vj4Bb393Ag</recordid><startdate>20071101</startdate><enddate>20071101</enddate><creator>Sadik, W.A.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TV</scope><scope>C1K</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20071101</creationdate><title>Decolourization of an Azo Dye by Heterogeneous Photocatalysis</title><author>Sadik, W.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c335t-e3bc10878c97f5884b2579f55898d3acc29956789289d1a05d30497a58fc323d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>azo dye</topic><topic>decolourization</topic><topic>persulphate</topic><topic>silver sulphate</topic><topic>TiO 2 + ZnO</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sadik, W.A.</creatorcontrib><collection>CrossRef</collection><collection>Pollution Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Process safety and environmental protection</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sadik, W.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Decolourization of an Azo Dye by Heterogeneous Photocatalysis</atitle><jtitle>Process safety and environmental protection</jtitle><date>2007-11-01</date><risdate>2007</risdate><volume>85</volume><issue>6</issue><spage>515</spage><epage>520</epage><pages>515-520</pages><issn>0957-5820</issn><eissn>1744-3598</eissn><abstract>The decolourization of the azo dye Acid Orange 7 was investigated using a heterogeneous photocatalysis which comprised irradiating aqueous solutions of the dye with UV light at a wavelength of 254
nm in the presence of either (TiO
2
+
ZnO) mixture,
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
+
or [(TiO
2
+
ZnO)/Ag
2SO
4] at a pH of 6.1. It was observed that the dye decolourization was enhanced using
UV
/
[
(
Ti
O
2
+ ZnO
)
/
S
2
O
8
2
−
]
and UV/[(TiO
2
+
ZnO)/Ag
2SO
4] catalytic systems over UV/(TiO
2
+
ZnO) alone. Also, it can be seen that increasing the concentration of oxidant (Na
2S
2O
8 or Ag
2SO
4) added to (TiO
2
+
ZnO) mixture led to a higher rate of dye decolourization. Electrical energy per order (EE/O) was proposed to assess the relative performance of each catalytic system used. It was found that EE/O decreases with increasing the concentration of Na
2S
2O
8 and Ag
2SO
4.</abstract><pub>Elsevier B.V</pub><doi>10.1205/psep06070</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0957-5820 |
| ispartof | Process safety and environmental protection, 2007-11, Vol.85 (6), p.515-520 |
| issn | 0957-5820 1744-3598 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_31728416 |
| source | Elsevier ScienceDirect Journals Complete |
| subjects | azo dye decolourization persulphate silver sulphate TiO 2 + ZnO |
| title | Decolourization of an Azo Dye by Heterogeneous Photocatalysis |
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