KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2 PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2
Photooxidation of As(III) catalyzed by TiO2 has been studied. The photooxidation process was carry out in a closed reactor equipped with UV lamp, by stirring and irradiating a mixture of 5 mg/L As(III) solution and 5 mg TiO2 powder for a certain period of time. In the present work, the effect of exp...
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| Format: | Thesis |
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[Yogyakarta] : Universitas Gadjah Mada
2012
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| _version_ | 1826045647078293504 |
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| author | , Agrippina Wiraningtyas , Dr. rer. nat Nurul Hidayat Aprilita, M.Si. |
| author_facet | , Agrippina Wiraningtyas , Dr. rer. nat Nurul Hidayat Aprilita, M.Si. |
| author_sort | , Agrippina Wiraningtyas |
| collection | UGM |
| description | Photooxidation of As(III) catalyzed by TiO2 has been studied. The
photooxidation process was carry out in a closed reactor equipped with UV
lamp, by stirring and irradiating a mixture of 5 mg/L As(III) solution and 5 mg
TiO2 powder for a certain period of time. In the present work, the effect of
exposure time, As(III) concentration, solution pH and the presence of citric acid
on the photooxidation effectiveness of As(III) catalyzed by TiO2 have been
evaluated. The effectiveness of the oxidized As(III) was presented as %
oxidized As (III), that was calculate by substracting the initial As(III)
amount with unoxidized one. The concentration of unoxidized As(III) was
determined using toulidine blue complexing agent by mean of UV-visible
spectrophotometry method.
The results showed that the use of 5 mg TiO2 could increase the
photooxidation effectiveness of 5 mg/L As(III) from 35.38% to 95.38%,
which was initiated by adsorption process. The photooxidation effectiveness
of As(III) increased with the longer the exposure time, and reached the
maximal effectiveness 95.38% in 30 minutes of the irradiation times. The
solution pH that gave highest effectiveness of As(III) photooxidation, 95.38%,
was 7. It was also found that As(III) with the concentration as much as 0.01 - 1
mg/L could be oxidized completely (100%), while increasing concentration gave
a decrease in the As(III) photoxidation. The presence of citric acid decreased the
photooxidation effectiveness of As(III) from 95.38% to 87.69%, due to the
competition of the consumption of OH radical for the oxidation of As (III) and
citric acid. |
| first_indexed | 2024-03-13T22:40:19Z |
| format | Thesis |
| id | oai:generic.eprints.org:99820 |
| institution | Universiti Gadjah Mada |
| last_indexed | 2024-03-13T22:40:19Z |
| publishDate | 2012 |
| publisher | [Yogyakarta] : Universitas Gadjah Mada |
| record_format | dspace |
| spelling | oai:generic.eprints.org:998202016-03-04T08:45:29Z https://repository.ugm.ac.id/99820/ KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2 PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 , Agrippina Wiraningtyas , Dr. rer. nat Nurul Hidayat Aprilita, M.Si. ETD Photooxidation of As(III) catalyzed by TiO2 has been studied. The photooxidation process was carry out in a closed reactor equipped with UV lamp, by stirring and irradiating a mixture of 5 mg/L As(III) solution and 5 mg TiO2 powder for a certain period of time. In the present work, the effect of exposure time, As(III) concentration, solution pH and the presence of citric acid on the photooxidation effectiveness of As(III) catalyzed by TiO2 have been evaluated. The effectiveness of the oxidized As(III) was presented as % oxidized As (III), that was calculate by substracting the initial As(III) amount with unoxidized one. The concentration of unoxidized As(III) was determined using toulidine blue complexing agent by mean of UV-visible spectrophotometry method. The results showed that the use of 5 mg TiO2 could increase the photooxidation effectiveness of 5 mg/L As(III) from 35.38% to 95.38%, which was initiated by adsorption process. The photooxidation effectiveness of As(III) increased with the longer the exposure time, and reached the maximal effectiveness 95.38% in 30 minutes of the irradiation times. The solution pH that gave highest effectiveness of As(III) photooxidation, 95.38%, was 7. It was also found that As(III) with the concentration as much as 0.01 - 1 mg/L could be oxidized completely (100%), while increasing concentration gave a decrease in the As(III) photoxidation. The presence of citric acid decreased the photooxidation effectiveness of As(III) from 95.38% to 87.69%, due to the competition of the consumption of OH radical for the oxidation of As (III) and citric acid. [Yogyakarta] : Universitas Gadjah Mada 2012 Thesis NonPeerReviewed , Agrippina Wiraningtyas and , Dr. rer. nat Nurul Hidayat Aprilita, M.Si. (2012) KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2 PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2. UNSPECIFIED thesis, UNSPECIFIED. http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=56073 |
| spellingShingle | ETD , Agrippina Wiraningtyas , Dr. rer. nat Nurul Hidayat Aprilita, M.Si. KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2 PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title | KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2
PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title_full | KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2
PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title_fullStr | KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2
PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title_full_unstemmed | KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2
PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title_short | KAJIAN FOTOOKSIDASI As(III) TERKATALISIS TiO2
PHOTOOXIDATION STUDY OF As(III) CATALYZED BY TiO2 |
| title_sort | kajian fotooksidasi as iii terkatalisis tio2 photooxidation study of as iii catalyzed by tio2 |
| topic | ETD |
| work_keys_str_mv | AT agrippinawiraningtyas kajianfotooksidasiasiiiterkatalisistio2photooxidationstudyofasiiicatalyzedbytio2 AT drrernatnurulhidayataprilitamsi kajianfotooksidasiasiiiterkatalisistio2photooxidationstudyofasiiicatalyzedbytio2 |