Immobilization of PDMS-SiO2-TiO2 composite for the photocatalytic degradation of dye AO-7

2016 ◽  
Vol 74 (7) ◽  
pp. 1680-1688 ◽  
Author(s):  
Feigao Xu ◽  
Wencheng Tan ◽  
Heng Liu ◽  
Dan Li ◽  
Yuexiang Li ◽  
...  

Crack-free PDMS-SiO2-TiO2 composite as photocatalyst was prepared for degrading dyes by using thin-film fixed bed reactor. The hydrophobic surface of the photocatalyst loaded with PDMS-SiO2-TiO2 composite could be considered as an extractant for organic pollutants. The effect of different supports including pumice stone, medicinal stone, and fiberglass for photocatalytic efficiency were compared. Under the same condition, it was found that the photocatalytic degradation effect of dyes was best when PDMS-SiO2-TiO2 composite was fixed on pumice stone rather than medicinal stone or fiberglass. Furthermore, when pumice stone was used as the support for PDMS-SiO2-TiO2 composite, the photocatalytic degradation effect of dyes hardly decreased after five cycles.

2003 ◽  
Vol 156 (1-3) ◽  
pp. 179-187 ◽  
Author(s):  
M Noorjahan ◽  
M Pratap Reddy ◽  
V Durga Kumari ◽  
B Lavédrine ◽  
P Boule ◽  
...  

Desalination ◽  
2009 ◽  
Vol 246 (1-3) ◽  
pp. 344-352 ◽  
Author(s):  
Ghanem Zayani ◽  
Latifa Bousselmi ◽  
Farouk Mhenni ◽  
Ahmed Ghrabi

2019 ◽  
Vol 10 (05) ◽  
pp. 171-184 ◽  
Author(s):  
Ignace Christian M’Bra ◽  
Grah Patrick Atheba ◽  
Didier Robert ◽  
Patrick Drogui ◽  
Albert Trokourey

2017 ◽  
Vol 60 ◽  
pp. 285-289 ◽  
Author(s):  
Ouassila Benhabiles ◽  
Nadia Chekir ◽  
Nadia Chekir

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
N.W. Yuningrat ◽  
N. Retug ◽  
I.M. Gunamantha

Abstrak Tujuan penelitian ini adalah untuk mengetahui karakteristik batu apung dan semen yang digunakan sebagai bed dalam reaktor fixed bed dan efektivitasnya dalam mendegradasi methyl orange akibat pengaruh pH larutan dan sinar dalam sistem reaksi. Bed yang digunakan adalah batu apung berukuran kecil dengan perekatan semen dalam cetakan stainless steel berukuran 5x16x16 cm. Fotodegradasi methyl orange dijalankan pada pH larutan 7 dan diberikan sinar 2 buah lampu UV Sankyo Denky FT10T8BLB FL10BLB 10 W 325 nm selama 1, 2, 3, 4, 5, 6 dan 7 jam. Methyl orange disirkulasi pada temperatur kamar dari tangki penampungan menuju reaktor fixed bed menggunakan pompa dengan debit sebesar 6,89 mL/detik. Batu apung dan semen yang digunakan sebagai bed dianalisis bentuk dan unsur yang dikandungnya dengan menggunakan SEM EDX. Konsentrasi methyl orange sebelum dan setelah proses fotodegradasi diukur dengan menggunakan spektrofotometer UV Visibel Shimadzu 1240. Hasil penelitian menunjukkan bahwa batu apung memiliki bentuk yang tidak beraturan dengan kandungan unsur tertinggi berupa Si sedangkan semen yang digunakan sebagai perekat memiliki bentuk seperti butiran yang homogen dengan kandungan unsur tertinggi Ca. Fotodegradasi methyl orange berjalan optimum pada pH 3 untuk waktu penyinaran 7 jam sebesar 40,37%. Degradasi methyl orange berlangsung efektif dengan adanya sinar dibandingkan tanpa penyinaran. Reaksi fotodegradasi methyl orange mengikuti kinetika reaksi orde satu semu dengan nilai k sebesar 0,0378 jam-1. Kata kunci : batu apung-semen, fotodegradasi, methyl orange, reaktor fixed bed Abstract The objectives of this research were to know the characterization of pumice stone and cement used in fixed bed reactor. The fixed bed used was made from pumice stone with a gluing cement in 5x16x16 cm stainless steel mold. Methyl orange photodegradation were carried out with pH 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,and 14 and irradiated by 2 lamps of UV Sankyo Denky FT10T8BLB FL10BLB 10 W 325 nm for 1, 2, 3, 4, 5, 6 and 7 hours. Methyl orange was circulated at room temperature from its reservoir to fixed bed reactor by a pump with 6.89 mL/s. Pumice stone and cement were analyzed by SEM EDX to know its characterization. Methyl orange concentration before and after photodegradation were measured by UV Visible Spectrophotometer Shimadzu 1240. The result showed that pumice stone has irreguler shape with the highest material is Si and cement has homogeneous granule with the highest material is Ca. The best fotodegradation of methyl orange with UV irradiation at pH 3. Methyl orange photodegradation follows pseudo first order kinetics with reaction constant 0,0378 hour-1. Keywords : fixed bed reactor, methyl orange, pumice stone-cement, photodegradation


2014 ◽  
Vol 34 (2) ◽  
pp. 380-386 ◽  
Author(s):  
Anoop Verma ◽  
Divya Dixit ◽  
Amrit Toor ◽  
Jayant Srivastava

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