THE OPERATIONAL PARAMETERS EFFECT ON PHOTOCATALYTIC DEGRADATION OF DIAZINON USING CARBON AND NITROGEN MODIFIED TiO2

Khoiriah, K.; Safni, Safni; Syukri, S.; Gunlazuardi, Jarnuzi

doi:10.31788/rjc.2020.1335743

Cited by 9 publications

(4 citation statements)

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“…The degradation percentage by photolysis is greater than the degradation percentage by sonolysis. The activated carbon and UV-A light can affect the degradation process because RHAC can adsorb more phenol and reduce the band gap of TiO2 and UV-A light can generate electrons to produce hydroxyl radicals (•OH) [15]. The UV light used in photolysis is generally more effective to degrade phenol than ultrasonic waves in sonolysis.…”

Section: Effect Of Catalyst On Phenol Degradationmentioning

confidence: 99%

“…However, TiO2 still has disadvantages including low adsorption ability, wide band gap, tends to aggregate during the degradation process, and requires a lot of photon energy [11]. Previous studies used several catalysts such as N-doped TiO2, C, N-codoped TiO2 dan Cdoped TiO2 in the degradation process of toxic organic compounds (dyes, pesticides, and antiseptics such as phenol) [13] [14] [15] [16] [17] by sonolysis [18] and photolysis [19] as an alternative catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC

Safni,

Patricia,

Ollinovela

et al. 2023

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This study focuses on the degradation of phenol in aqueous solutions using photolysis and sonolysis methods. It investigates the impact of catalyst mass, types of light (UV-A, UV-C, and visible light), types of catalyst (RHAC, TiO2, and TiO2/RHAC), and processing time on phenol degradation. The phenol solutions are analyzed before and after degradation using Spectrophotometer UV-Vis and HPLC. The research aims to understand the factors influencing phenol degradation and provide a basis for further studies to enhance the efficiency of phenol removal. Results show significant improvements in degradation percentages of phenol by using TiO2/RHAC as the catalyst. Sonolysis achieves a degradation of 20.82% with a catalyst, which increases to 50.57% with the catalyst. Photolysis achieves a degradation of 29.06%, which rises to 91.99% with the catalyst. The highest degradation percentage is achieved using UV-A light for 5 hours with a catalyst mass of 30 mg of TiO2/RHAC catalyst. HPLC analysis confirms a decreased phenol concentration and the presence of intermediate compounds. The TiO2/RHAC catalyst demonstrates the promising potential for efficient phenol degradation in aqueous solutions.

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Section: Effect Of Catalyst On Phenol Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC

Safni,

Patricia,

Ollinovela

et al. 2023

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“…Seringkali sonokimia diusulkan dalam kombinasi dengan teknik lain seperti metode sonozolisis menggabungkan treatment gas ozon dan getaran ultrasonik secara bersamaan untuk meningkatkan efisiensi degradasi (Gligorovski et al, 2015). Berbagai penelitian tentang penerapan AOPs terhadap degradasi pestisida dan residu pestisida telah dilaporkan (Amelia et al, 2015;Heleno et al, 2016;Arfi et al, 2017;Tzortzakis and Chrysargyris, 2017;Cengiz et al, 2018;Zhu et al, 2019;Khoiriah et al, 2020;Khoiriah et al, 2020a;Khoiriah et al, 2020b) telah disajikan sebagai metode yang efektif untuk mengubah polutan yang tidak dapat terurai menjadi zat yang tidak berbahaya.…”

Section: Pendahuluanunclassified

Perlakuan ozon dan sonokimia untuk degradasi residu mankozeb pada cabe hijau (Capsicum annuum L.)

Safni

Rahman²,

Deswati³

et al. 2021

JLI Padang

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“…Advanced Oxidation Processes (AOPs) are a promising method to reduce organic compounds like dyes [17], [18], medicines [19], and pesticides [20], [21]. AOPs methods such as ozonolysis, sonolysis, and sonozolysis can produce hydroxyl radicals (•OH) that can be used to breakdown compounds into the more simple and environmentally friendly compounds (into H2O and CO2) [22], [23].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Imidacloprid Residue in Cabbage (Brassica oleracea) Using Advanced Oxidation Processes and Its Analyzing by Spectrophotometer and HPLC

Safni¹,

Trisna²,

Syukri³

2022

International Journal on Advanced Science, Engineering and Information Technology

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Imidacloprid is a synthetic pesticide used to kill and control insects by cabbage farmers. Consuming cabbage contaminated with imidacloprid can cause health problems such as chronic kidney, reproductive disorders and cancer. The parameters for degradation of imidacloprid residue in cabbage were processing time (5, 10, 15, 20, and 25 min), water volume (50, 100, 150, and 200 mL), and sample mass (25, 50, 75, and 100 g). Degradation of imidacloprid residue in cabbage using Advanced Oxidation Processes (AOPs) methods such as ozonolysis, sonolysis, and sonozolysis were compared. Methods of ozonolysis, sonolysis, and sonozolysis have performed using an ozonicator (ozone dose: 400 mg h -1 ), sonicator (35 kHz), and a combination of both. Using spectrophotometers UV-Vis and High-Performance Liquid Chromatography (HPLC) measurements showed a decrease in imidacloprid concentration after degradation. The degradation percentage of the imidacloprid residue with ozonolysis was higher than that of sonolysis and sonozolysis. The percentage of imidacloprid degradation by ozonolysis in 50 g cabbage at 100 mL of water increased to 82.53% for 15 min. The HPLC chromatogram showed no new peaks that formed after degradation. The imidacloprid residue's degradation kinetics were then investigated. For all AOPs methods, the kinetic analysis demonstrated that imidacloprid degradation fit within a first-order kinetic model. The kinetic data showed that ozonolysis degraded imidacloprid with a half-life (t1/2) of 15.22 min, shorter than sonolysis and sonozolysis.

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THE OPERATIONAL PARAMETERS EFFECT ON PHOTOCATALYTIC DEGRADATION OF DIAZINON USING CARBON AND NITROGEN MODIFIED TiO2

Cited by 9 publications

References 0 publications

Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC

Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC

Perlakuan ozon dan sonokimia untuk degradasi residu mankozeb pada cabe hijau (Capsicum annuum L.)

Degradation of Imidacloprid Residue in Cabbage (Brassica oleracea) Using Advanced Oxidation Processes and Its Analyzing by Spectrophotometer and HPLC

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