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Hary Sanjaya
Universitas Negeri Padang
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Degradasi Zat Warna Methyl Orange dengan Katalis TiO2 Menggunakan Metode Fotosonolisis Suci Ramadhani; Hary Sanjaya; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.116883

Abstract

Research on the degradation of methyl orange has been carried out using the photosonolysis method with the help of a TiO₂ catalyst. This study aims to determine how the effect of adding catalyst mass to the degradation of methyl orange and to determine the optimum time to degrade methyl orange. The variation of the mass of the catalyst used to degrade the methyl orange dye is from 0 grams to 0.25 grams, while the time variation is in the range of 30 minutes to 150 minutes with a 30 minute interval. The results of the measurement of the maximum wavelength and the color of methyl orange using a UV-Vis spectrophotometer were 462.8 nm with an absorbance value of 0.772. In the variation of the catalyst mass, the maximum mass obtained at 0.1 grams of TiO₂ catalyst with %D obtained was 23.46% while for the variation of the degradation time the optimum time was obtained at 120 minutes with the %D result of 32.04%. In this study, the presence of hydroxyl radicals produced during the photosynthesis process plays an important role in the process of degrading methyl orange.
Degradasi Zat Warna Eriochrome Black-T (EBT) dengan Katalis ZnO-TiO2 menggunakan Metode Sonolisis Santika Putri; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.117063

Abstract

Eriochrome Black-T (EBT) is a dye that is widely used in the textile industry, dyeing silk, wool, nylon, double fiber and in the laboratory as a complexometric titrant for the estimation of Ca2+, Mg2+ and Zn2+. This EBT dye is dangerous if released into natural waters which can significantly affect the photosynthetic activity of the aquatic environment because its decomposition products such as naphthoquinone are carcinogenic. So, its presence in drinking water and surface water can be deadly. Therefore, the dyestuff is degraded before being discharged into the environment so that the resulting environmental pollution can be described. The purpose of this research is to determine the optimum time and the addition of TiO2 doping on ZnO catalyst for the degradation of EBT by sonolysis method. The percentage of EBT dye degradation was obtained from the absorbance value measured using a UV-Vis spectrophotometer. Absorbance measurements were carried out at the maximum wavelength (λ max) of EBT, which was 535.60 nm. The results showed that the optimum time for EBT degradation was 30 minutes with a degradation percentage of 81.65%. On the effect of variations in the addition of TiO2 doping showed optimum results at ZnO-TiO2 10%  with a degradation percentage of 84.30%.
Uji Kondisi Optimum Desorpsi Anion Fosfat pada Silika Mesopori Termodifikasi DMA (Dimethylamine) Hainunnisa Syafitriza; Budhi Oktavia; Hary Sanjaya; Hardeli Hardeli
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118092

Abstract

Mesoporous silica is solid silica having a pore size of 2-50 nm. Silica modification is done to increase the ability of silica to absorb anions, one of which is phosphate anion. The modifier compound used is dimethylamine. Silica and dimethylamine can bind with the addition of a linking compound, namely GPTMS. This modified silica can be used to adsorb phosphate anions to see the absorption of silica against phosphate anions. Phosphate ion adsorption using silica has an adsorption capacity of 0.0172 mg/g with an absorption percentage of 88.09%. Desorption with hydrochloric acid obtained a desorbed phosphate concentration of 0.773 mg/L with a desorption percentage of 89.02% while using sulfuric acid the desorbed phosphate concentration was 0.437 mg/L with a desorption percentage of 48.81%. The concentration variations of hydrochloric acid were 0.010 M, 0.025 M, 0.050 M, 0.075 M, 0.10 M, 0.15 M and 0.20 M. The maximum desorption result at 0.1 M concentration was 0.0086 mg with a percentage of 100%.
Degradasi Zat Warna Indigosol Red Ir Menggunakan Metode Sonolisis Dengan Bantuan Katalis ZnO Indah Humaira Saragih; Hary Sanjaya
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117679

Abstract

This research was conducted for the modeling degradation process of Indigosol Red Ir dye using the sonolysis method with the help of a ZnO catalyst. This study aims to determine the optimum mass addition of ZnO  catalyst in the degradation process of Indigosol Red Ir dye. Sonolysis method using an ultrasound with frequency 47 kHz. The results of the percent degradation were seen from the absorbance measurement using a uv-vis spectrophotometer at a maximum wavelength of 510.2 nm. The results showed that the addition of the optimum mass of ZnO catalyst was 0.05 grams with a degradation percentage of 93.72%.
Degradasi Zat Warna Rhodamin B menggunakan Katalis TiO2 dengan Metode Fotosonolisis Wenti Aulia; Hary Sanjaya
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118004

Abstract

Research has been carried out on the degradation of Rhodamine B dye with TiO2 as a catalyst using the photosonolysis method. The purpose of this study was to determine the optimum time and optimum mass of the TiO2 catalyst used to degrade rhodamine B. The results of the percentage degradation of rhodamine B were obtained from the absorbance value measured using a UV-Vis spectrophotometer. The maximum wavelength of rhodamine B obtained from the measurement of the UV-Vis spectrophotometer is 553.8 nm. The results showed that the optimum time to degrade rhodamine B was 210 minutes with a degradation percentage of 95.39%. On the effect of increasing the mass of TiO2 catalyst, the optimum mass of TiO2 is 0.05 grams with a degradation percentage of 93.44%.
Isolasi dan Karakterisasi α-Selulosa Dari Kulit Buah Matoa (Pometia pinnata) Fauzan Aulia Akbar; Edi Nasra; Desy Kurniawati; Deski Beri; Hary Sanjaya
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117793

Abstract

Cellulose isolation from the matoa fruit peel (Pometia pinnata) has been carried out by means of acid hydrolysis and alkaline hydrolysis. The purpose of this study was to isolate cellulose in the peel of matoa fruit and determine what is the purity level of cellulose contained in the peel of matoa fruit, FTIR is used to identify cellulose functional groups in matoa fruit peel. Results of this study, an yeild of the results of cellulose isolation of matoa peel was 41.3% with the purity level of cellulose of matoa fruit peel of 47.63%. The results of characterization using FTIR are known to have cellulose groups contained in the matoa peel such as -OH, -CH, and C-O groups which are the main functional groups in cellulose.
Co-Authors Abdul Rafi Jelani Ananda Putra Aulia Rahmi Budhi Oktavia Deski Beri Desy Kurniawati Edi Nasra Fauzan Aulia Akbar Fitri Amelia Hainunnisa Syafitriza Hardeli Hardeli Hendra Anwar Illa Ramadhani Indah Humaira Saragih Isnaeni Isnaeni Jepri Limbong Laila Suryani Muhammad Gani Ariski Nilam Nilam Santika Putri Septian Budiman Suci Ramadhani Ulianas, Alizar Umar Kalmar Nizar Wahyunita Wulandari Wenti Aulia Yohandri Yollanda Bunga Osya