Pengaruh jenis pelarut dan kecepatan homogenizer terhadap karakteristik partikel katekin gambir

Yeni, Gustri; Silfia, S; Diza, Yulia Helmi

doi:10.24960/jli.v9i1.5227.9-14

Cited by 6 publications

(10 citation statements)

References 6 publications

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“…It is expressed as the weight average molecular weight divided by the number average molecular weight. Results from the study carried out by Danhier et al [37] (in Yeni et al [38]) states that if the PI value is less than 0.3, it indicates that the From the data in Table 6, it was observed that the addition of SiO 2 to a composite in the right composition caused the z-average or the average size of the particles to become smaller. In addition, the most occurring particle size was observed from the mode value.…”

Section: Characterization Of Particle Size Distribution Of Tio2/sio2 Compositesmentioning

confidence: 98%

Photocatalytic Phenol Degradation by Silica-Modified Titanium Dioxide

et al. 2021

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Titanium dioxide (TiO2) has been widely applied as a photocatalyst for wastewater treatment due to its high photocatalytic activity and it can remove various harmful organic pollutants effectively. Under heated system, however, TiO2 is prone to agglomeration that decrease its abilities as a photocatalyst. In order to overcome the agglomeration and increase its thermal resistance, addition of silica (SiO2) as supporting material is proposed in this research. Silica or silicon dioxide can be extracted from natural resources such as beach sand. Here, we report the application of a composite photocatalyst of TiO2/SiO2 to remove phenolic compounds in wastewater. The photocatalyst was synthesized by adding SiO2 from beach sand onto TiO2 through impregnation methods. The results of the X-ray diffraction (XRD) showed that TiO2 was present in the anatase phase. The highest crystallinity was obtained by TiO2/SiO2 ratios of 7:1. SEM results showed that the shape of the particles was spherical. Further characterizations were conducted using Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) analysis, and a particle size analyzer (PSA). By using the optimized condition, 96.05% phenol was degraded by the synthesized photocatalyst of TiO2/SiO2, under UV irradiation for 120 min. The efficiency of the TiO2/SiO2 is 3.5 times better than commercial TiO2 P25 for the Langmuir–Hinshelwood first-order kinetic model.

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Section: Characterization Of Particle Size Distribution Of Tio2/sio2 Compositesmentioning

confidence: 98%

Photocatalytic Phenol Degradation by Silica-Modified Titanium Dioxide

et al. 2021

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“…Ukuran formulasi yang kecil menunjukkan emulsi yang baik antara formulasi dalam air. Pegecilan ukuran dengan menggunakan homogizer dan sonikasi mampu meningkatkan homogenisasi dan pembentukan emulsi yang lebih seragam dibandingkan sebelum pengecilan ukuran [24]. Hasil penelitian juga menunjukkan semakin lama sonikasi dilakukan, maka ukuran partikel juga semakin kecil.…”

Section: Gambarunclassified

Identifikasi Karakteristik Pengecilan Ukuran dengan Metode Sonikasi dari Formula Insektisida yang Ditambahkan Surfaktan Berbasis Sawit

Yunira

Suryani

Dadang

et al. 2021

J. Sci. Appl. Tech.

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Size reduction of pesticide formulation can improve its performance to pest and disease control in plant. Size reduction methods were high speed agitation, ultrasonic emulsification, high pressure homogenization, microfluidic and membrane emulsification. Homogenizer and sonication methods were most widely used because its high effectivity in size reduction. The purpose of this research was to identify the effect of size reduction on physico chemical properties of the insecticide formulation by adding palm oil surfactant. The method of this research was to make an emulsifiable concentrate (EC) formulation using 15% active ingredient of emamectin benzoate, xylene, cationic surfactant of 1%, nonionic surfactants of 6% with DEA and APG surfactant ratio of 2:3. This formulation was mixed using Homogenizer at a speed of 4000 rpm and sonication with frequencies of 42 kHz at various times of 15, 30 and 45 minutes. The best result of this research was using sonication method for 45 minutes. The best physico-chemical properties were emulsion stability after 2 hours, cream formation after 24 hours emulsion, particle size of 0.70 μm with homogenous dispersion, surface tension of 25.54 dyne/cm, contact angle at 0 minutes of 25.05⁰ and contact angle after 15 minutes of 0⁰.

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“…Teknologi proses dilakukan berdasarkan perbedaan sifat kelarutan antara katekin dan tanin dalam air. Katekin dalam keadaan murni sulit larut dalam air dingin, mudah larut dalam air panas, larut dalam alkohol dan etil asetat (Yeni et al, 2019).…”

Section: Kabupaten Limapuluhunclassified

“…Teknologi proses ekstraksi untuk mendapatkan katekin dengan kandungan yang diharapkan dapat dilakukan melalui ekstraksi lanjutan gambir hasil pencucian ulang dengan air (gambir murni). Penelitian peningkatan kemurnian katekin dari gambir murni sudah dilakukan, yaitu menggunakan kolom amberlit dengan campuran pelarut etanol dan etilasetat, tetapi katekin yang dihasilkan berwarna kurang cerah (Muchtar et al, 2008, Yeni et al, 2019, 2014a.…”

Section: Kabupaten Limapuluhunclassified

Rasio pelarut etanol dan etil asetat pada proses ekstraksi terhadap karakteristik katekin dari gambir

Anova

Yeni²

2020

JLI Padang

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Pengaruh jenis pelarut dan kecepatan homogenizer terhadap karakteristik partikel katekin gambir

Abstract: Pengaruh jenis pelarut dan kecepatan homogenizer terhadap karakteristik partikel katekin gambir Effect of solvent type and homogenizer speed on particle characteristics of gambier catechins

Cited by 6 publications

References 6 publications

Photocatalytic Phenol Degradation by Silica-Modified Titanium Dioxide

Photocatalytic Phenol Degradation by Silica-Modified Titanium Dioxide

Identifikasi Karakteristik Pengecilan Ukuran dengan Metode Sonikasi dari Formula Insektisida yang Ditambahkan Surfaktan Berbasis Sawit

Rasio pelarut etanol dan etil asetat pada proses ekstraksi terhadap karakteristik katekin dari gambir

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