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All Journal FLUIDA Fullerene Journal of Chemistry
Budi Santoso
Politeknik Negeri Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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Perbandingan Efektivitas Ampas Teh Hitam dan Ampas Teh Hijau sebagai Adsorben Ion Logam Cr (VI) Rahma Gurroh Muhajjalin; Inayah Agawijaya; Budi Santoso; Joko Suryadi
Jurnal Kimia Fullerene Vol 6 No 2 (2021): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v6i2.327

Abstract

Industrial waste contains various hazardous chemical compounds, such as heavy metals, one of which is chromium hexavalent ion, Cr (VI). Cr (VI) ion is carcinogenic and has toxic effects on humans. A study to treat Cr (VI) ion waste by adsorption using tea dregs has been carried out. Two types of tea dregs, black tea and green tea dregs are used as adsorbents, to compare their adsorption effectiveness. Adsorption effectiveness was determined using the visible-spectrophotometer. Parameters such as pH, adsorbent mass and concentration of Cr (VI) ions were optimized. Study determination of the adsorption isotherm model for each tea dregs included. The results showed that black tea dregs produced greater effectiveness than green tea dregs, with optimum adsorption conditions at pH 2, adsorbent mass of 0,8 grams and Cr (VI) ion concentration of 100 ppm with 99,50% removal efficiency. Meanwhile, green tea dregs produced the optimum adsorption conditions at pH 2, adsorbent mass of 0,4 grams and Cr (VI) ion concentration of 50 ppm with 87,49% removal efficiency. Langmuir adsorption isotherm model is fit for adsorption process by black tea dregs, meanwhile, green tea dregs fit with Freundlich and Langmuir isotherm model.
Pengaruh Gelling Agent terhadap Pembentukan Oleogel Berbasis Canola Oil Dhyna Analyes Trirahayu; Budi Santoso
Fluida Vol 12 No 2 (2019): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v12i2.1618

Abstract

Indonesia merupakan negara dengan kekayaan hayati tinggi. Salah satu hasil kehutanan yang melimpah di Indonesia adalah pulp. Selain sebagai kertas, pulp juga dapat diolah menjadi produk turunan lain yang memiliki nilai jual lebih tinggi, salah satunya selulosa. Kandungan selulosa dalam pulp cukup tinggi dapat mencapai lebih dari 90%. Dari selulosa ini banyak produk turunan yang dapat dihasilkan dengan nilai ekonomi yang lebih tinggi dan sangat bermanfaat. Turunan selulosa dapat dimanfaatkan sebagai gelling agent salah satunya untuk membentuk oleogel. Oleogel adalah gel di mana fasa cairnya adalah minyak, berbeda dengan hidrogel, yang memiliki fasa cair air. Potensi aplikasi dari oleogel sangat beragam di industri makanan, farmasi, kosmetik, dan petrokimia. Salah satu produk turunan selulosa yang dapat dimanfaatkan sebagai gelling agent adalah hydroxypropyl methyl cellulose (HPMC). Penelitian ini bertujuan untuk melakukan observasi terhadap pembentukan oleogel berbasis minyak canola dengan menggunakan HPMC dan Xanthan Gum (XG) sebagai gelling agents. Pembentukan oleogel dilakukan menggunakan kombinasi HPMC dan XG dengan komposisi yang divariasikan menggunakan metode pengadukan. Oleogel terbaik diperoleh menggunakan kombinasi gelling agent HPMC : XG = 1 : 1 sebanyak 2 gr (2% b/b).
Application of Gold Nanoparticles Synthesized with Malva Nut Gum as Reducing Agent for scFv Conjugates in a Colorimetric Chikungunya Virus Detection Muhamad Zulchoir Rasyid; Ratna Yulistya Ningrum; Sinta Setyaningrum; Budi Santoso; Muhammad Yusuf; Bachti Alisjahbana; Toto Subroto; Bevi Lidya
Fluida Vol 16 No 1 (2023): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4493

Abstract

Gold nanoparticles have good surface plasmon properties in the presence of free electrons on their surface. The presence of free electrons on the surface of the plasmon causes gold nanoparticles to be able to bind to various kinds of biomolecules and proteins, including single-chain variable fragments (scFv). In this study, gold nanoparticle conjugates with Chikungunya antiviral scFv have been successfully prepared with the aim of developing a colorimetric method for rapid detection of envelope protein Chikungunya virus (E2 CHIKV). The manufacture of gold nanoparticles was carried out using malva nut gum and trisodium citrate as reducing agents. The results showed the formation of the AuNP-scFv conjugate which was characterized by a shift in the maximum wavelength for gold nanoparticles synthesized using malva nut gum as a reducing agent from 532.89 nm to 536.62 nm. Similarly, for gold nanoparticles synthesized using trisodium citrate as a reducing agent, the maximum wavelength shifted from 528.99 nm to 531.95 nm. The detection result of E2 CHIKV protein using the AuNP-scFv conjugate has not shown a positive result
Co-Authors Bachti Alisjahbana Bevi Lidya Inayah Agawijaya Muhamad Zulchoir Rasyid Muhammad Yusuf Rahma Gurroh Muhajjalin Ratna Yulistya Ningrum Setyaningrum, Sinta Suryadi, Joko Toto Subroto Trirahayu, Dhyna Analyes