Andi Hairil Alimuddin
Student of Doctorate Program, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta

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KARAKTERISASI ADSORBEN KOMPOSIT SELULOSA - LIMBAH KARET ALAM UNTUK PENURUNAN KADAR COD DAN MINYAK LEMAK LCPKS Rahmayani, Ika; Zaharah, Titin Anita; Alimuddin, Andi Hairil
Jurnal Kimia Khatulistiwa Vol 8, No 3 (2020): Jurnal Kimia Khatulistiwa
Publisher : Jurnal Kimia Khatulistiwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.253 KB)

Abstract

Karakterisasi adsorben dilakukan terhadap produk sintesis komposit selulosa eceng gondok (Eicchornia crassipes)-limbah karet alam. Adsorben dikompositkan dengan tujuan untuk meningkatkan kinerja dari selulosa eceng gondok dan limbah karet alam sebagai adsorben untuk menurunkan kadar Chemical Oxygen Demand (COD) dan minyak lemak pada limbah cair kelapa sawit. Kondisi optimum dari adsorben dalam penurunan kadar COD dan minyak lemak dilakukan dengan variasi massa (selulosa : karet) 1:1, 1:2 dan 2:1 dan variasi waktu kontak selama 15, 30, 45, 60 dan 75 menit. Hasil karakteristisasi menggunakan spektroskopi inframerah menunjukan adanya gugus fungsi O-H dari selulosa pada bilangan gelombang 3425,58 cm-1, dan gugus C=C dari karet alam pada bilangan gelombang 1635,64 cm-1. Data ini menunjukan bahwa hasil sintesis tersebut adalah komposit selulosa-karet alam. Kondisi optimum dari adsorben untuk mengikat zat organik terjadi pada variasi massa (selulosa : karet) 1:1 dan waktu kontak selama 30 menit dengan % efisiensi adsorbsi sebesar 83%. Kondisi optimum adsorben untuk mengikat minyak lemak terjadi pada variasi massa (selulosa : karet) 1:2 dan waktu kontak selama 30 menit dengan %efisiensi adsorbsi sebesar 84%. Hasil ini menunjukan bahwa komposit selulosa – limbah karet alam dapat dijadikan adsorben untuk penurunan kadar COD dan minyak lemak pada limbah cair pabrik kelapa sawit.Kata Kunci : selulosa, eceng gondok, karet alam, komposit
Pemanfaatan Minyak Daun Cengkeh untuk Sintesis 3,4-dimetoksibenzil Sianida sebagai Bahan Dasar Sintesis Isoflavon Alimuddin, Andi Hairil; Matsjeh, Sabirin; Anwar, Chairil; Mustofa, Mustofa
Jurnal Natur Indonesia Vol 15, No 1 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.173 KB) | DOI: 10.31258/jnat.15.1.68-74

Abstract

This research was aimed to utilize eugenol isolated from clove leave oil in the synthesis of isoflavones. Eugenol was usedas a raw material by converting into 3,4-dimethoxybenzyl cyanide through several stages of reactions. These stages weremethylation of eugenol, isomerization of methyleugenol, oxydation of methylisoeugenol, reduction of 3,4-dimethoxybenzaldehyde, halogenation of 3,4-imethoxybenzyl alcohol and nitrilization of 3,4-dimethoxybenzyl chloride to3.4-dimethoxybenzyl cyanide. Methylation of eugenol using dimethylsulfate and NaOH catalyst produced methyleugenolin 93.60% purity. Isomerization of methyleugenol employing base of potassium tertiary butoxide (t-BuOK) in dimethylsulfoxide (DMSO) gave methylisoeugenol with 87.15% yield and 98.10% purity. Oxidation of methylisoeugenol usingpotassium dichromate (K 2 Cr 2 O 7 ) was performed catalyst transfer phase (CTP) system of polysorbate 80 to 83.40% 3.4-dimethoxybenzaldehyde yield and 90.20% purity. Reduction of 3.4-dimethoxybenzaldehyde with sodium borohidrat (NaBH 4 )produced 98% yield. Halogenation of 3,4-dimethoxybenzyl alcohol by SOCl 2 to 3,4-dimethoxybenzyl chloride followed bynitrilisation using sodium cyanide produced 3.4-dimethoxybenzyl cyanide with 83.90% purity after reflux for 20 hours.
Transepidermal Water Loss Value Comparison Between Tengkawang and Durian Seed Oil Lotion Febriaty, Irma Ramadhani; Usman, Thamrin; Alimuddin, Andi Hairil
Jurnal Natur Indonesia Vol 18, No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (860.444 KB) | DOI: 10.31258/jnat.18.1.20-30

Abstract

Body epidermis has an important health function to prevent body dehydration. This research aims to compare Transepidermal Water Loss (TEWL) values between durian seed oil and tengkawang oil. Skin that had been applied with tengkawang oil and durian seed oil lotion were tested for irritation and TEWL values. The tengkawang oil had an acid number of 17 g/mol and contained  8.54 % free fatty acid, while the durian seed oil had an acid number of 6.34 g/mol and contained 2.89 % free fatty acid.  Irritation testing was done using lotion containing 100 % of each oil. TEWL analysis on skin applied with the tengkawang oil lotion after 1 hour showed that the lotion could reduce epidermal water evaporation by 35.23 % compared to the skin condition before treatment.  Epidermal water evaporation reduction at the second, third and fourth hours after the tengkawang oil lotion application was 31.33 %, 33.93 % and 27.9 %, respectively. TEWL analysis on skin applied with the durian seed oil lotion after 1 hour showed that the lotion could reduce epidermal water evaporation by 11.34 % compared to the skin condition before treatment.  Epidermal water evaporation was reduced 14.64 %, 10.53 % and 2.99 % at the second, third and fourth hours after application of the durian seed oil. Based on these results, it can be concluded that tengkawang oil gives better TEWL values compared to durian seed oil.