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All Journal VALENSI Jurnal Riset Kimia Jurnal Kimia dan Kemasan Jurnal Kimia Mulawarman Jurnal Kimia Riset JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Biologi Tropis Indonesian Journal of Chemistry Jurnal Teknik Jurnal Inovasi Teknik Kimia Santika : Jurnal Ilmiah Sains dan Teknologi Jurnal Kimia dan Kemasan Prosiding Konferensi Nasional PKM-CSR Makara Journal of Science Jurnal Teknologi dan Inovasi Industri

Lela Mukmilah Yuningsih

Universitas Muhammadiyah Sukabumi

Author-ID : 2603996

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences

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Analisis Mutu Minyak Jelantah Hasil Peremajaan Menggunakan Tanah Diatomit Alami dan Terkalsinasi La Ode Sumarlin; Lela Mukmillah; Ratna Istianah
Jurnal Kimia Valensi Jurnal Valensi Volume 1, No.4, Mei 2009
Publisher : Syarif Hidayatullah State Islamic University

Kualitas minyak goreng sangat ditentukan oleh sifat fisika dan kimianya. Semakin sering minyakgoreng dipanaskan maka kualitasnya akan semakin menurun. Pada Penelitian ini dilakukan prosesperemajaan minyak goreng bekas (minyak jelantah) dengan menggunakan dua adsorben, yaituadsorben tanah diatomit alami dan tanah diatomit yang dikalsinasi. Dalam proses peremajaan inidilakukan proses aktivasi terhadap adsorben untuk dapat meningkatkan daya serap adsorben terhadapminyak jelantah. Parameter uji yang dilakukan untuk mengetahui kualitas minyak jelantah hasilperemajaan oleh tanah diatomit terdiri atas kadar air, kadar kotoran, bilangan peroksida dan kadarasam dengan metode titrasi. Hasil penelitian menunjukkan bahwa minyak jelantah hasil peremajaanoleh tanah diatomit alami mengalami kenaikan kualitas. Hal ini ditunjukan oleh penurunan kadar airminyak jelantah yang semula 1,2412%, kadar kotoran 3,2779%, bilangan peroksida 0,0168 mgO2/100gr, dan bilangan asam sebesar 1,0037. Setelah diremajakan oleh tanah diatomit alamimengalami penurunan kadar air sebesar 0,6139%, kadar kotoran 1,8100%, bilangan peroksida0,0121mg O2/100gr dan bilangan asam sebesar 0,9751. Begitupun dengan minyak jelantah hasilperemajaan dengan adsorben tanah diatomit terkalsinasi dengan kadar air sebesar 0,2881% kadarkotoran 0,6429%, bilangan peroksida 0,0099mg O2/100gr dan bilangan asam sebesar 0,8038. Minyakjelantah hasil peremajaan oleh tanah diatomit terkalsinasi mengalami peningkatan kualitas ataupenurunan persentase kadar air sebesar 76,79%, kadar kotoran 80,39%, bilangan peroksida 41,07%dan bilangan asam sebesar 19,92%. Begitupun untuk minyak jelantah hasil peremajaan oleh tanahdiatomit alami. Namun kenaikan kualitasnya tidak sebesar hasil peremajaan oleh tanah diatomitterkalsinasi, persentase penurunan kadar air pada minyak hasil peremajaan tanah diatomit alamisebesar 50,54% , kadar kotoran 44,78%, bilangan peroksida 27,68% dan bilangan asam sebesar2,85%. Dari data hasil penelitian dapat diketahui bahwa tanah diatomit alami daya serapnya lebihrendah daripada dengan tanah diatomit terkalsinasi.

Pengaruh Aktivasi Arang Aktif dari Tongkol Jagung dan Tempurung Kelapa Terhadap Luas Permukaan dan Daya Jerap Iodin Lela Mukmilah Yuningsih; Dikdik Mulyadi; A Jaka Kurnia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3091

The activated charcoal can be produced from various raw material which contains carbon such as corn cobs and coconut shell. Generally, activated charcoal made through activation process with added chemical materials. The kind of activator will give different influence on surface area or pores volume of the result activated charcoal. In this study, will be made activated charcoal from corn cobs and activated by physical and chemical with KOH activator. Carbonation process is performed at 800oC for 2 hours and followed by chemical activation process by KOH with mass ratio water: charcoal: KOH is 1:1:4, then activated by physical at 600oC for 4 hours. Conducted test on sample contain iodine adsorption and SEM. As a result, iodine adsorption of activated charcoal indicated at KOH 20%. the best adsorption of coconut shell activated charcoal is 1240.233 mg/g with surface area 2352.851 m2/g, while corn cobs activated charcoal is 1133.757 mg/g with surface area 2150.866 m2/g. Morphology of activated charcoal with KOH 20% have pore structure with high 22.63 µm and wide 26.41 µm, the resulting pore size included into macropores structure. Keywords: Activated charcoal, carbonation, activation, adsorption, surface area. DOI: http://dx.doi.org/10.15408/jkv.v2i1.3091

Peningkatan Kualitas Minyak Nilam (Pogostemon Cablin Benth) menggunakan Kombinasi Metode Fermentasi, Delignifikasi dan Destilasi Salih Muharam; Lela Mukmilah Yuningsih; Iim Sulaeman Rohana
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 2, November 2017
Publisher : Syarif Hidayatullah State Islamic University

Penyulingan minyak nilam tradisional dilakukan dalam kapasitas kecil dan menggunakanmetode penyulingan sederhanaberdasarkan pada perbedaan titik didih yang jauh atau salah satu komponen bersifat volatil. Proses ini menghasilkan kualitas minyak nilam kurang baik seperti bilangan asam lebih dari 8, minyak berwarna gelap, patchouli alkohol kurang dari 30%, dan kadarair tinggi.Pada penelitian ini telah dilakukan penyulingan minyak dari tanaman nilammenggunakan kombinasi metode yaitu fermentasi-delignifikasi, destilasi dan pemurnian untuk meningkatkan kualitas minyak nilam. Hasil penelitian ini menunjukan bahwa kombinasi proses fermentasi-delignifikasi-destilasi-adsorpsi menghasilkan kualitas minyak nilam yang lebih baik dengan kualitas bilangan asam, kandungan patchouli alkohol, kadar air dan bobot jenis berturut-turut adalah 7.48, 35.60%, 0.56%,0.0957. The traditional distillationof patchouli oil conducted in small capacity and using a simple distillation method based on differences of wide a boiling point or one component is volatile. This process results a poor quality of patchouli oils such as the acid numbers is more than 8, dark-colored oils, patchouli alcohols contentis less than 30%, and high water content. In this research has been done oil distillation from patchouli plants using a combination of methods i.e. fermentation-delignification, distillation and purification to improve of patchouli oil quality. The results show that the combination of the fermentation-delignification-distillation-adsorptionis better in quality of patchouli oil with the acid number, patchouli alcohol content, water content and density were 7.48, 35.60%, 0.56%, and 0.0957 respectively.

Efektivitas Pemanfaatan Serbuk Gergaji dan Limbah Media Tanam Jamur (Baglog) sebagai Bahan Baku Pembuatan Biogas Dikdik Mulyadi; Lela Mukmilah Yuningsih; Desi Kusumawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Biogas is one of energy that can be produced by anaerobic fermentation of the organic compounds. The objective of this study was to determine the effectiveness of the utilization of waste of media mushroom growth (baglog) with sawdust as raw material for biogas with cow dung activators. The study was conducted through anaerobic fermentation of the samples containing waste baglog (sample 1) and sawdust (sample 2), with the addition of cow manure activator to each sample. Both of these samples do anaerobic fermentation for 32 days, then measuring the volume of biogas every 4 days for 32 days. Methane content in samples 1 and 2 measured by using gas chromatography. To see the effect of the addition of activators cow dung biogas volume measurement was carried out with cow dung without addition baglog waste and sawdust. The process of degradation baglog and sawdust with an activator of cow dung could be observed in some of the parameters through total solids (TS), total volatile solids (TVS), volatile fatty acids (VFA), the degree of acidity (pH), and C/N ratio. The results showed that effectiveness of sample 1 resulted in the everage of total volume biogas 28% higher than sample 2. The content of methane in sample 1 and sampel 2 was 54% %, and 0.21% respectively. The fermentation process biogas production in this experiment was carried out at pH 7, with a value of TS, TVS and VFA showed a decrease trend after the fermentation process, C/N ratiowas lower than the baglog waste sawdust until day 32 retention time. Keywords: Sawdust, baglog waste, biogas, fermentation, methane DOI : http://dx.doi.org/10.15408/jkv.v2i1.3100

Sintesis Komposit Polianilin-Karbon Aktif dari Tongkol Jagung sebagai Elektrolit Padat Pada Baterai Lela Mukmilah Yuningsih; Yusri Mutia Fauziyah
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 2, November 2018
Publisher : Syarif Hidayatullah State Islamic University

The polyaniline-activated carbon composites are synthesized using aniline chemical oxidation polymerization methods as well as variations in carbonization temperature of 800 °C and 1000 °C. The polyaniline-activated carbon composites are characterized by their value of conductivity, functional groups, crystallinity, morphology, composition and electrical quantities by LCR-meter analysis, FTIR, XRD, SEM-EDX and digital multimeters. The conductivity value of composite polyanilin-activated carbon with carbonization temperature of 800°C and 1000 °C are 0.718 S/cm and 1.1003 S/cm. Polyaniline-activated carbon 800 composite and Polyaniline-activated carbon 1000 composite showed absorption bands acoording to PANI. The wave number that appear on PANI-activated carbon 800 composite and PANI-activated carbon 1000 peak is characteristic of PANI where the wave number 1562 cm-1, 1558 cm-1 is the vibration of the C = N and 1479 cm-1, 1475 cm-1is the vibration of the C = C with slacking off the degree of crystallinity PANI-activated carbon 800 i.e. 23.31% and PANI-activated Carbon 1000 i.e. 37.68%. Analysis of surface morphology and composite element content using SEM-EDX shows that particles of polianilin grows on active carbon fiber and free from impurity. The resulting voltage and current both PANI-Carbon 800 and PANI-carbon 1000 are 1.09 volt 19.74 mA and 1.15 Volts 19.98 mA.

Co-Authors A Jaka Kurnia Afria Fitri Agustina, Rosita Asep Kadarohman Citra Ibdau Rahmah Desi Kusumawati Devi Indah Anwar Devia Indriani Dikdik Mulyadi Dikdik Mulyadi Fauzia, Wafa Fitri Khairani Nasution Iim Sulaeman Rohana Iljannah, Nissa Irmanida Batubara Isman Kurniawan Isnaini Rahmawati Karisma, Siska La Ode Sumarlin Laksono Trisnantoro Latifah Kosim Darusman LATIFAH KOSIM DARUSMAN Lela Lailatul Khumaisah Lestari, Sintia Nur Laila Arizal Purwoko, Agus Rahmah, Citra Ibdau Ratna Istianah Reni Mulyani Riza Rizki Islani Rizki, Alfath Muhammad Salih Muharam Sapitri, Nazwa Martina Sintia Lestari Sita Sopatul Marwah Siti Inayah Turdini, Shopi Wicaksana, Septiar Agung Winda Apriandari Yulia Mariana Tessa Ayudia Putri Yusri Mutia Fauziyah

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