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All Journal Al-Kimia ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Logistik Indonesia Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat
Nina Ariesta
Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Social Sciences Other

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Sulfonated Nano-bentonit as Doping Material in Chtiosan/PVA membrane in Fuel cell Application Ariesta, Nina
ALKIMIA Vol 5 No 1 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (625.768 KB) | DOI: 10.19109/alkimia.v5i1.10220

Abstract

Electrolyte membrane of fuel cell is the main component that plays a role in separating the reactants and being a means of transporting hydrogen ions produced by the anode reaction to the cathode so that the reaction at the cathode produces electrical energy. Chitosan/PVA/Nanobentonite based membrane was made of natural bentonite form Karang Tengah, Bogor. The study was conducted to know the effect of particle size of doping materials added to chitosan/PVA membrane for fuel cell. The method used in the experiment was casting method with variation of concentration of sulfonated bentonite. Then, membranes were namely C/PVA/n-ben 0.3, 0.6 and 0.9. The membrane that had been synthesized was identified by swelling test, proton conductivity test and cation exchange capacity test then characterized by FTIR, SEM and XRD. The result of the experiment showed the best swelling test was presented on the membrane with concentration of 0.9% sulfonated bentonite by 62.79% and the best proton conductivity test was shown on a membrane with a concentration of 0.6% sulfonated bentonite which was 2.24 x 10-6 S/cm, supported by the result of the cation exchange capacity data.
Utilization Waste Materials to Synthesize Nano Al2O3-CaO Photocatalyst using Infused Red Guava Leaves (Psidium Guajava L.) Rodiah, Siti; Aprilia, Riana; Ariesta, Nina
Al-Kimia Vol 10 No 2 (2022): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v10i2.33481

Abstract

Diazinon is a very toxic pesticide for animals and humans that is widely used in the agricultural sector, so this pollutant needs to be reduced or eliminated in the environment through photodegradation using photocatalysts derived from metal oxides. The catalytic activity of metal oxides is enhanced by adding a support material and increasing the surface area by reducing the particle size to nano size. In this study, kaolin as a source of Al2O3 and golden snail shells as a source of CaO which used to synthesize Al2O3-CaO nanoparticles (NPs) with a simple and environmentally friendly method using plant infusions. Synthesis of Al2O3-CaO NPs using infused red guava leaves (Psidium guajava L.) had been done by utilized the secondary metabolites as reducing agents and stabilizers in the nanoparticle synthesis. FTIR analysis confirmed the presence of alumina (Al-O) groups at wave numbers 850 – 650 cm-1 and CaO at 3642 cm-1. XRD analysis showed NPs Al2O3-CaO had cubic with the crystal size of 14.59 nm. The morphology of Al2O3-CaO NPs showed in the SEM pictures were agglomerated. Al2O3-CaO NPs degraded diazinon by 75% within 180 minutes under UV radiation. Thus, this research not only reduce waste material, but also reduces water pollutant.
TEPUNG TALAS VARIETAS BARU SEBAGAI BAHAN BAKU COOKIES KWT SAWARGI KELURAHAN SITU GEDE KECAMATAN BOGOR BARAT Nurilmala, Febi; Ariesta, Nina; Nurlela, Nurlela; Widhyastini, IGA Manik; Azizah, Mia
Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat Vol. 1 No. 2 (2022): Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.245 KB) | DOI: 10.31938/jai.v1i2.419

Abstract

The purpose of the following community service activity is to educate KWT Sawargi members through counselling on the use of new varieties of taro plants Febi521 and its post-harvest processing for processed taro production houses, as well as preparing activity plans for implementing the use of new varieties of taro Febi521 and its post-harvest processing. The target group of this activity are the residents of the Women Farmers Group (KWT) Sawargi, Situ Gede Village, West Bogor District, Bogor City. This Community Service activity can be divided into three stages: preparation, implementation, and evaluation. The results of this activity have a positive impact on increasing knowledge and skills and have the potential to improve the economy of the community. KWT members have a new understanding of the new taro variety Febi521, which has the advantage of not itching due to low levels of calcium oxalate. KWT also knows the nutritional value of Febi521 taro. In addition, KWT members also understand Febi521's post-harvest processing techniques and skills in processing taro products in the form of cookies made from taro flour. Sustainability support of this activity, the team provided new varieties of taro seeds Febi521 and production tools for post-harvest processing of taro.Keywords: taro; Febi521, post-harvest, taro flour, cookiesAbstrakKegiatan pengabdian masyarakat bertujuan untuk edukasi kepada mitra KWT Sawargi melalui penyuluhan pemanfaatan tanaman talas varietas baru Febi521 dan pengolahan pascapanennya dan menyusun rencana aktivitas implementasi pemanfaatan tanaman talas varietas baru Febi521. Kegiatan pengabdian kepada masyarakat ini dibagi dalam tiga tahap yaitu, persiapan, pelaksanaan, dan evaluasi. Hasil kegiatan ini memberikan dampak positif terhadap peningkatan pengetahuan, keterampilan, dan berpotensi meningkatkan perekonomian masyarakat Kelurahan Situ Gede, Kecamatan Bogor Barat, Kota Bogor. Anggota KWT memiliki pemahaman yang baru tentang talas varietas baru Febi521 yang memiliki keunggulan tidak gatal karena rendahnya kadar kalsium oksalat. KWT juga memiliki pengetahuan tentang nilai gizi talas Febi521. Selain itu, para anggota KWT juga memahami teknik pengolahan pascapanen talas Febi521 serta memiliki keterampilan dalam mengolah produk olahan talas berupa cookies berbahan dasar tepung talas. Untuk mendukung keberlanjutan kegiatan ini, tim memberikan bibit talas varietas baru Febi521 dan alat produksi olahan talas pascapanen.Kata Kunci: talas, Febi521, pascapanen, tepung talas, cookies
Feasibility Analysis of Rumah Produksi Bersama (RPB) for Chili Commodities as Investment Promotion in Batubara Regency, North Sumatra Susanto, Heri; Suwarnata, Anak Agung Eka; Ariesta, Nina; Maad, Faizal
Jurnal Logistik Indonesia Vol. 8 No. 1: April 2024
Publisher : Institut Ilmu Sosial dan Manajemen Stiami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31334/logistik.v8i1.3836

Abstract

Chili is a strategic agricultural commodity that has high economic value and makes a real contribution to the national economy. The biggest problem in the chili trade system is price stabilization. Unstable prices occur when there is a change in supply volume. Based on BPS data in 2021, North Sumatra is the largest chili center outside Java with a contribution of 14.16%. Followed by West Sumatra and Aceh contributing 8.27% and 4.6% respectively. The center for red chili production in North Sumatra Province is Batu Bara Regency, which has an area of 982 ha with a productivity of 8 tons/hectare for red chilies, apart from Karo, Simalungun and Dairi. One way to overcome the chili problem in Batu Bara Regency is with the Rumah Produksi Bersama (RPB) program, which is a place for micro and small business actors to carry out joint production activities with similar product commodities, dependence on similar workforce skills, or the use of complementary technologies. Apart from that, RPB is a promotion for regional government investment in developing their region (Regional Branding) in addition to differentiating products and increasing value. For this reason, a Feasibility Study Method for the RPB KUKM for chili commodities in Batu Bara Regency, North Sumatra Province is needed, including through location, Production, Marketing, Financial and Management analysis as well as reviewing the regional image. Based on the results of the feasibility study, it was found that the location of the RPB is in chili, Lubuk Cuik Village, Limapuluh Pesisir District, Batu Bara Regency, North Sumatra Province, which is not far from the chili center in Batu Bara Regency. To achieve feasibility in accordance with the capabilities of RPB cutlery, it must be able to produce a minimum of 20 tons per month or around 240 tons per year with this production NPV, IRR and PP can be said to be feasible. Meanwhile, marketing is carried out B2B and B2C for potential offtakers, apart from building public-private partnerships and involving all key stakeholders, with the main player being the government.
Green Synthesis of CaO Nanoparticle from Chicken Eggshell using Lemongrass Leaf Water Extract Wardhani, Gladys Ayu Paramita Kusumah; Ariesta, Nina
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.17859

Abstract

Sources of CaO in the synthesis of nanoparticles can be available from waste such as eggshell waste which has an average CaCO3 content of 94%. The study aimed to synthesize nanoparticles with various compositions of CaO-0 and CaO-1  (50 : 50) yielded from chicken egg shells mediated by extracts Cymbopogon citratus leaves and characterized the nanoparticles. Based on the results of phytochemical screening, Cymbopogon citratus extract contained alkaloids, flavonoids, triterpenoids, and tannins. The results of characterization with UV-Vis spectrophotometer showed that CaO was formed at the highest wavelength with a composition of CaO-1 (50 : 50) with a value of 250-300 nm. Absorption band of FT-IR spectra at wave numbers 428 cm-1 and 711 cm-1, it’s indicate of Ca-O vibrational band and Ca-O bonds, respectively. The particle size of crystalline CaO-0 based on calculations using the Debye Scherrer formula ranged from 33.72 - 38.48 nm while the particle size of crystalline CaO-1 ranged from 28.93 - 70.75 nm with diposide and calcite phases based on XRD data. The surface morphology using SEM shown that CaO-0 was shaped like an irregular cube while CaO-1 forms irregular spherical lumps. Keywords: CaO, green synthesis, Cymbopogon citratus, nanoparticle .
Co-Authors Faizal Maad Febi Nurilmala Gladys Ayu Paramita Kusumah Wardhani Heri Susanto Mia Azizah Nurlela Nurlela Riana Aprilia, Riana siti rodiah Suwarnata, Anak Agung Eka Widhyastini, IGA Manik