Garuda - Garba Rujukan Digital

Indonesian Modified Clay for Dye Waste Treatment Iwan Sumarlan; Is Fatimah; Karna Wijaya
Acta Chimica Asiana Vol. 3 No. 1 (2020)
Publisher : Chemistry Education Program, the University of Mataram

Synthesis and Characterization of TiO2 Coated on Clay Pillared Alumina (PILC) for Methyl Orange Photodegradation Under UV Illumination. The synthesis included both pillarization the clay with alumina and TiO2 coated on PILC using impregnation method. Some characterizations also were employed to this research such as X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), N2 Adsorption Isotherm and UV-Visible Diffuse Reflectance (DR UV). The photocatalyst was then used to decompose waste dye, methyl orange (MO). Among three photocatalysts that were successfully synthesized, PILC Ti 1.0% had the highest activity to decompose the waste dye.

Synthesis of Rice Husk Mesoporous Silica as pH Responsive Release Material Pidia Aulia; Saprini Hamdiani; Iwan Sumarlan
Acta Chimica Asiana Vol. 2 No. 2 (2019)
Publisher : Chemistry Education Program, the University of Mataram

The synthesis of mesoporous silica as a delivery agent for the ethyl para-methoxycinnamate has been carried out. The study aims to determine the process of mesoporous silica synthesis from sodium silicate from the smelting of rice husk ash, determine the adsorption capacity of mesoporous silica in the ethyl para-methoxycinnamate and the pH responsive release of ethyl para-methoxycinnamate with mesoporous silica as a delivery agent in simulated intestinal and gastric fluids. It was found that mesoporous silica can be synthesized from rice husk ash with a 30% tartaric acid template. Characterization of mesoporous silica using FTIR spectroscopy showed the presence of silanol (Si-OH) and siloxane (Si-O-Si) functional groups. Mesoporous silica from rice husk ash is able as adsorbent for the ethyl para-methoxycinnamate with the adsorption capacity of 8.26 mg/g. The release test of gastric simulation fluid (pH 1.2) showed that the ethyl-para-methoxycinnamate was released from silica for a period of 12 hours. In the intestinal simulation fluid (pH 7.4), the release of the ethyl para-methoxycinnamate occurred slowly at the first hour, then gradually increased at 5 hour up to 12 hour.

Benzimidazole corrosion inhibition performance: A DFT Study Farid Wajdi; Saprizal Hadisaputra; Iwan Sumarlan
Acta Chimica Asiana Vol. 1 No. 2 (2018)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v1i2.27

The corrosion inhibition performance of benzimidazole and its derivatives have been studied by density functional theory DFT in aqueous medium. For this investigation, the corrosion inhibition efficiencies of the protonated and non-protonated spesies of benzimidazole and its derivatives were investigated. The ionization potential of the inhibitors has a strong influence on the efficiency of corrosion inhibitors. The linear correlation was shown between electronic properties and corrosion inhibition efficiency. Electron donating substituents increase the corrosion inhibition efficiency, whereas electron withdrawing substituents give the opposite effect. The NH2 substituent contributes highest, whereas NO2 provides the weakest contribution to the corrosion inhibition efficiency for both non-protonated and protonated species of inhibitors.

Esterification of Waste Cooking Oil using Heterogeneous Catalyst from Pearl Shell Iwan Sumarlan; Rona B. Mentari
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

Biodiesel is a renewable and environmentally friendly energy source. The process of using a homogeneous catalyst has several disadvantages, such as: removing a lot of waste water from washing the catalyst residue and cannot be reused. This catalyst is also low in corrosion and is more environmentally friendly. The purpose of this study was to study the preparation of heterogeneous catalysts from pearl shells applied to the cooking oil esterification reaction. The oil was then characterized by the XRD, XRF, SEM, and FTIR. The results of GCMS for reaction without catalysts yield only 27.07% by weight of alkyl ester, whereas using a catalyst is 93.4%. The influence of time, in the 60th minute, was the optimal time for the esterification reaction, and the effect of the weight of the catalyst which was 1% the optimal weight. This shows that pearl oyster shell catalyst can act as an esterification catalyst for used cooking oil and can be used as an alternative to a homogeneous catalyst substitute catalyst.

APLIKASI CHEMDRAW DAN AVOGADRO UNTUK MENINGKATKAN PEMAHAMAN DAN MINAT DALAM BIDANG KIMIA Emmy Yuanita; Sudirman Sudirman; Maria Ulfa; Ni Komang Tri Dharmayani; Iwan Sumarlan; I Made Sudarma
Jurnal Pendidikan dan Pengabdian Masyarakat Vol. 1 No. 2 (2018): Agustus
Publisher : FKIP Universitas Mataram

In the industrial era 4.0, it is expected that the technology-based education system can be realized specifically in chemistry. One alternative in improving understanding and interest in chemistry is by ChemDraw and Avogadro applications. This research was conducted by providing training to teachers and students of ChemDraw and Avogadro applications which before and after the field data was collected by questionnaire. Significant data shown by chemistry teachers in Lombok island are few who know ChemDraw and hardly know about Avogadro. The hardest part of learning chemistry is to imagine the structure and bond in the molecule. From this exercise programmed participants are able to draw molecules both 2D and 3D. In the end the participants can draw simple to supramolecular structures with ChemDraw and Avogadro applications. Hopefully this activity can function to increase students' interest in learning chemistry.

Esterification of Waste Cooking Oil using Heterogeneous Catalyst from Pearl Shell Iwan Sumarlan; Rona B. Mentari
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i3.pp183-190

Biodiesel is a renewable and environmentally friendly energy source. The process of using a homogeneous catalyst has several disadvantages, such as: removing a lot of waste water from washing the catalyst residue and cannot be reused. This catalyst is also low in corrosion and is more environmentally friendly. The purpose of this study was to study the preparation of heterogeneous catalysts from pearl shells applied to the cooking oil esterification reaction. The oil was then characterized by the XRD, XRF, SEM, and FTIR. The results of GCMS for reaction without catalysts yield only 27.07% by weight of alkyl ester, whereas using a catalyst is 93.4%. The influence of time, in the 60th minute, was the optimal time for the esterification reaction, and the effect of the weight of the catalyst which was 1% the optimal weight. This shows that pearl oyster shell catalyst can act as an esterification catalyst for used cooking oil and can be used as an alternative to a homogeneous catalyst substitute catalyst.

PELATIHAN TEKNIK EKSTRAKSI MINYAK SEDERHANA KEPADA UMKM DI PURA LINGSAR KABUPATEN LOMBOK BARAT Hamdiani, Saprini; Hermanto, Dhony; Sudirman, Sudirman; Sumarlan, Iwan; Kamali, Siti Raudhatul; Ismillayli, Nurul; Sari, Ayu Purnama; Iriando, Mahadi Muhammad Gunadharma
Jurnal Pepadu Vol 5 No 3 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i3.5879

Di Kecamatan Lingsar Kabupaten Lombok Barat terdapat UMKM yang bergerak di bidang produksi Minyak Nagasari. Minyak ini diperoleh dari Tanaman Nagasari yang banyak tumbuh dikawasan Pura Lingsar. Minyak ini memiliki khasiat untuk mengobati penyakit gatal-gatal, sehingga dijadikan oleh-oleh bagi wisatawan yang berkunjung ke tempat wisata tersebut. Namun kualitas minyak masih rendah dan pengemasan masih sangat tradisional. Oleh karena itu, kegiatan ini bertujuan untuk meningkatkan pemahaman para anggota UMKM tentang teknik sederhana ekstraksi minyak dan pengemasan produk. Kegiatan pengabdian dilaksanakan pada tanggal 14 Mei 2024 melalui sosialisasi dan pelatihan dengan metode focus group discussion (FGD). Terdapat 5 kelompok yang masing-masing beranggotakan 3 orang. Tiap kelompok diberi pemahaman dan praktek teknik ekstraksi yang baik. Setelah pelaksanaan pengabdian, pemahaman anggota UMKM meningkat sebanyak 81.25%. Selain pelatihan, para anggota UMKM diberikan pemahaman tentang penggunaan kemasan yang baik akan berpengaruh terhadap keinginan konsumen untuk membeli. Pengemasan yang baik terhadap minyak Nagasari selama periode 3 bulan, Mei-Juni 2024, meningkatkan omzet penjualan Minyak Nagasari sebanyak 37.67%. Kegiatan ini telah meningkatkan pemahaman dan perekonomian para anggota UMKM Minyak Nagasari di Pura Lingsar.

Sustainable development through raw material diversification in the Banyumulek pottery industry community on Lombok Island Hamdiani, Saprini; Kamali, Siti Raudhatul; Hadisaputra, Saprizal; Arisanti, Ivon; Hidayatullah, M. Riski; Anshori, Mufid; Azzauri, Supyan; Indriyatno; Sumarlan, Iwan
Transformasi: Jurnal Pengabdian Masyarakat Vol. 20 No. 2 (2024): Transformasi Desember
Publisher : LP2M Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/transformasi.v20i2.11182

[Bahasa]: Gerabah merupakan salah satu produk unggulan daerah di Desa Banyumulek Kabupaten Lombok Barat, Provinsi Nusa Tenggara Barat. Industri ini telah berlangsung lebih dari setengah abad, dan menjadi mata pencaharian pokok hampir 80% masyarakat di Desa Banyumulek. Kegiatan pengabdian ini bertujuan untuk sosialisasi dan praktek penerapan teknologi material komposit menggunakan bahan alternatif untuk pembuatan gerabah. Bahan alternatif yang digunakan berasal dari limbah abu pembakaran gerabah. Tim pengabdian bermitra dengan KIAT Gerabah Lombok, yang merupakan kelompok pengrajin gerabah beranggotakan 25 orang. Selain itu, kegiatan ini bertujuan untuk mengurangi dampak negatif dari limbah abu dan meningkatkan nilai ekonomisnya. Pengabdian dilakukan dengan metode Participatory Action Research (PAR) dan Focus Group Disscussion (FGD). Penerapan kedua metode dapat meningkatkan pemahaman dan pengetahuan para peserta pengabdian tentang diversifikasi dan teknik pembuatan gerabah dengan teknologi komposit sebanyak 30-80%. Sedangkan indeks kepuasan peserta pengabdian menunjukkan sebanyak 76% peserta pengabdian merasa puas dan sangat puas terhadap pelaksanaan kegiatan. Diversifikasi bahan baku dalam pembuatan gerabah, diharapkan dapat menjaga keberlangsungan industri gerabah di Desa Banyumulek sebagai menjadi salah satu warisan budaya dan produk unggulan daerah yang perlu dilestarikan. Kata Kunci: gerabah, diversifikasi, limbah abu pembakaran, Banyumulek, teknologi komposit [English]: Pottery is a leading regional product in Banyumulek Village, West Lombok Regency, West Nusa Tenggara Province. The industry, which has existed for over half a century, serves as the primary livelihood for nearly 80% of Banyumulek's population. This community service activity aimed to introduce and practice composite material technology using alternative materials derived from pottery firing ash waste. The service partnered with KIAT Gerabah Lombok, a pottery artisans' group with 25 members. The objectives included mitigating the negative impacts of firing ash waste and enhancing its economic value. Employing Participatory Action Research (PAR) and Focus Group Discussion (FGD) methods, the activities improved participants' understanding of diversification and composite technology pottery techniques by 30-80%. The participant satisfaction index revealed that 76% were satisfied or very satisfied with the activity. Diversifying raw materials in pottery making is expected to sustain the pottery industry in Banyumulek Village, preserving it as a cultural heritage and regional hallmark. Keywords: pottery, diversification, firing ash waste, Banyumulek, composite technology

PELATIHAN TEKNIK EKSTRAKSI MINYAK SEDERHANA KEPADA UMKM DI PURA LINGSAR KABUPATEN LOMBOK BARAT Hamdiani, Saprini; Hermanto, Dhony; Sudirman, Sudirman; Sumarlan, Iwan; Kamali, Siti Raudhatul; Ismillayli, Nurul; Sari, Ayu Purnama; Iriando, Mahadi Muhammad Gunadharma
Jurnal Pepadu Vol 5 No 3 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i3.5879

Di Kecamatan Lingsar Kabupaten Lombok Barat terdapat UMKM yang bergerak di bidang produksi Minyak Nagasari. Minyak ini diperoleh dari Tanaman Nagasari yang banyak tumbuh dikawasan Pura Lingsar. Minyak ini memiliki khasiat untuk mengobati penyakit gatal-gatal, sehingga dijadikan oleh-oleh bagi wisatawan yang berkunjung ke tempat wisata tersebut. Namun kualitas minyak masih rendah dan pengemasan masih sangat tradisional. Oleh karena itu, kegiatan ini bertujuan untuk meningkatkan pemahaman para anggota UMKM tentang teknik sederhana ekstraksi minyak dan pengemasan produk. Kegiatan pengabdian dilaksanakan pada tanggal 14 Mei 2024 melalui sosialisasi dan pelatihan dengan metode focus group discussion (FGD). Terdapat 5 kelompok yang masing-masing beranggotakan 3 orang. Tiap kelompok diberi pemahaman dan praktek teknik ekstraksi yang baik. Setelah pelaksanaan pengabdian, pemahaman anggota UMKM meningkat sebanyak 81.25%. Selain pelatihan, para anggota UMKM diberikan pemahaman tentang penggunaan kemasan yang baik akan berpengaruh terhadap keinginan konsumen untuk membeli. Pengemasan yang baik terhadap minyak Nagasari selama periode 3 bulan, Mei-Juni 2024, meningkatkan omzet penjualan Minyak Nagasari sebanyak 37.67%. Kegiatan ini telah meningkatkan pemahaman dan perekonomian para anggota UMKM Minyak Nagasari di Pura Lingsar.

Development of Green Composite Based on Recycled-Low Density Polyethylene (r-LDPE) as an Environmentally Friendly Packaging Hamdiani, Saprini; Kamali, Siti Raudhatul; Ismillayli, Nurul; Kurniawati, Lely; Sumarlan, Iwan
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i3.6836

Low-Density Polyethylene (LDPE) is one of the most popular and commonly used petroleum-derived thermoplastics for packaging. The large production of LDPE has an environmental impact. Reducing production can be done by recycling LDPE (r-LDPE) and adding organic fibres as a filler that is easily decomposed. Cattle farming solid waste as a fibre source was mixed with r-LDPE with coupling agent maleic anhydride (MA). Before use, the cow manure was processed through a bleaching and hemicellulose removal process, which resulted in Cow Manure Fiber (CMF). The CMF was analyzed using FTIR spectroscopy and microscopic fibre dimension analysis. The FTIR results showed peaks at wavenumbers 3538 and 1056 cm-1, representing the -OH, -C-O and -CH functional groups from the cellulose structure. The resulting composites were tested for physical properties, including elastic modulus, yield stress, and elongation. Pure LDPE material was also used for comparison. The best physical properties of the composites were obtained by composites with 95% r-LDPE, 5% CMF, and 2% MA.

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search