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Removal of metronidazole from simulated wastewater using Fe/C catalyst with a combination of heterogenous Fenton and ozonation Panandita, Budi Satria; Prasetyo, Imam; Ariyanto, Teguh
Jurnal Rekayasa Proses Vol 17 No 2 (2023): Volume 17, Number 2, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.75633

Abstract

This study examined roles of iron oxide/porous carbon material (Fe/C) for removing metronidazole in simulated wastewater by adsorption and then followed by a degradation using advanced oxidation process (H2O2, O3 and combination of H2O2/O3). Fe/C was produced by an impregnation of iron oxide precursors during resorcinol-formaldehyde synthesis followed by pyrolysis at 800 °C. For comparison, blank carbon (without iron loading) was also synthesized. The properties of porous carbon were investigated by SEM-EDX and N2-sorption analyzer. Blank carbon and Fe/C featured the specific surface area of 755 m2g-1 and 394 m2g-1, respectively. The loading of iron oxide altered the pore structures of material. The adsorption isotherm data were followed by the Langmuir isotherm model with metronidazole uptake up to 46.07 mg g-1 and 39.97 mg g-1 at 30oC by Fe/C and blank carbon. The degradation study was then carried out with catalyst dosage of 0.1 g/100 mL solution and 120 min reaction time at 30 oC. It is noticeably that, the degradation of metronidazole was better when a combination of H2O2/O3 was employed, compared with an individual of H2O2 or O3. Regarding the stability, Fe/C maintained its high activity upon four consecutive runs.
EXPERIMENTAL FLEXURAL STRENGTH OF GLASS FIBER REINFORCED POLYMER (GFRP) HYBRID REINFORCED CONCRETE BEAMS Lestyowati, Yoke; Herawati, Henny; Panandita, Budi Satria
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.67972

Abstract

Materials technology is an excellent opportunity to be developed industrially and on a needs scale according to the demands of society, namely supporting the environment, low maintenance, and long-term use. Using composite materials with reinforced polymers is a hot topic of discussion in civil engineering as new materials, strength/stiffness enhancers, or applications in building rehabilitation or renovation. Fiber Reinforced Polymer (FRP) is excellent as a new material because, in addition to being lightweight, corrosion resistant, and easy to work with, it also has high flexural strength, so it is a consideration to replace and or strengthen steel materials that are high in cost value. However, until now there has not been found the correct pattern or variant and volume of fibre so that it can be an alternative to the use of steel. The purpose of the study was to experimentally determine the flexural strength of Glass Fiber Reinforced Polymer (GFRP) hybrid beams either with steel reinforcement, with GFRP reinforcement, or with steel and GFRP combination reinforcement and different GFRP ratios (variants) through two-point load bending tests.The designed model is a development of a previous study that used one layer of 4 mm and produced a flexural strength smaller than the targeted flexural strength, so in this study, two layers of 8 mm were used. In addition, other experimental data that has been carried out from the literature is also used where the results of parametric studies provide evidence of the positive effect of hybrid steel and GFRP reinforcement ratios when obtaining GFRP models and volumes.The materials used to manufacture concrete beam test specimens 53x15x15 cm3 with quality of fc'35MPa have been tested according to SNI standards and meet both the minimum and maximum requirements specified. Based on the results of the material test, it is planned that the characteristic concrete quality fcr'=40.31 MPa, and based on the compressive strength test, the quality fcr'=41.68MPa is produced.The hybrid designed material with concrete or concrete and steel has been tensile tested with a maximum arcing load for the two layers = 8 mm variant; the tensile strength of the GFRP woven roving type with two layers 2 x 4 mm is 92.66 MPa. While plain steel reinforcement Diameter 8mm quality 280 MPa has a minimum tensile strength of 350 MPa (3.8 times the tensile strength of GFRP 8 mm).The results of testing and calculating the effect of GFRP as a substitute for steel reinforcement contributed to the flexural strength of concrete beams on average by 47.52%. In comparison, the contribution of flexural strength produced by concrete with steel reinforcement was 107.09%. The concrete variant of hybrid steel reinforcement and GFRP contributes to an increase in the average flexural strength of 117.02% 4.8% compared to steel-reinforced concrete beams alone.
SISTEM INFORMASI ADMINISTRASI DAN GEOGRAFIS DESA BARU DI KECAMATAN SILAT HILIR KABUPATEN KAPUAS HULU PROVINSI KALIMANTAN BARAT Herawati, Henny; Lestyowati, Yoke; Kartini, Kartini; Yulianto, Eko; Elvira, Elvira; Panandita, Budi Satria; Ibrahim, Ibrahim
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 7, No 4 (2023): December
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v7i4.20023

Abstract

ABSTRAKKecamatan Silat Hilir merupakan salah satu kecamatan di Kabupaten Kapuas Hulu, Kalimantan Barat dan memiliki 13 desa. Kendala utama dalam pelayanan administrasi bagi masyarakat adalah pelayanan administrasi dilakukan dengan cara manual. Belum tersedianya sistem informasi guna mempercepat penyelesaian pelayanan. Pada proses pelayanan adminstrasi telah menggunakan perangkat komputer, namun penyimpanan data masih menggunakan sebuah buku besar untuk menulis data surat administrasi warga. Hal ini menyebabkan masih banyak keluhan dari masyarakat terkait prosedur yang belum teratur, tidak ada kepastian jangka waktu, sehingga masyarakat menilai petugas tidak profesional berakibat timbulnya citra yang kurang baik terhadap pemerintah. Berdasarkan analisis situasi dan permasalahan yang ada, maka tujuan dari kegiatan ini adalah menyediakan sistem informasi administrasi dan geografis untuk Desa Baru di Kecamatan Silat Hilir. Pengabdian Kepada Masyarakat ini dilakukan dengan metode: penjelasan/pemaparan secara langsung kepada penyelenggara pelayanan yang membutuhkan informasi tentang sistem informasi, menyediakan manual, serta pelatihan bagi penyelenggara pelayanan untuk menggunakan sistem informasi desa yang dibuat. Mitra sasaran dari kegiatan ini adalah perangkat Desa Baru khususnya dan juga camat dan staf administrasi di Kecamatan Silat Hilir. Mitra yang hadir pada kegiatan ini terdiri dari camat, kepala desa, staf kecamatan dan staf desa yang berjumlah 23 peserta. Hasil dari kegiatan ini berupa: (1) Menyampaikan informasi mengenai sistem informasi berupa penjelasan singkat, manfaat, dan contoh-contoh sistem informasi yang ada; (2) Mensosialisasikan pentingnya sistem informasi administrasi dan geografis bagi penyelenggara pelayanan, terutama di desa Baru di Kecamatan Silat Hilir dan desa sekitarnya; (3) Mengadakan pelatihan kepada penyelenggara pelayanan di Desa Baru agar dapat menggunakan sistem informasi dengan baik sesuai dengan kebutuhan penyelenggara pelayanan. Kata kunci: sistem informasi; geografis; desa; pelayanan desa; desa baru. ABSTRACTThe Silat Hilir Sub-district, situated in the Kapuas Hulu Regency of West Kalimantan, comprises 13 villages. The main challenge in delivering administrative services to the community lies in the manual execution of administrative tasks. The absence of an information system hinders the prompt completion of services. Although computer tools are utilized in the administrative process, data storage still relies on a ledger for recording citizens' administrative correspondence. This leads to numerous objections from the community due to irregular procedures and the lack of defined timeframes, resulting in an alleged lack of professionalism among officials, negatively impacting the government's image. Based on an analysis of the current situation and issues, several solutions have been implemented: (1) Disseminating information about information systems through brief explanations, elucidating their benefits, and providing examples of existing systems; (2) Advocating the importance of administrative and geographic information systems for service providers; (3) Conducting training for service providers in Baru village to proficiently use the information system according to their service requirements. This community engagement involves direct presentations to service providers in need of information about information systems, supplying manuals, and offering training for service providers to utilize the village information system. Keywords: information sistem; geographic; village; village services; baru village.