Online Journal Universitas Bangka Belitung
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Pengaruh Temperatur Aktivasi Karbon Aktif Terhadap Adsorpsi Logam Besi (Fe) Pada Limbah Batik Cair Batik Cual
Get PDFBatik cual waste is a problem that is quite dangerous if it is disposed of directly into the environment because it contains various kinds of heavy metals such as iron Fe. To overcome the problem by utilizing coconut shell as activated carbon. In this study, the activated carbon used was the result of chemical activation and physical activation processes using temperatures of , and . Based on the SEM results to determine the sphericity value for a temperature of is worth 0.47 for is worth 0.56 and for is worth 0.52. The value of the pore diameter of activated carbon at temperatures of , and is 40.11µm, 81.84µm and 55.50µm. The BET results for activated carbon have a total pore volume for temperatures of , and with values of 0.182 cc/g, 0.2315 cc/g and 0.1605 cc/g. To decadarize cual batik wastewater through the adsorption process, temperatures of , and were used with contact times of 0, 40, 80, 120 and 160 minutes. The adsorption results were carried out by kinetic modeling using first-order, second-order and BMG kinetic models. Based on the model that is most suitable for the adsorption of liquid batik wastewater is BMGBatik cual waste is a problem that is quite dangerous if it is disposed of directly into the environment because it contains various kinds of heavy metals such as iron Fe. To overcome the problem by utilizing coconut shell as activated carbon. In this study, the activated carbon used was the result of chemical activation and physical activation processes using temperatures of , and . Based on the SEM results to determine the sphericity value for a temperature of is worth 0.47 for is worth 0.56 and for is worth 0.52. The value of the pore diameter of activated carbon at temperatures of , and is 40.11µm, 81.84µm and 55.50µm. The BET results for activated carbon have a total pore volume for temperatures of , and with values of 0.182 cc/g, 0.2315 cc/g and 0.1605 cc/g. To decadarize cual batik wastewater through the adsorption process, temperatures of , and were used with contact times of 0, 40, 80, 120 and 160 minutes. The adsorption results were carried out by kinetic modeling using first-order, second-order and BMG kinetic models. Based on the model that is most suitable for the adsorption of liquid batik wastewater is BM
Identifikasi Kestabilan Tanggul Waduk Desa Kemuja Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner
Get PDFThe dam of Kemuja Village, constructed in 2015, is located in Kemuja Village, West Mendo District, Bangka Regency. The reservoir is surrounded by embankments designed to prevent flooding in the surrounding rice fields. An initial survey indicated that the embankments have an average height of approximately 2.6 meters from the ground surface, with a water level of around 1 meter above the surface. This study aims to assess the stability of the reservoir embankments through 2D modeling using the Wenner configuration resistivity geoelectric method, with an electrode spacing of 8 meters. The results indicate that the embankments exhibit overall structural stability across most sections. However, areas of potential instability were identified in specific locations, including Track 1 at depths of 0–1 m with a measurement range of 10–14 m, Track 2 at depths of 0–1 m within 36–40 m, Track 3 at depths of 0.5–2 m within 6–8 m, 0–1.5 m within 12–16 m, and 0–2 m within 28–30 m, as well as Track 4 at depths of 0–1 m within 8–10 m and 0–2 m within 44–48 m. These findings provide valuable insights into the structural integrity of the embankments and can inform future maintenance and reinforcement efforts.Kemuja Village Reservoir is one of the reservoirs located in Kemuja Village, West Mendo District, Bangka Regency, which was built in 2015. On the sides of the Kemuja Village Reservoir, there are embankments that are used to prevent flooding of rice fields. Based on the initial survey, the height of the embankment from the ground is ±2.6 m and the water level is ±1 m above the surface. This study aims to identify the stability of the Kemuja Village reservoir embankment based on 2D modeling using the Wenner configuration resistivity geoelectric method with a spacing of 8 m between electrodes. Based on 2D modeling, the Kemuja Village reservoir embankment has good stability on all tracks, except on track 1 at a depth of 0 m - 1 m with a measurement distance of 10 m - 14 m, track 2 at a depth of 0 m - 1 m with a measurement distance of 36 m - 40 m, track 3 at a depth of 0.5 m - 2 m with a measurement distance of 6 m - 8 m; 0 m - 1.5 m with a measurement distance of 12 m - 16 m and 0 m - 2 m with a measurement distance of 28 m - 30 m, traverse 4 at a depth of 0 m - 1 m with a measurement distance of 8 m - 10 m and 0 m - 2 m with a measurement distance of 44 m - 48 m
PEMBERDAYAAN MASYARAKAT DI DESA MARGASARI KECAMATAN PASAWAHAN KABUPATEN PURWAKARTA BERBASIS KEAGAMAAN, PENDIDIKAN, DAN SOSIAL-BUDAYA
Get PDFCommunity service through Student Community Service (KKN) in Margasari Village, Purwakarta, aims to empower the community through religious, educational, and socio-cultural approaches. This study identified several challenges in the village, including low levels of education, lack of awareness of environmental cleanliness, and declining spirit of mutual cooperation. An analysis of village conditions shows that most of the population works as farmers or factory workers. The long distance to high school is a barrier for some teenagers to continue their education. In addition, the presence of a final disposal site (TPA) in the village also affects the quality of the environment and public health. To overcome these problems, the community service program focuses on improving the quality of life of the community through various activities. These activities include religious education for youth, increasing awareness of the importance of education, and strengthening socio-cultural values such as mutual cooperation. The results of this program are an increase in the quality of human resources in Margasari Village, the realization of a clean and healthy environment, and the resurgence of the spirit of mutual cooperation in the community. Through an integrated approach between religion, education, and socio-culture, it is expected that this community empowerment program can make a significant contribution to village development.Pengabdian melalui Kuliah Kerja Nyata lewat pemberdayaan masyarakat di Desa Margasari, Purwakarta, bertujuan untuk memberdayakan masyarakat melalui pendekatan keagamaan, pendidikan, dan sosial-budaya. Penelitian ini mengidentifikasi sejumlah tantangan di desa, termasuk rendahnya tingkat pendidikan, kurangnya kesadaran akan kebersihan lingkungan, serta menurunnya semangat gotong royong. Analisis terhadap kondisi desa menunjukkan bahwa sebagian besar penduduk bekerja sebagai petani atau buruh pabrik. Jarak tempuh ke sekolah menengah atas yang jauh menjadi kendala bagi sebagian remaja untuk melanjutkan pendidikan. Selain itu, keberadaan Tempat Pembuangan Akhir (TPA) di desa turut mempengaruhi kualitas lingkungan dan kesehatan masyarakat. Untuk mengatasi permasalahan tersebut, program pengabdian difokuskan pada peningkatan kualitas hidup masyarakat melalui berbagai kegiatan. Kegiatan-kegiatan tersebut meliputi pendidikan keagamaan bagi pemuda, peningkatan kesadaran akan pentingnya pendidikan, serta penguatan nilai-nilai sosial budaya seperti gotong royong. Hasil dari program ini adalah meningkatnya kualitas sumber daya manusia di Desa Margasari, terwujudnya lingkungan yang bersih dan sehat, serta tumbuhnya kembali semangat gotong royong di masyarakat. Melalui pendekatan yang terintegrasi antara agama, pendidikan, dan sosial budaya, diharapkan program pemberdayaan masyarakat ini dapat memberikan kontribusi yang signifikan bagi pembangunan desa
Analisis Pengukuran Taraf Intensitas Bunyi Pengeras Suara Masjid Menggunakan Aplikasi Sound Level Meter
Get PDFNoise pollution can come from various sources around us, such as loudspeakers. In Indonesia, where the majority of the population is Muslim, many mosques use loudspeakers to broadcast the adhan, or call to prayer. Recently, the use of mosque loudspeakers has sparked debate, as some people are concerned that the noise may disrupt their comfort and potentially affect their health. This study aims to assess whether the noise level of the adhan from these loudspeakers is within safe limits or exceeds the threshold that could harm human health. The research involved measuring the sound intensity of the adhan using a sound level meter app. Measurements were taken at two locations: within the mosque courtyard and at a distance of 100 meters from the mosque. The study examined six mosques in Bekasi City, with two mosques located in residential areas, two in office areas, and two in school areas. The results indicate that the highest noise levels were recorded in the mosque courtyards, with levels decreasing as the distance from the mosque increased. Among the six mosques, the highest noise level recorded was 84.5 dB in the mosque courtyard, which is below the threshold set by the Ministry of Manpower Regulation No. 5 of 2018, meaning it is still considered safe for human healthNoise pollution can come from various sources around us, such as loudspeakers. In Indonesia, where the majority of the population is Muslim, many mosques use loudspeakers to broadcast the adhan, or call to prayer. Recently, the use of mosque loudspeakers has sparked debate, as some people are concerned that the noise may disrupt their comfort and potentially affect their health. This study aims to assess whether the noise level of the adhan from these loudspeakers is within safe limits or exceeds the threshold that could harm human health. The research involved measuring the sound intensity of the adhan using a sound level meter app. Measurements were taken at two locations: within the mosque courtyard and at a distance of 100 meters from the mosque. The study examined six mosques in Bekasi City, with two mosques located in residential areas, two in office areas, and two in school areas. The results indicate that the highest noise levels were recorded in the mosque courtyards, with levels decreasing as the distance from the mosque increased. Among the six mosques, the highest noise level recorded was 84.5 dB in the mosque courtyard, which is below the threshold set by the Ministry of Manpower Regulation No. 5 of 2018, meaning it is still considered safe for human health
Advances Systematic Literature Review (SLR): Kemajuan Teknik Lapisan Semprot Pada Sel Surya Ditinjau dari Aspek Efisiensi dan Prospek Komersialisasi
No full textThis systematic review examines recent developments in spray-coated solar cells through analysis of 127 peer-reviewed studies (2019-2024). Our findings highlight significant advances in ultrasonic spray techniques, achieving thickness variations of ±2.5% and perovskite-based device efficiencies reaching 21.7%. Large-scale implementation demonstrated successful coating areas of 1.5 m² while maintaining 90% of lab-scale performance. Despite promising results, stability remains challenging, with typical efficiency losses of 15-20% over 1000 hours. Current trends suggest commercial viability within 3-5 years, contingent upon advances in materials and processing techniques.This systematic review examines recent developments in spray-coated solar cells through analysis of 127 peer-reviewed studies (2019-2024). Our findings highlight significant advances in ultrasonic spray techniques, achieving thickness variations of ±2.5% and perovskite-based device efficiencies reaching 21.7%. Large-scale implementation demonstrated successful coating areas of 1.5 m² while maintaining 90% of lab-scale performance. Despite promising results, stability remains challenging, with typical efficiency losses of 15-20% over 1000 hours. Current trends suggest commercial viability within 3-5 years, contingent upon advances in materials and processing techniques
PENERAPAN TEKNOLOGI WASTAFEL TANPA SENTUH DI TAMAN NGGIRLI DESA WISATA SRIMULYO, KABUPATEN BANTUL
Get PDFSebagai wujud peran aktif dalam menghadapi penanganan covid-19, dibuatlah wastafel portable tanpa sentuh, yakni dengan diinjak menggunakan kaki tanpa adanya sentuhan tangan. Penerapan teknologi wastafel tanpa sentuh ini meliputi perancangan dan fabrikasi wastafel tanpa sentuh, uji coba alat di lapangan, dan sosialisasi kepada masyarakat dan pengelola obyek wisata Taman Nggirli, Bantul. Tahap pertama pelaksanaan program ini adalah dengan mendesain wastafel tanpa sentuh dengan menggunakan aplikasi desain teknik. Tahap kedua dilanjutkan dengan proses fabrikasi yang dilakukan di workshop yang ada di dalam dan luar kampus. Selanjutnya tahap Ketiga yaitu uji coba alat dan sosialisasi kepada para pengelola Taman Nggirli selaku pengguna alat ini. Sosialisasi dilakukan dengan pengenalan wastafel tanpa sentuh dimana para peserta dijelaskan apa perbedaan wastafel tanpa sentuh ini dengan wastafel biasa. Kemudian peserta diajarkan prinsip kerja wastafel tanpa sentuh ini dengan menggunakan pijakan kaki dari pedal yang ada di bawah. Terakhir kemudian dilanjutkan dengan uji coba alat tersebut di lokasi Taman Nggirli. Satu persatu para peserta mencoba wastafel tanpa sentuh ini dengan antusias. Dari uji coba ini terlihat bahwa alat bekerja dengan baik dan dapat digunakan sebagaimana mestinya.In response to the Covid-19 pandemic, a touchless portable sink has been developed. This innovative sink allows users to operate it by simply stomping on it with their feet, eliminating the need for hand contact. The implementation of touchless sink technology includes the design and production of touchless sinks, field testing of the equipment, and communication with the community and operators of the Wisata Taman Nggirli in Bantul. The initial phase of this program involves designing a touchless sink by utilizing engineering design programs. The second step proceeded with the manufacturing process, which took place in workshops located inside and outside the campus. Following that, the third phase involves conducting tests on the site and reaching out to the staffs of Taman Nggirli to engage them as users of this device. Participants were socialized through the introduction of touchless sinks, accompanied by an explanation of the distinction between touchless sinks and conventional sinks. Next, the participants are instructed on the operational mechanism of the touchless sink by demonstrating the use of a footrest located beneath the pedal. Finally, a testing of the device was conducted at the Taman Nggirli. Each participant eagerly attempted to use this touchless sink, one after another. Based on this testing, it is evident that the device functions effectively and may be utilized as intended
PENGUATAN PENGETAHUAN MENGENAI BULLYING UNTUK ANAK SEKOLAH DASAR GMIH DAEO MALUKU UTARA
Get PDFBullying is a pattern of aggressive behavior, the most vulnerable children face a higher risk of being bullied. The Halmahera Christian Church (GMIH) Elementary School is located in Daeo Village, South Morotai District. As a school under the Ministry of Religion which is located in a Muslim-majority environment, it does not alienate the school community because the school has Muslim teachers and accepts Muslim students. Bullying education is appropriate for children from marginalized communities, children with different gender identities, these criteria are what moved us to create outreach activities about bullying so that religious harmony is maintained. The implementation method is by socializing and playing games to train cohesiveness between teams. The results of the activity provide an understanding of bullying, the impact on friends, and respect for differences. The principal and teachers were also very enthusiastic and received us very well, they hope that activities like this will not only happen once but repeatedly.Bullying adalah pola perilaku agresif, anak-anak yang paling rentan menghadapi risiko lebih tinggi diintimidasi. Sekolah Dasar Gereja Masehi Injil Halmahera (GMIH) terletak di Desa Daeo, Kecamatan Morotai Selatan. Sebagai sekolah dibawah Kementrian Agama yang berada pada lingkungan mayoritas muslim tidak membuat para warga sekolah terasingkan sebab sekolah tersebut memiliki guru-guru beragama Islam dan menerima siswa beragama Islam. Edukasi bullying tepat dilakukan pada anak-anak dari masyarakat yang terpinggirkan, anak-anak dengan identitas gender yang berbeda, kriteria inilah yang membuat kami untuk tergerak membuat kegiatan sosialisasi tentang bullying agar kerukunan hidup beragama tetap terjaga. Metode pelaksanaanya adalah dengan sosialisasi dan bermain game untuk melatih kekompakkan antar tim. Hasil kegiatan memberikan pemahaman tentang bullying atau perundungan, dampak bagi teman, dan menghargai perbedaan. Kepala sekolah dan guru-guru juga sangat antusias dan menerima kami dengan sangat baik, mereka berharap kegiatan seperti ini tidak hanya sekali tetapi berulang
PENGUATAN LITERASI AKADEMIK MELALUI PELATIHAN KARYA TULIS ILMIAH UNTUK MEMBANGUN GENERASI CENDIKIA DI MAN INSAN CENDIKIA BANGKA TENGAH
Get PDFThe training on scientific writing (KTI) for teachers at MAN Insan Cendikia Bangka Tengah represents a strategic step to enhance scientific literacy, given that KTI is a requirement for graduation and class advancement. This training aims to improve teachers' understanding of scientific writing through a guided tutorial method that combines theory with practical application. This method is designed to assist teachers in grasping the stages of KTI writing, from topic selection to proper citation techniques. Results following the training indicate a significant improvement in teachers' comprehension of KTI writing. Therefore, this training not only strengthens the academic literacy skills of teachers but also prepares them to guide students more effectively, thereby creating a quality educational environment that supports the development of an intellectual generation.
Pelatihan karya tulis ilmiah (KTI) untuk guru di MAN Insan Cendikia Bangka Tengah menjadi langkah strategis untuk meningkatkan literasi ilmiah, mengingat KTI adalah syarat kelulusan dan kenaikan kelas. Pelatihan ini bertujuan untuk meningkatkan pemahaman guru mengenai penulisan ilmiah melalui metode tutorial terbimbing, yang memadukan teori dengan praktik langsung. Metode ini dirancang untuk membantu guru memahami tahapan penulisan KTI, mulai dari pemilihan topik hingga teknik pengutipan yang benar. Hasil setelah dilakukan pelatihan menunjukkan adanya peningkatan pemahaman yang signifikan di kalangan guru terhadap penulisan KTI. Dengan demikian, pelatihan ini tidak hanya memperkuat kemampuan literasi akademik guru, tetapi juga mempersiapkan mereka untuk membimbing siswa secara lebih efektif, menciptakan lingkungan pendidikan yang berkualitas dan mendukung pengembangan generasi cendikia.
 
Perhitungan Volume Stockpile dan Pengoptimalan Waktu Pengolahan Stockpile 3, 5 dan 6 Terhadap Produksi Alat Gali muat dan Alat Angkut pada TB Primer Batubesi PT Timah Tbk
Get PDFPT Timah Tbk's Batubesi Primary Large Mine has experienced a significant decline in production in recent years, causing a change in the mining process to stockpile management that is still economical with a grade of 0.2%. This study aims to determine the volume and production of stockpiles 3, 5 and 6, the type of sediment and Sn content of stockpile material and the time required to spend stockpile material 3, 5 and 6 in order to get the optimal time. The method used is a quantitative method by taking cycle time data as much as 30 data and analyzing sample levels using XRF on each stockpile. The results of this study obtained the volume of stockpile 3 material is 132,648.42 m3,, stockpile 5 is 162,570.25 m3, and stockpile 6 is 33,090.19 m3. The calculated machine productivity at stockpile 3 is 42.17 tons/hour, stockpile 5 is 48.11 tons/hour and stockpile 6 is 39.53 tons/hour. The highest Sn content is found in stockpile 6 which is 0.33% with the type of skarn sediment. While the lowest Sn content is found in stockpile 3 which is 0.2% with oxide clay sediment type. In stockpile 5, the Sn content is 0.31% with the type of oxide clay sediment. The remaining volume of stockpile material in stockpiles 3, 5 and 6 can be spent with a time of 2.78 years using 1 unit of excavation equipment and 1 unit of transportation equipment. Optimization is carried out so that the remaining stockpile reserves can be spent within 1.74 years using 1 unit of excavation equipment and 2 units of transport equipment
Analisis Metode Perhitungan Kuantitas Batubara Di Stockpile ROM PT. XYZ
Get PDFPT XYZ had a method called the on book method to determine the amount of coal tonnage in the ROM stockpile.. This method used the initial stock from the survey calculation resut at the beginning of each month, the incoming coal to the stockpile used truck count method, and the outgoing coal from stockpile used weighbridge calculation. PT XYZ used the survey calculation results at the beginning of the next month rather than on book method result to determine the difference. The Coal tonnages based on survey result data on April 2 was 34.225,454 tons. Whereas, for the on-book calculation, the stock at March 2 was 38.409,083 tons, the coal in 2 March - 2 April was 71.154 tons, and the coal out of 2 March - 2 April was 67.994,52 tons, so the final stock obtained was 41.568,56 tons. The difference from those two methods comparison was 7.343,11 tons. This research discover the factors causing the differences between two methods i.e. incompatible vessel capacity on the truck counts tonnage calculation, disorganized stockpile patterns, declining ROM stockpile base conditions, spilled material, total station tools and weighbridges which had not been calibrated yet