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PENANGGALAN 14C UNTUK MENENTUKAN UMUR PELAPUKAN TANAH DENGAN METODE RADIOKARBON Siregar, Darwin A.; Satrio, Satrio
Berkala Arkeologi Vol 32 No 2 (2012)
Publisher : Balai Arkeologi Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (852.126 KB) | DOI: 10.30883/jba.v32i2.52

Abstract

Penanggalan 14C untuk menentukan umur sampel karbon selama ini dilakukan dengan metode sintesis benzena (C6H6). Dengan metode ini dapat dianalisis satu sampel dalam sehari dengan biaya bahan yang relatif tinggi. Akhir-akhir ini telah dikembangkan metode baru, yaitu metode absorpsi CO2. Metode terakhir ini sering disebut direct counting CO2, karena radioisotop 14C yang terkandung didalamnya secara langsung dicacah dan dikonversi menjadi umur. Pengembangan dan penerapan metode ini dilakukan dengan tujuan mendukung berbagai penelitian hidrologi, kelautan, klimatologi, geologi dan arkeologi secara lebih cepat, ekonomis dan praktis. Hasil analisis 14C untuk sampel yang sama menggunakan metode absorpsi CO2 dibandingkan metode sintesis benzena relatif sama.
KARAKTERISTIK AIR TANAH AKUIFER DALAM SEKITAR TEMPAT PEMBUANGAN SAMPAH TERPADU (TPST) BANTAR GEBANG-BEKASI, JAWA BARAT satrio, satrio
Jurnal Teknologi Lingkungan Vol. 18 No. 1 (2017)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jtl.v18i1.48

Abstract

Telah dilakukan penelitian air tanah akuifer dalam di sekitar TPST Bantar Gebang, Bekasi menggunakan pendekatan isotop alam dan kimia air. Penelitian dilakukan dengan mengambil sejumlah sampel air tanah akuifer dalam (kedalaman lebih dari 40 m) di beberapa lokasi sumur bor sekitar TPST Bantar Gebang dan kemudian dianalisis konsentrasi isotop alam dan kimia airnya. Penelitian bertujuan untuk mengetahui karakteristik air tanah akuifer dalam di sekitar TPST Bantar Gebang terhadap kemungkinan interaksi dengan air lindi sebagai dampak aktivitas pembuangan sampah. Berdasarkan hasil analisis isotop alam 18 O dan 2H, karakteristik air tanah akuifer dalam dapat dibagi menjadi tiga kelompok sesuai perbedaan konsentrasi isotop alamnya. Pertama, air tanah B3 memiliki konsentrasi isotop alam 18O dan 2H paling miskin (depleted), diperkirakan berasal dari daerah imbuh (recharge) dengan elevasi relatif tinggi. Kedua, air tanah BG2, BG8, BG9, BG4 dan BG7 memiliki konsentrasi isotop alam 18O dan 2H paling kaya (enrich), diperkirakan berasal dari daerah imbuh dengan elevasi relatif rendah. Ketiga, air tanahBG6, BG1dan BG5 memiliki konsentrasi isotop alam 18O dan 2H berada diantara kelompok pertama dan kedua, diperkirakan daerah imbuhnya berada pada elevasi diantara keduanya.Namun demikian, baik berdasarkan hasil analisis isotop alam maupun kimia air, air tanah BG5 dan BG7 terindikasi telah mengalami proses evaporasi atau percampuran dengan air tanah dangkal atau air permukaan tetapi bukan dengan air lindi. Demikian pula dengan sampel air tanah lainnya, seluruhnya tidak mengalami interaksi dengan air lindi. Sementara itu, hasil 14C menunjukkan bahwa aliran air tanah akuifer dalam bergerak dari selatan menuju utara dan barat-laut.Kata kunci: karakteristik air tanah, akuifer dalam, isotop alam, kimia air, TPST Bantar Gebang
Major Ions for Tracing Leachate Migration within Shallow Groundwater in the Vicinity of Municipal Landfill in Bantar Gebang - Bekasi Pujiindiyati, Evarista Ristin; Satrio, Satrio; Prasetio, Rasi
Indonesian Journal of Chemistry Vol 19, No 1 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.189 KB) | DOI: 10.22146/ijc.25702

Abstract

Bantar Gebang landfill located in Bekasi regency is a biggest sanitary landfill in Indonesia which comes up some refusals from local people because of its bad impact on their environment. Major ion contents in leachate and fresh groundwater were investigated during the rainy and dry season to determine contamination by leachate released from Bantar Gebang and Sumur Batu landfill. Leachate contained high concentrations of all major ions that was mainly characterized as a NaKHCO3 water type. On the other hand, most fresh groundwater samples were predominated by CaMgHCO3 and CaMgCl water type. Concentrations of K+, Ca2+, Mg2+, Na+, SO42-, Cl-, HCO3- and NO3- in leachate were to be in a maximum factor of 2110; 7; 6; 143; 20; 112; 349 and 20, respectively than its contents in groundwater. Leachate from Bantar Gebang was detected have a higher concentration than those contained in Sumur Batu that was probably due to its mature leachate. An estimated mixture of leachate to fresh water in monitoring wells (5 m and 15 m depth) was in the range of 20 to 34%, related to Na+ and Cl- signatures, while the shallow groundwater located in residents in the vicinity of these landfills exhibited maximum leachate about 2%.
STUDI AIR TANAH DI SEKITAR TEMPAT PEMBUANGAN AKHIR SAMPAH BANTAR GEBANG BEKASI JAWA BARAT Satrio, Satrio
Purifikasi Vol 8 No 2 (2007): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v8.i2.123

Abstract

Telah dilakukan penelitian air tanah di sekitar tempat pembuangan akhir (TPA) sampah Bantar Gebang Bekasi menggunakan metode isotop alam (18O, 2H dan 3H) dan dilengkapi data hidrokimia. Penelitian ini dilakukan dengan mengambil sejumlah sampel air lindi, air permukaan dan air tanah di sekitar TPA dengan tujuan untuk melihat sejauh mana pengaruh sanitary landfill terhadap air tanah di sekitarya. Hasil analisis isotop alam menunjukkan bahwa sebagian besar air tanah dangkal telah mengalami kontaminasi oleh zat pencemar yang berasal dari TPA yang sebarannya telah mencapai kira-kira 1 km dari lokasi TPA. Hasil ini didukung dengan data hidrokimia khususnya nitrat yang memperlihatkan kecenderungan yang hampir sama. Sedangkan air tanah akuifer dalam (>40 meter) tidak memperlihatkan adanya pengaruh dari zat pencemar yang berasal dari area TPA.
DINAMIKA AIR TANAH DAN INTER RELASINYA DENGAN AIR SUNGAI DI CEKUNGAN BANDUNG Satrio, Satrio
Purifikasi Vol 9 No 1 (2008): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v9.i1.143

Abstract

At the present time, water scarcity in Bandung Basin has reached its critical point, marked with springs that stop discharging and lowering water table. The same condition can be seen on river water that heavily exposed by industrial waste along the river. Through environmental isotopes (2H, 18O and 14C) approach, the condition of deep and shallow groundwater wells alongside the river can be known. This research was conducted by taking some samples of shallow groundwater, deep groundwater and river water (Citarum, Cikapundung, Cikeruh and Citarik). The amount of water sample needed for 2H and 18O isotopes analysis was 20 ml, whereas for 14C isotope analysis, 60 liters of water sample needed to extract into BaCl­3 precipitation. Based on isotopes 2H, 18O and graphic 2H vs 18O data show that there are three of resident groundwater (shallow groundwater) which its groundwater have been mixing by river water. Whereas the result of isotope 14C, does not show inter relation, either by shallow groundwater or river water. From iso-age contour, it could be concluded that the dynamics pattern of deep groundwater show movement derived from north and south mountains to north-west direction (Cimahi and Leuwigajah). These locations are industrial area with very high groundwater exploitation.
STUDI AIR TANAH PADA AREA SEMBURAN LUMPUR LAPINDO SIDOARJO MENGGUNAKAN ISOTOP ALAM Satrio, Satrio
Purifikasi Vol 11 No 1 (2010): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v11.i1.179

Abstract

Groundwater age study has been carried out on mud eruption area in Sidoarjo using natural isotopes. The study was done in 2007 and 2009 by analyzing water samples from mud eruption area. The aim of the study was to identify water characteristics which seeped out from the mud eruption area. Origins of the water can be fossil water, groundwater, or sea water. The 18O, 2H, and d2H data, which were plotted together with d18O data of the water samples of 2007 (LUSI-1 and LUSI-2), showed that water from the center of mud eruption area had interacted with magmatic materials. Whereas, the water from LUSI-3 location which was collected about 300 m distance from the center of mud eruption area had an age of more than 40,000 years, which contained 13C, 18O, and 2H of 1.58o/oo, 5.28o/oo, and -17.5o/oo respectively. This matter indicated that the water was sea water fossil which interacted with magmatic materials. The water in LUSI-4 location had an age of 18,408 years, which contained 13C, 18O, and 2H of -10.5o/oo, 7.68o/oo, and -35.3o/oo respectively. These data indicated that the water was fresh water, which was not mixed with water from mud. The water age from LUSI-5 location was 14,237 years, and contained 13C, 18O, and 2H of -3.00o/oo, -0.25o/oo, and -21.1o/oo respectively. These data showed that the water was partially originated from the groundwater and dominated by mud water. The water age at MVKA location was 14,355 years, and contained 13C, 18O, and 2H of 2o/oo, 2.61o/oo, and -6.6o/oo respectively. This water was estimated as a mixture of mud water and intruded sea water. Plots of 18O, 2H, d2H and d18O, 14C data of water samples of 2009 showed that the water was dominated by groundwater, but the water from LUSI-11 sample was indicated as sea water.
MENINGKATKAN MINAT BELAJAR MUSIK MELALUI PERMAINAN ANSAMBEL MUSIK Satrio, Satrio; Setyani, Galuh Arti
Perspektif Ilmu Pendidikan Vol 27 No 2 (2013): Perspektif Ilmu Pendidikan
Publisher : Fakultas Ilmu Pendidikan Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.828 KB) | DOI: 10.21009/PIP.272.4

Abstract

This classroom action research have purpose to improving the interest in music learning from music ansamble on 5th grade in SDN Pulogebang Pagi, the research was conducted as from April through May 2012. The research are 30 students were studied at there. This classroom research was implemented through stages of planning, action performance, observations, and reflections as a basic of re-planning in the next cycle. Based on research’s obtained the conclusions that using the recorder soprano ansamble can increase the interest of student in music learning on 5th grade in SDN 04 Pulogebang Pagi. Implication from this research, stated that music ansamble can change performance teacher into more creative and professional, and usefull for student daily life.
POLA DINAMIKA AIR TANAH DI DAERAH BEKASI BERDASARKAN ANALISI RADIOISOTOP 14C Siregar, Darwin A; satrio, Satrio
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 1 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.684 KB)

Abstract

A study of deep groundwater dynamic pattern on the basis of radioisotope 14C analysis has been carried out in the Bekasi  area. Some samples of deep groundwater were collected for14 C analysis. The results were plotted on the locality map concerned and a contour pattern was obtained. The pattern shows that the deep groundwater age of the area south of Bekasi is younger than those of the north and northwest area. This suggests that deep groundwater in the study area flows in the north and northwest directions. Meanwhile, Bekasi area is the recharge area.  Keywords: Bekasi dynamic pattern, deep groundwater, 14C analysis 
Study of Seawater Intrusion in Deep Aquifers of Semarang Coast Using Natural Isotopes and Hydrochemicals Wijatna, Agus Budi; Kayis, Muhammad; Satrio, Satrio; Pujiindiyati, Evarista Ristin
Indonesian Journal on Geoscience Vol 6, No 1 (2019)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2194.113 KB) | DOI: 10.17014/ijog.6.1.17-28

Abstract

DOI: 10.17014/ijog.6.1.17-28Seawater intrusion in deep aquifers of Semarang Coast is important to be investigated, because Semarang is one of big cities in Indonesia. Besides its dense population, the growth of industries also increases rapidly with the increase of withdrawal of groundwater either from shallow or deep aquifers. Over-exploitation of groundwater can cause a decreasing groundwater quality due to seawater intrusion. Through this study, the salinization from seawater into the deep aquifer system can be observed. Groundwater samples were collected from deep aquifers with the depth around 40-120 m, and then the isotope contents of 18O and 2H as well as the hydrochemical were analyzed. The isotope and hydrochemical analysis results show that six of thirteen samples are of freshwater type. They are in S2, S5, S7, S8, S9, and S13 sites. While the others are supposed to be encroached by seawater. The slight encroached groundwater of S1, S6, and S10 had a fraction of seawater in the range of 0.15 to 0.26, whereas the moderate and high ones were of S3, S4, S11, and S12 which had seawater fraction between 0.25 and 0.34. Seemingly, salinization mechanism of groundwater by seawater does not depend on its distance from the shoreline and bore well depth. It is confirmed to the site of S5 and S7 located 680 m and 950 m from the shoreline, respectively, which were predominated as freshwater type. On the contrary, the groundwater of S10, S11, and S12 located at further sites about 5-6 km from shoreline is clearly indicated seawater intrusion.
Pendampingan Belajar Luring dan Pembuatan Digital Branding Bersama MI Muhammadiyah Sawangan Sukmasetya, Pristi; Satrio, Satrio; Arrojak, Muhamad Yusril; Afidah, Inayatun Najihatul; Wulandari, Catur; Nawangsari, Rosiska Syekhrum
Community Empowerment Vol 6 No 2 (2021): Forthcoming Issue
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.4311

Abstract

Pandemi Covid-19 yang masih mewabah di Indonesia membuat pemerintah memberikan kebijakan pembatasan di segala sektor kehidupan, salah satunya pembatasan pada sektor pendidikan. Hal ini tentunya membuat sekolah melaksanakan kegiatan belajar mengajar secara jarak jauh (daring) melalui smartphone. Begitu pula dengan MI Muhammadiyah Sawangan yang terletak di Kecamatan Sawangan, Kabupaten Magelang. Namun pada praktiknya kegiatan pembelajaran jarak jauh ini mengalami beberapa kendala, diantaranya tidak semua daerah dapat mengakses internet dengan baik, tidak semua siswa memiliki smartphone, dan tidak semua orang tua dapat mendampingi siswa belajar di rumah, selain itu ada juga orang tua siswa yang belum terbiasa mendampingi anaknya belajar karena beberapa orang tua memiliki kesibukan lain. Pengabdian masyarakat ini bertujuan untuk memberikan pendampingan belajar secara luring (luar jaringan) di masa pandemi Covid-19 pada siswa MI Muhammadiyah Sawangan. Pengabdian masyarakat ini dilaksanakan dengan memberikan metode belajar luring yang menyenangkan menggunakan media video dengan ditambah ice breaking di akhir pembelajaran. Kegiatan ini dilaksanakan di aula Masjid At-Taqwa Dusun Ngentak, Sawangan. selain itu, pengabdian ini juga memanfaatkan media internet untuk sarana pengenalan profil MI Muhammadiyah Sawangan kepada khalayak umum. Adapun hasil yang diharapkan dari kegiatan pendampingan belajar luring ini yaitu antusiasme belajar siswa tetap terjaga.