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All Journal Majalah Forum Teknik UGM Jurnal Purifikasi
Agus Budhie Wijatna
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Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science

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Pengaruh Pengoperasian Reaktor Kartini terhadapKadar DO, BOD, dan COD Air Pendingin primer Agus Budhie Wijatna
Forum Teknik Vol 28, No 2 (2004)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

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Abstract

 Affiliation—Country—Bio Statement Principal contact for editorial correspondence. NameTri Wulan Tjiptono Affiliation—Country—Bio StatementPusat Penelitian dan  Pengembangan  Teknologi  Maju  -  BATAN, Yogyakarta NameTony Dwi Susanto Affiliation—Country—Bio StatementFakultas Teknik Industri,  UPN Veteran, YogyakartaTitle and AbstractTitle  AbstractIn  light  water  reaclor  (LWR) systems,  water coolant passes through  reactor  core  to  remove heat  generated  by fission processes.  Therefore,  the  temperature  of water  coolant raise  and thewater  coolant  is  irradialed  by neutrons from reactor core.The research was  directed  to  explorethe influences  of  both of them  to  the  contents of Dissolved  Oxygen  (DO), Biological OrygenDentand  (BOD)  and  Chemical  Oxygen Demand  (COD).The  research  wss done by  chemical titration method  to  measure  the  content  of DO,  BOD5,and COD in the  water  coolant  in  which  the reactor  was  operated  at   critical  condition  andconstant  power.  water  samplingwere   done  after  45',90',  l3s',  IB0',225',  and  270',   reactoroperation.The results  of  this  research  are:  (1)  the  temperature  of the  coolant  is  increasing  asoperating  time function, (2) the content  of DO is  also  increasing,  while  BOD5 and  COD tends  tobe constant,  and  (3)in  general  the reactor  water coolant  is  safe  to  be released  to the environment.Keywords:  water coolant,  heat,  irradiation, chemical titration, DO
Studi Variabilitas Isotop Airhujan Sebagai Fungsi Elevasi untuk Mendapatkan Merapi Meteoric Water Line MMWL Agus Budhie Wijatna; S Sudarmadji; S Sunarno; Heru Hendrayana
Forum Teknik Vol 35, No 1 (2013)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

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Abstract

Theoretically environmental isotopic compositions ofprecipitation decrease with increasing altitude. Linear regression analysis was applied to environmental isotopic compositions (δ18O, δ2H) data on 15 precipitation samples collected along an altitudinal 126 to 1260 m.asl from November 2011 to February 2012 to determine the local meteoric water line for southern slope of mount Merapi. Merapi meteoric water line (MMWL) is an equation that describes the relationship between isotopic compositions of precipitation with altitude. This study was completed as part of a larger research of the groundwater dynamics studies using natural isotopes for southern slope of mount Merapi.Isotopic compositions of precipitation samples were measured using Liquid-Water Stable Isotope Analyzer LGR DLT-100 at the Center for the Application of Isotopes & Radiation Technology Laboratory, National Nuclear Energy Agency (BATAN), Jakarta. Regression results for the precipitation samples for southern slope of mount Merapi yielded a MMWL defined by the equation δ2H=8.332 δ18O+15.068(r2 =0,998); the change of isotopic compositions in precipitation with altitude of about -1.2%d100m for deuterium and -0. 1 %dl 00m for oxygen-18.This equation will be useful as reference for hydrological dynamics studies on the southern slope of mount Merapi that use isotopes of 2H and 18O to trace sources of ground-water recharge, to evaluate mixing of sea-water and groundwater, to analyze groundwater-mineral exchange, and to analyze many other groundwater contamination problems.Keywords: precipitation, isotope ratio, isotopic composition, m.asl, MML .
Aplikasi Isotop Alam untuk Mengetahui Asal-Usul Air Umbul Cokro, Kecamatan Tulung, Kabupaten Klaten Harry Leo Kharisma; Agus Budhie Wijatna; Wahyu Wilopo
Forum Teknik Vol 36, No 1 (2015)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

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Abstract

Determination of the goundwater origin of Umbul (spring) Cokro, at Klaten has been done by using environmental isotope tracers, i.e. carbon-13, deuterium, and oxygen-18. Groundwater samples were taken from springs and wells in surround of it, i.e. Wajong Wetan, Kemiri, Karang Podang, Sodong, and Karang Kendal. In the mean time, determination of groundwater genesis has been conducted by analyzing the composition of deuterium (2H) and oxygen-18 (18O) using mass spectrometer. While the direction of groundwater which has the same genesis is determined by analyzing of carbon-13 composition and will be verified by hydraulic gradient.If the composition of sample from suround is almost equal with sample from spring, hence groundwater from well flows to spring.The result of this research showed that δ13C composition of each sample is -12,92 + 4,20 until 5,56 + 4,31 o/oo PDB, that means that the sample include in Groundwater DissolvedInorganic Carbon; while analysis of deuterium and oxygen-18 indicated that composition of groundwater molecule in Sodong, Karang Podang, and Karang Kendal are almost equal to the spring, with δD composition = -52,00 + 0,77 o/oo and δ18O composition = -9,16 + 0,28 o/oo to Standard Mean Ocean Water (SMOW). Based on those results, groundwater of Umbul Cokro originally from Sodong, Karang Podang, and Karang Kendal.Keywords: groundwater, recharge area, Umbul Cokro, environmental isotope tracer.
ANALISIS INTERKONEKSI HIDRAULIKA MATA AIR DENGAN SUMUR BOR DENGAN MENGACU MERAPI METEORIC WATER LINE (MMWL) Agus Budhie Wijatna
Purifikasi Vol 13 No 1 (2012): 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.v13.i1.222

Abstract

The springs of Umbul Lanang (MA-1) and Umbul Wadon (MA-2) are clean water resources for the community of Yogyakarta Special Region. Operating of 5 new boreholes (SB 1-5) which is located at the same location on the southern slopes of Mount Merapi feared would reduce both of springs discharge. The objectives of this research was to determine a Merapi Meteoric Water Line (MMWL) which would be used as a reference to analyze how the hydraulic interconnection between SB and MA. This study was completed as part of a larger research of the dynamics groundwater studies using natural isotopes on the southern slope of Mount Merapi. The results showed that the isotopic composition of groundwater in the SB-1, SB-2, SB-3, SB-4 similar to the MA-1 and MA-2, and the origin of groundwater are come from the recharge zone which located at the elevation 1136 to 1260 m.asl. While the isotopic composition of SB-5 different with MA-1 and MA-2. It can be concluded that the operation of SB-1, SB-2, SB-3, SB-4 will decrease the discharge of MA-1 and MA-2, while SB-5 has no effect.
Co-Authors Harry Leo Kharisma Heru Hendrayana S Sunarno Sudarmadji Wahyu Wilopo