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Hasil Pencarian

Ditemukan 9 dokumen yang sesuai dengan query
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Rita Yuniatun
"ABSTRAK
Konsentrasi Mn yang tinggi yaitu 3,1 kali lebih besar dari nilai rujukannya telah diidentifikasi pada air bersih yang merupakan sumber air minum di Desa Ketenger. Desa ini merupakan desa terdekat dengan sumber air panas atau air geothermal yang disebut dengan Pancuran Tujuh. Untuk mengestimasi risiko kesehatan akibat pajanan oral Mn, dilakukan analisis risiko kesehatan lingkungan pada penduduk Desa Ketenger, Kecamatan Baturraden, Kabupaten Banyumas. Konsentrasi Mn pada 12 sampel air minum dianalisis menggunakan Spektrofotometer HACH 2010 dan 12 sampel makanan terpilih dianalisis menggunakan Flame Atomic Absorption Spectrophotometer (FAAS) Shimadzu AA-6300. Sementara itu, sebanyak 136 responden yang dibagi menjadi dua kelompok umur yaitu anak dan dewasa diobservasi untuk dilakukan estimasi mengenai tingkat risiko kesehatan akibat pajanan oral Mn. Hasil uji laboratorium menunjukkan bahwa konsentrasi Mn pada sampel beras, sayur, buah, ikan dan air minum masing-masing sebesar 0,52 mg/kg, 1,53 mg/kg, 0,65 mg/kg, 0,10 mg/kg dan 0,35 mg/L. Nilai CDI Mn pada kelompok dewasa dan anak masing-masing 0,01 mg/kg/hari dan 0,02 mg/kg/hari. Sedangkan nilai RQ pada semua kelompok umur adalah <1, yang artinya konsumsi air minum dan makanan terpilih masih aman dari risiko kesehatan Mn khususnya risiko non-karsinogenik. Namun demikian, analisis lebih lanjut menemukan bahwa asupan harian Mn pada kelompok anak dan dewasa baik pria maupun wanita

ABSTRACT
Elevated level of Manganese (Mn) concentration in drinking water source which was 3,1 folds higher than its recommendation has been detected in Ketenger Village, the nearest village with hot springs (geothermal water) called “Pancuran Tujuh”. To estimate health risk from oral exposure to Mn, an environmental health risk assessment has been conducted in Ketenger Village, Banyumas, Indonesia. Mn concentration was analyzed from 12 drinking water samples by Spectrophotometer HACH 2010 and 12 local food samples by Flame Atomic Absorption Spectrophotometer (FAAS) Shimadzu AA-6300. Meanwhile, 136 respondents which were divided into two age groups, namely children and adults were observed to estimate their risks from exposure to Mn. The test results showed that Mn concentration in rice, vegetables, fruits, fish and drinking water were 0,52 mg/kg, 1,53 mg/kg, 0,65 mg/kg, 0,10 mg/kg and 0,35 mg/L, respectively. Chronic daily intake (CDI) value of Mn in adults and children were 0,01 mg/kg/day and 0,02 mg/kg/day, respectively. Meanwhile, risk quotient (RQ) value in all age groups were <1, meaning that Mn was of less non-carcinogenic risk concern. However, further analysis found that daily intake of Mn in all age groups, both men and women were categorized as deficiency which is "
2016
S64004
UI - Skripsi Membership  Universitas Indonesia Library
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"Measurement of beta radioactive contaminant in the air of medium activity laboratory. Radiometallurgy Installation is used for post Irradition examination (PIE) of nuclear fuel. The examination of spent fuel radio - chemically is done at medium activity laboratory.In this examination, the radioactive contaminant may be distributed in the air of working area. To measure the radioactivity contaminant in the air caused by PIE activity. air sampling time must be determined and sample counting must be decayed in order to eliminate the natural radiactivity. The measurement result shows that the optimum air sampling time is 20-30 minutes and no decay time of air sample (directly)"
URANIA 14 (1-4) 2008 (1)
Artikel Jurnal  Universitas Indonesia Library
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Nur Fitriah Afianti
"ABSTRACT
High anthropogenic activity in Jakarta Bay is believed to contribute a fairly high contamination as evidenced by microbial contaminants such as Coliform and Escherichia coli. The high density of Coliform and E. coli indicators of domestic contamination in Jakarta Bay as a result of an increase in the resident number who bring the flow of water to the springhead of the Jakarta Bay. It can be said that the polluted waters of Jakarta Bay and marine biota should be cultivated in this area as green shell should not consumed, because it can infect and cause gastrointestial disease. For that purpose, a research of microbial pollutants was conducted in Jakarta Bay in July 2015, and the results showed a very high density, expecially in the West."
Jakarta: Pusat Penelitian Oseanografi - LIPI, 2017
575 OSEANA XLII:3 (2017)
Artikel Jurnal  Universitas Indonesia Library
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"A study at several geothermal systems in West Java,Indonesia shows that thermal waters could naturally contain up to 2.6 ppm As and 6.5 ppb Hg,and the survace hydrothermal alteration could contribute up to 50 ppm As and 800 ppb Hg...."
ITJOSCI
Artikel Jurnal  Universitas Indonesia Library
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Saragih, Viktor
"Pemodelan fisik penjalaran pencemar menggunakan seepage tank yang sudah dilakukan oleh Herlambang (2012) dan Triandhika (2013) sudah bisa memvisualisasikan adveksi dari penjalaran pencemar namun belum bisa memvisualisasikan fenomena adveksi dan dispersi yang mengalami refaksi. Tujuan penelitian ini adalah untuk mengembangkan protokol alat seepage tank untuk mampu memvisualisasikan penjalaran pencemar pada perched aquifer. Media berpori yang digunakan adalah pasir dengan dua jenis yang berbeda nilai konduktivitas hidroliknya. Pasir dialiri air hingga jenuh dan dibiarkan dalam kondisi pengaliran steady lalu pencemar dialirkan ke lapisan pasir dan dilihat visualisasi penjalarannya. Hasil dari penelitian ini berupa protokol yang merupakan pengembangan protokol sebelumnya. Pengembangan dari protokol sebelumnya adalah (1) penetapan kondisi batas kedap air pada bagian tepi kiri dan kanan kolom pasir di dalam seepage tank, (2) pengaturan debit inflow menjadi sekecil mungkin sehingga permukaan pasir tidak tergerus, (3) penggunaan jarum infus sebagai pengganti injektor, dan (4) pengaturan debit aliran pencemar sebesar 0,005 mL/detik.

Previously, Herlambang (2012) dan Triandhika (2013) were able to visualize contaminant advection with physical modeling using seepage tank However contaminant transport through heterogeneous systems, according to Freeze and Cherry (1979), they refract as passes from one medium to another with different values of hydraulic conductivity. The purpose of this study was to develop a protocol for the seepage tank and to visualize contaminant transport flow through perched aquifer. Porous media in seepage tank consist of sand with two different types of hydraulic conductivity values. Sand was saturated and the flow was in steady conditions, thencontaminantwas discharged into sand layers. Visualization of contaminnant advection and dispersion is recorded and analized. Result of this research is a protocol that is an improvement from the previous protocol; (1) setting impermeable condition on left and right of sandbox inside seepage tank, (2) controlling pump inflow as low as possible to prevent scouring on top of sandbox, (3) replacing injector into infuse needle, and (4) setting contaminant loading 0,005 mL/s.
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Depok: Fakultas Teknik Universitas Indonesia, 2015
S60128
UI - Skripsi Membership  Universitas Indonesia Library
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Riasa Roshaliha
"Kualitas udara di dalam ruangan berpengaruh besar terhadap kesehatan dan kesejahteraan manusia, dimana salah satu parameter dari kualitas udara di dalam ruangan adalah kontaminan bioaerosol. Penilaian kualitas bioaerosol dalam ruangan di berbagai wilayah di seluruh dunia diperlukan dari sudut pandang kesehatan masyarakat, terutama untuk perlindungan kelompok rentan seperti anak-anak. Skripsi ini bertujuan untuk mendapatkan gambaran kontaminan bioaerosol dalam ruang kelas sekolah dasar menurut literatur yang dipublikasikan antara tahun 2016 sampai dengan 2020. Penelitian ini merupakan tinjauan literatur sistematis mengenai gambaran bioaerosol pada ruang kelas sekolah dasar. Gambaran bioaerosol tersebut berupa jenis kontaminan bioaerosol, hasil atau konsentrasi kontaminan bioaerosol dan faktor yang memengaruhi konsentrasi kontaminan bioaerosol menurut literatur yang dipublikasikan antara tahun 2016 sampai dengan 2020 pada database Google Scholar dan Portal Garuda (Garba Rujukan Digital).
Hasil penelitian ini dibagi berdasarkan negara dengan iklim subtropis dan tropis. Semua penelitian menggunakan indirect reading instrument. Didapatkan bahwa rata rata total kontaminan pada negara subtropis yaitu bakteri dengan 1.709,91 CFU / m3, jamur dengan 519,55 CFU / m3, virus dengan 1.900 M gene copies / m3 air. Untuk negara tropis, rata – rata total kontaminan pada negara tropis untuk bakteri adalah 1.613,27 CFU / m3, dan jamur adalah 273,33 CFU / m3 dengan faktor yang memengaruhi paling tinggi yaitu suhu, kelembaban, kepadatan dan aktivitas siswa di kelas, sistem MVAC dan sumber polutan.

Indoor air quality greatly influences human health and well-being, where one of the parameters of indoor air quality is bioaerosol contaminants. Indoor air quality assessment especially on bioaerosol contaminants in various regions around the world is needed from the point of view of public health, especially for the protection of vulnerable groups such as children. This study aims to get the profile of bioaerosol contaminants in elementary school classrooms according to the literature published between 2016 and 2020. This research is a systematic literature review of bioaerosol in elementary school classrooms. The description of bioaerosol is about the of types of bioaerosol contaminants, the concentration of bioaerosol contaminants and factors that influence bioaerosol contaminants in elementary school classrooms according to the literatures that are published between 2016 and 2020 in the Google Scholar database and Portal Garuda (Garba Rujukan Digital).
The results of this study are divided by country with a subtropical and tropical climate. All studies used indirect reading instruments. It was found that the average total contaminants in subtropical countries for bacteria is 1,709.91 CFU / m3, fungi is 519.55 CFU / m3, and virus is 1,900 M gene copies / m3 air. For tropical countries, the average total contaminant in tropical countries for bacteria is 1,613.27 CFU / m3, and fungi is 273.33 CFU / m3 with the highest influencing factors are temperature, humidity, classroom occupants and their activity, system MVAC and pollutant sources.
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Depok: Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
S-pdf
UI - Skripsi Membership  Universitas Indonesia Library
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Ade Hermawan
"Banyaknya jumlah badan air di Depok menimbulkan masalah sendiri yaitu terjadinya pencemaran pada badan air itu sendiri akibat aktifitas manusia. Skripsi ini membahas tentang simulasi persebaran pencemar nitrogen pada badan air, dalam hal ini adalah Danau Agathis dan Danau Ulin di Kampus Universitas Indonesia. Salah satu aplikasi yang dapat mensimulasikan persebaran pencemar adalah paket program RMA. Paket program RMA dapat mensimulasikan kecepatan permukaan danau dan perseberan konsentrasi pencemar pada permukaan danau. Dari program RMA pula dapat dicari parameter yang sensitif terhadap nilai kecepatan dan konsentrasi.
Dalam skripsi ini juga dilakukan simulasi untuk berbagai skenario untuk diketahui respons dari badan air itu sendiri. Hasil sensitifitas menunjukkan bahwa paramater untuk komponen hidrolika tidaklah sensitif, namun untuk parameter komponen pencemar memiliki sensitifitas yang berbeda pada danau yang berbeda. Hasil dari running skenario juga menunjukkan bahwa hasil dari RMA sesuai dengan teoritis.

AbstractThe large number of water bodies in Depok creates its own problems, namely the occurrence of pollution on the water body itself due to human activities. This thesis discusses the simulation of the spread of nitrogen pollutants in water bodies, in this case is Lake Agathis and Ulin Lake at University of Indonesia Campus. One application that can simulate the spread of pollutants is the RMA program package. The RMA program package can simulate the surface velocity of the lake and the percentage of pollutant concentration on the lake surface. From the RMA program can also look for parameters that are sensitive to the value of speed and concentration.
In this thesis is also done simulation for various scenarios to know the response from body of water itself. The sensitivity results show that the parameters for the hydraulic component are not sensitive, but for the pollutant component parameters have different sensitivity on different lakes. The results of the scenario running also show that the results of the RMA fit the theoretical.
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Depok: Fakultas Teknik Universitas Indonesia, 2017
S68794
UI - Skripsi Membership  Universitas Indonesia Library
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Sethi, Rajandrea
"This textbook employs a technical and quantitative approach to explain subsurface hydrology and hydrogeology, and to offer a comprehensive overview of groundwater-related topics such as flow in porous media, aquifer characterization, contaminant description and transport, risk assessment, and groundwater remediation. It describes the characterization of subsurface flow of pristine and polluted water and provides readers with easily applicable tools for the design of water supply systems, drinking-water source protection, and remediation interventions. Specific applications range from groundwater exploitation as a drinking water supply to the remediation of contaminated aquifers, from the definition and safeguarding of drinking-water sources to the assessment of human health risks in connection with groundwater contamination events.
The book represents an ideal learning resource for upper-undergraduate and graduate students of civil engineering, environmental engineering, and geology, as well as practitioners in the fields of water resource management and environmental protection who are interested in groundwater engineering and technical hydrogeology."
Switzerland: Springer Cham, 2019
e20511000
eBooks  Universitas Indonesia Library
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Ma`ruffi Kurnia
"Aliran air tanah mengalir disebabkan oleh perbedaan tinggi hidraulik. Dalam menurunkan persamaan, massa jenis sering diasumsikan konstan. Persamaan ini dapat dan sering diaplikasi di tempat yang jauh dari wilayah pantai. Namun, persamaan tersebut tidak dapat diaplikasikan di wilayah/akuifer pantai karena massa jenis merupakan sebuah fungsi dari konsentrasi. Air laut yang mengandung garam NaCl menginduksi air tanah sehingga menyebabkan perubahan massa jenis. Peristiwa ini disebut transpor pencemar. Perbedaan massa jenis menyebabkan perubahan tinggi hidraulik. Dalam kondisi aliran tidak berubah menurut waktu (steady), transpor pencemar tidak terlalu berpengaruh terhadap perubahan tinggi hidraulik. Sebaliknya, dalam kondisi aliran yang berubah menurut waktu (unsteady), transpor pencemar sangat berpengaruh. Hal ini menyebabkan terjadi aliran air tanah didorong oleh perbedaan massa jenis (driven density). Untuk memodelkan masalah ini, digunakan metode numerik beda hingga dan diterapkan pada spread sheet program Microsoft Excel.

Groundwater flow caused by hydraulic head. In term of governing equation, density often assumed as a constant value. This equation often used far away from coastal area. However, those equation can?t be used in coastal area/aquifers because density is a function of concentration. Saltwater which is containing salt (NaCl) induces freshwater so that causing changes in the density of water. This phenomenon called contaminant transport. The changing of density caused changes in the hydraulic head. At steady condition, contaminant transport does not significantly affect to the hydraulic head. Otherwise, contaminant transport significantly affect to the hydraulic head. This is caused driven density groundwater flow. To solving this problem, is used numerical method (finite difference method) and applied to the spread sheet of Microsoft Excel."
Depok: Fakultas Teknik Universitas Indonesia, 2012
S42952
UI - Skripsi Open  Universitas Indonesia Library