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TRANSFER RADIONUKLIDA Cs DARI AIR KE IKAN LELE (Clarias sp.) SEBAGAI PARAMETER KAJIAN DOSIS INTERNA PADA MANUSIA

Undergraduate Theses from JBPTITBPP / 2017-09-27 10:25:16
Oleh : Umi Habibah (NIM : 153 03 033), S1 - Department of Civil Engineering
Dibuat : 2007-09-20, dengan 7 file

Keyword : Annual of intake; equivalent dose/year; transfer factor; catfish;radiocaesium.
Subjek : Civil Engineering
Kepala Subjek : Faculty of Civil and Environmental Engineering

Abstrak:




Kontaminasi cesium-134 pada perairan tawar akibat kasus kecelakaan nuklir dapat menimbulkan dampak radiologi jangka panjang karena radiocesium dapat masuk




ke dalam rantai makanan. Cesium-134 dalam tubuh manusia dapat menjadi sumber radiasi interna apabila manusia mengkonsumsi bahan makanan yang terkontaminasi cesium-134. Absorpsi oleh ikan merupakan jalur utama perpindahan radiocesium dari air ke tubuh manusia. Perkiraan faktor transfer radionuklida dari air ke ikan merupakan proses penting dalam perkiraan dosis paparan radionuklida terhadap manusia melalui rantai makanan. Dalam penelitian




ini, ikan lele (Clarias sp.) dipelihara dalam kolam dengan medium air sebanyak 500 L yang telah dicemari cesium-134 dengan aktivitas 4,975 MBq. Sebagai kontrol, ikan lele dipelihara pula dalam kolam yang tidak dikontaminasi cesium- 134. Penyerapan cesium-134 diamati dengan cara mengukur aktivitas cesium-134 di organ dalam, daging dan tulang dalam selang waktu lima hari selama 67 hari pengamatan. Hasil pengukuran dengan spektrometer gamma menunjukkan aktivitas cesium-134 maksimum total dalam ikan adalah sebesar 6342,53 Bq. Konsentrasi cesium-134 maksimum pada bagian daging sebesar 87,95 Bq/gram.




Ikan lele mengabsorbsi cesium-134 dari air ke tubuhnya dan diakumulasikan pada bagian organ dalam, daging dan tulang dengan nilai faktor transfer secara berurutan sebesar 12,44; 10,79; 6,51. Faktor transfer ikan total dari air ke ikan lele adalah 8,62 yang dicapai pada hari ke-50. Validasi model perpindahan cesium-134 dari air ke ikan lele menghasilkan korelasi sebesar 97% antara




aktivitas cesium-134 pada ikan lele yang dihitung berdasarkan model dengan aktivitas cesium-134 pada ikan lele yang terukur pada penelitian. Dosis ekuivalen/tahun dihitung berdasarkan konsentrasi maksimum cesium-134 pada




daging ikan lele. Berdasarkan hasil kajian dengan proses pengolahan ikan lele menjadi pecel lele (salah satu masakan berbahan ikan lele yang paling banyak




dikonsumsi di Indonesia), konsentrasi cesium-134 dapat berkurang dari 87,95 Bq/gram menjadi 17,69 Bq/gram. Besarnya dosis ekuivalen/tahun yang akan diterima manusia apabila mengkonsumsi pecel lele yang berasal dari ikan lele yang hidup di air terkontaminasi cesium-134 sebesar 4,975 MBq adalah 0,0442 mSv/tahun. Dosis ekuivalen ini memiliki kontribusi sebesar 0,34% dari batas dosis ekuivalen/ tahun yang diisyaratkan oleh peraturan Badan Pengawas Tenaga Nuklir No.02/ka-Bapeten/V-99 (13mSv/tahun). Masukan tahunan cesium-134 pada manusia yang mengkonsumsi pecel lele dengan kosentrasi cesium-134




sebesar 17,69 Bq/gram adalah 0,000303. Pada penelitian ini, masukan tahunan untuk radionuklida Cs-134 pada pecel lele masih dibawah nilai yang diijinkan (3 x 106 Bq).

Deskripsi Alternatif :

Abstarct:




Contamination of caesium-134 in fresh water system caused by nuclear accident isposible to generate long term radiological effect because radiocaesium can enter into the food chain. Caesium-134 in human body can be internal radiation source if people consume food contaminated with caesium-134. The cesium-134 absorption by fish is the dominant transfer route of radiocaesium from water to human being.Prediction of radionuclide transfer factor from water to fish is an important process in predicting the exposure dose to human body through food chain. In this research,catfish (Clarias sp.) were also raised in container with water medium of 500 L which had been contaminated with caesium-134 of about 4,975 MBq. As control, catfish were raised in water without caesium-134. The uptake of caesium-134 was observed by measuring the activity of caesium-134 in abdominal organs, muscle, and boneevery five days within 67 days period of sampling. The result of measurement by gamma spectrometer showed that the maximum activity of caesium-134 in total catfish sample was about 6342.,53 Bq. The maximum concentration of caesium-134 on muscle was about 87.95 Bq/gram. Catfish uptake caesium-134 from water into its body and accumulated into abdominal organ, muscle, and bone with transfer factor of values respectively were about 12.44; 10.79; 6.51. Transfer factor of total fish




sample from water to catfish was about 8.62 which was found at 50th day period sampling. The validation of caesium-134 from water to catfish transport model




resulted 97% correlation between the activity of caesium-134 in catfish that were calculated based on the model with the activity of caesium-134 in catfish measuredon this research. Equivalent dose/year was calculated based on the maximumconcentration of caesium-134 in muscle of catfish. By preparation process of catfish to pecel lele, the concentration of caesium-134 was reduced from 87,95 Bq/gram to 17,96 Bq/gram. The value of equivalent dose/year was received by human body consumed pecel lele from catfish lived in water contaminated with caesium-134 was about 4,975 MBq which corelated to 0,0442 mSv/year. This amount of dose contributed of 0,34% the threshold annual equivalent dose from total consumption of food that was stated on Badan Pengawas Tenaga Nuklir Regulation No. 02/ka- Bapeten/V-99 (13mSv/year). The annual intake of caesium-134 on human body who consume pecel lele with 17,96 Bq/gram caesium-134 concentration was about 0,000303. In this research, the annual of intake caesium-134 on pecel lele was lower than the permitted value (3 x 106 Bq).

Copyrights : Copyright (c) 2007 by Faculty of Civil and Environmental Engineering .Information Dissemination Right @2007




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  • Pembimbing I :Indah Rachmatiah Siti Salami,Ir.,Dr.,M.Sc. ;




    Pembimbing II: Poppy Intan Tjahaya, Dr.,M.Sc.





    Scanner: Alice Diniarti; 2007-12-12., Editor: PKL-SMK

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