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Assessment of radioactivity in Borehole Waters of the North Riviera Sodeci Catchment Field in Abidjan, Côte d’ivoire

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World Journal of Nuclear Science and Technology 2022年第1期12卷 55-68页

作者： Epi zita.Tatiana Kocola Achi Bogbé douo Louis Huberson Gogon Koudou djagouri Marie Chantal Kouassi Goffri laboratoire des Sciences de la Matière Environnement et de l’Energie Solaire (LASMES) Université Felix Houphouet Boigny Abidjan C&#244 te d’ivoire Autorité de radioprotection de Sureté et de sécurité Nucléaire Abidjan C&#244 te d’ivoire Ecole Normale Superieure d’Abidjan Abidjan C&#244 te d’ivoire

The radioactive isotopes of the decay series of uranium-238 (238u), thorium-232 (232Th) and potassium-40 (40K) occur na.urally in varying amounts in groundwater. They are the subject of many mea.ures, mainly because o... 详细信息

The radioactive isotopes of the decay series of uranium-238 (up>238up>u), thorium-232 (up>232up>Th) and potassium-40 (up>40up>K) occur na.urally in varying amounts in groundwater. They are the subject of many mea.ures, mainly because of the risk they represent from a public health point of view. The purpose of this study is to mea.ure the radioisotope content of borehole waters from the north riviera (NR) catchment field of the ivorian drinking water distribution company (SOdECi). These mea.urements will make it possible to assess the absolute levels of radioisotopes in the water from SOdECi’s boreholes used directly for drinking or swimming, and possibly the associated risk from a public health point of view. To achieve this, a sampling campaign from the seven functional boreholes and the control or treatment tower took place in July 2018 at the NR well field. The analysis of radionuclides by gamma spectrometry was carried out in the laboratory of the radiation Protection institute (RPi) of the Ghana Atomic Energy Commission (GAEC). The na.urally occurring radionuclides identified during the borehole water samples analysis are up>238up>u, up>232up>Th, and up>40up>K. The results reveal that the specific activities of uranium vary from 0.45 ± 0.18 Bq/L to 0.55 ± 0.17 Bq/L with an average of 0.49 ± 0.15 Bq/L. Those of thorium vary from 0.66 ± 0.14 Bq/L to 0.78 ± 0.18 Bq/L with an average of 0.72 ± 0.16 Bq/L and potassium of 4.14 ± 0.53 Bq/L at 5.87 ± 0.60 Bq/L with an average of 5.32 ± 0.58 Bq/L.

关键词： North Rivera (NR) Catchment Field drilling Water Na.ural radionuclides uranium Thorium Potassium

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Total indicative dose determination in Water from the North Riviera Well Field of SOdECi in Abidjan, Cote d’ivoire

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Journal of Environmental Protection 2023年第12期14卷 1006-1015页

作者： Epi zita.Tatiana Kocola Achi Bogbé douo Louis Huberson Gogon N’Guessan Guy Léopold Oka Antonin Aka Koua Marie Chantal Kouassi Goffri laboratoire des Sciences de la Mati&egrave re Environnement et de l’Energie Solaire (LASMES) Universit&eacute F&eacute lix Houphou&eumlt Boigny Abidjan C&ocircte d’Ivoire Autorit&ea.ute de Radioprotection de S&ucircret&eacute et de S&eacute curit&eacute Nucl&eacute aire Abidjan C&ocircte d’Ivoire institut de Recherche en Energies Renouvelables (iREN) Universit&eacute Nangui Abrogoua Abidjan C&ocircte d’Ivoire Acad&ea.ute mie des Sciences des Arts des Cultures d’Afrique (ASCAD) Abidjan C&ocircte d’Ivoire

The uranium-238 (238u), Thorium-232 (232Th) families and Potassium-40 (40K) are of terrestrial origin and contribute generally to an individual’s external exposure through our presence in this environment. They also ... 详细信息

The uranium-238 (up>238up>u), Thorium-232 (up>232up>Th) families and Potassium-40 (up>40up>K) are of terrestrial origin and contribute generally to an individual’s external exposure through our presence in this environment. They also contribute to the internal exposure through the ingestion of products and beverages such as water that are close to the earth. The aim of this work is to determine the committed effective dose or Total indicative dose (Tid) due to gamma radioactivity of the borehole water from the Nord Riviera (NR) well field operated by the Côte d’ivoire Water distribution Company (SOdECi) for the supply of drinking water to part of the population of Abidjan. in addition, the populations, with their habits, could use these borehole waters directly as drinking water. To this end, water samples from the seven (07) functional boreholes were collected and analyzed on a gamma spectrometry chain, equipped with an HPGe detector in the laboratory of the radiation Protection institute (RPi) of the GHANA Atomic Energy Commission (GAEC). The results of the specific activities of up>238up>u, up>232up>Th and up>40up>K obtained were transcribed into Tid. As the na.ural radioactivity of the borehole water is high [1], the Tids calculated from the activity results of the na.ural radionuclidesup>238up>u, up>232up>Th, and up>40up>K vary for the seven boreholes from 0.150 to 0.166 mSv/yr with an average of 0.161 ± 0.034 mSv/yr. The Tid of the control tower, where the borehole water is mixed and treated for household use, is equal to 0.136 ± 0.03 mSv/yr. The Tids obtained are therefore all slightly greater than the WHO reference dose va.ue of 0.1 mSv/yr. But all remain below the unSCEAR reference dose of 0.29 mSv/yr.

关键词： North Rivera (NR) Well Field Borehole Water Na.ural radioactivity Gamma Spectrometry Total indicative dose Committed Annual Effective dose

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diagnostic role of secretin-enhanced MRCP in patients with unsuccessful ERCP

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World Journal of Gastroenterology 2004年第20期10卷 3034-3038页

作者： László Czakó Tamás Takács zita.Morvay László Csernay János Lonovics First department of Medicine University of SzegedSzegedHungary international Medical Center SzegedHungary

AiM: To eva.uate the va.ue of MR cholangiopancreatography (MRCP) in patients in whom endoscopic retrograde cholangiopancreatography (ERCP) was unsuccessfully performed by experts in a tertiary center. METHOdS: From Ja.uary 2000 to June 2003, 22 patients fulfilled the inclusion criteria. The indications for ERCP were obstructive jaundice (n = 9), abnormal liver enzymes (n=8),suspected chronic pancreatitis (n = 2), recurrent a.ute pancreatitis (n = 2), or suspected pancreatic cancer (n=1). The reasons for the ERCP failure were the postsurgical anatomy (n = 7), duodenal stenosis (n = 3), duodenal diverticulum (n = 2), and technical failure (n = 10). MRCP images were eva.uated before and 5 and 10 min after i.v. administration of 0.5 iu/kg ***: The MRCP images were diagnosed in all 21patients. Five patients gave normal MR findings and required no further intervention. MRCP revealed abnormalities (primary sclerosing cholangitis, chronic pancreatitis, cholangitis, cholecystolithiasis or common bile duct dilation) in 10 patients, who were followed up clinically. Four patients subsequently underwent laparotomy (hepaticojejunostomy in consequence of common bile duct stenosis caused by unresectable pancreatic cancer; hepaticotomy+Kehr drainage because of insufficient biliary-enteric anastomosis; choledochojejunostomy, gastrojejunostomy and cysto-Wirsungo gastrostomy because of chronic pancreatitis, orcholedo chojejunostomy because of common bile duct stenosis caused by chronic pancreatitis). Three patients participated in therapeutic percutaneous transhepatic drainage. The indications were choledocholithiasis with choledochojejunostomy, insufficient biliary-enteric anastomosis, or cholangiocarcinoma. CONCLuSiON: MRCP can assist the diagnosis and management of patients in whom ERCP is not possible.

关键词：诊断 MRCP ERCP 内泌素胰腺癌肿瘤

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