Assessment of Uranium Isotopes in drinking water in Kitwe, Chambeshi and Chingola Towns in the Coppe

来源 :第七届国际天然放射性物质研讨会 | 被引量 : 0次 | 上传用户:youare2b2
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  This paper specifically discusses the natural radioactivity in drinking water due to uranium isotopes in three towns located in the uranifferous Copperbelt region in Zambia.Uranium is naturally occurring radioactive material present in certain types of rocks and soils.Water passing through and over rock and soil formations dissolves many compound and minerals,including uranium; so vary amounts of it are present in some water resources.Higher values of uranium in drinking water and foodstuffs may lead to harmful effects like kidney damage,leukaemia and cancer in human beings.According to estimate,food contributes about 15% of ingested uranium while drinking water contributes about 85%.Drinking water samples were collected from municipal water taps in Kitwe,Chambeshi and Chingola towns over a period of five (5) months in 2009.The samples were analysed for uranium isotopes using Canberra Alpha Analyst Spectrometer at the Nuclear Energy Cooperation (NECSA) in South Africa.The average summed activity concentrations for U-234,U-235,and U-238 isotopes are expressed in milliBecquerel per litre (mBq/1).Chambeshi township water under Nkana Water and Sewage Company Limited abstracting water from Chambeshi underground mines had the highest activity concentration of 600.78 mBq/L followed by Roberts Reservoir of Mulonga Water and Sewage Company Limited abstracting water from the Kafue River in Chingola with 188.14 mBq/L.Bulangililo Water Treatment Plant abstracting water from Kafue River in Kitwe had 152.68 mBq/L while Nkana East Water Treatment Plant also abstracting water from the Kafue River in Kitwe had 139.64 mBq/L.A1 Reservoir of Mulonga Water and Sewage Company Limited abstracting water from both Kafue River and Konkola Copper Mines (KCM) underground had 77.16 mBq/L while the least was Garnetone township with 78.50 mBq/L abstracting water from Mwambashi River,a tributary of Kafue River in Kitwe.The average summed annual effective doses were 20.81μSv/y for Chambeshi,6.48μSv/y for Roberts Reservoir,5.25μSv/y for Bulangililo,4.82μSv/y for KCM Al Reservoir,3.78μSv/y for Nkana East and 2.63μSv/y for Mwambashi.Chambeshi Township had a highest summed annual effective dose of 20.81μSv/y but below the World Health Organization (WHO) recommended guidelines (2004) of Reference Dose Level is 100μSv from 1 year s consumption of drinking water but it is above the recommended screening levels for drinking water of 500 mBq/L for alpha emitters activity,therefore,qualifies for routine screening for radioactivity.
其他文献
由于历史、经济、地理等诸多原因,贵州省的公路基础薄弱,技术标准低,抗灾能力差。全省32398公里公路中,高级和次高级路面仅占总里程的10.98%,等外公路比重高达61.5%,加之养
诗人菲利克斯·丘耶夫曾在几年时间里多次拜访了失意的维亚切斯拉夫·米哈伊洛维奇·莫洛托夫(苏著名政治家,长期担任苏联人民委员会主席——相当于总理的职务,卫国战争期间
日光温室辣椒根部病害识别与防治262700山东省寿光市农业局王新文,齐春桂大棚辣椒定植后,根部常见病害主要有青枯病、根腐病和疫病三类,已成为春棚辣椒生产中的重要障碍。现将这三种病
她的手是金黄色的,正如她的头发。她长着一张非常上相的面孔,总是带着胜利的微笑。如果她没有选择做一名体育运动员的话,她一定会成为一名优秀的模特。在去年11月世界排球锦标赛
几乎每人都热切盼望假日的来临,假日里, 我们可以充分地休息,尽情地放松,和煦的阳光、蔚蓝的海水、清新的空气、鲜美的食物、欢愉的心情……这无疑对我们的健康大有裨益。
由15家新闻单位联合发起举办,北京宏运文化娱乐公司主办的“华夏之情”中国著名民歌手赈灾义演,于8月2日在首都体育馆隆重出台。这是一台体现无私奉献、同舟共济的大型晚会,
2010年4月29日,艺术北京当代艺术博览会在全国农业展览馆举办。有十七个国家和地区的60余家画廊参与了本届博览会。同时,本届博览会还与32个国家及地区的大使馆文化处和美术