Bronzović Maja, Marović Gordana
Institute for Medical Research and Occupational Health, Zagreb, Croatia.
Arh Hig Rada Toksikol. 2006 Jun;57(2):165-70.
Today, bottled and tap drinking water mainly originates from underground waters which might contain considerable amounts of naturally occurring radionuclides. One of the most toxic radionuclide in drinking water is 226Ra. Following the metabolism of calcium, it could be deposited into the bone where, in sufficient amount, it could cause bone sarcoma. Although current drinking water preparation techniques are not specifically designed for 226Ra removal they can reduce certain amounts of 226Ra. This paper presents the efficacy of standard water preparation processes (granular activated carbon, green sand and fixed-leaf filtrations) currently used by Zagreb water supply and two Croatian water bottlers in removing 226Ra. Compared with other studies, the results of our study show low to moderate efficacy in lowering the 226Ra concentration in drinking water. Even so, 226Ra concentrations still comply with the recommendation of the Word Health Organisation (WHO) and with Croatian legislation.
如今，瓶装饮用水和自来水主要源自地下水，而地下水中可能含有大量天然存在的放射性核素。饮用水中毒性最强的放射性核素之一是镭-226。随着钙的新陈代谢，它可能会沉积在骨骼中，若含量足够，可能会引发骨肉瘤。尽管目前的饮用水制备技术并非专门设计用于去除镭-226，但它们可以减少一定量的镭-226。本文介绍了萨格勒布供水公司和两家克罗地亚瓶装水生产商目前使用的标准水制备工艺（颗粒活性炭、绿砂和固定叶片过滤）在去除镭-226方面的效果。与其他研究相比，我们的研究结果表明，在降低饮用水中镭-226浓度方面，其效果为低到中等。即便如此，镭-226的浓度仍符合世界卫生组织（WHO）的建议以及克罗地亚的法律规定。
