哈密地区生活饮用水氡-222水平及居民所致剂量

氡-222是一种放射性惰性气体,广泛的存在于自然界,美国近年研究结果表明,一般公众接受3.6msV/a 剂量中55％来自氡~(-222)及其子体的贡献。世界卫生组织把氡列为19种致癌物质之一,因此氡~(-222)及其子体对居民的潜在危害的研究引起了人们的广泛注意。为了解哈密地区生活饮用水氡~(-222)水平分布及居民所致剂量负担,我们对全区48个调查点100份水样用FD—125型氡氢分析仪以α-射气闪烁法进行了水中氡浓度调查。调查结果表明,哈密地区地面水、井水、自来水、泉水氡~(-222)浓度几何平均值(Bq/L)     

面对甲型H1N1流感切莫掉以轻心

5月18日,世界卫生组织总干事陈冯富珍在瑞士日内瓦万国宫举行的第62届世界卫生大会上致辞。她告诫说,甲型H1N1流感疫睛的扩散将持续下去,虽然目前大多数患者病情较轻,而且死亡人数不太多,但鉴于病毒的变异风险以及疫情发展的不确定性,国际社会不能对此掉以轻心。     

10个生活习惯让你远离癌症

“1000万!”看看这个每年世界新发癌症病人数吧。世界卫生组织认为,照此趋势,到2020年,全世界的癌症患者将比现在翻一番。但其实,癌症并不会无缘无故地降临,它是身体长达几十年发展变化的结果,因此只需对日常生活中的小事做点简单改变,就能显著降低患癌风险。     

《环境》杂志高级顾问

钟南山 内科学教授、中国工程院院士、美国胸科医师学会高级会员、爱尔兰皇家医师学会高级会员、香港医学会荣誉会员、英国爱丁堡医学院荣誉博士。现任广州呼吸疾病研究所所长、中华医学会会长、联合国世界卫生组织吸烟与健康医学顾问、中国工程院卫生与健康部副主任、广东省科协副主席、广州市科协主席。     

世卫：交通事故是全球性灾祸

世界卫生组织表示．交通事故是造成全球10-24岁年龄段人残废的主要原因，这是一个严重的、被忽视的但又是可以预防的公众健康问题。[第一段]     

Health risks associated with heavy metals in the drinking water of Swat, northern Pakistan

The concentrations of heavy metals such as Cd, Cr, Cu, Mn, Ni, Pb and Zn were investigated in drinking water sources （surface and groundwater） collected from Swat valley, Khyber Pakhtunkhwa, Pakistan. The potential health risks of heavy metals to the local population and their possible source apportionment were also studied. Heavy metal concentrations were analysed using atomic absorption spectrometer and compared with permissible limits set by Pakistan Environmental Protection Agency and World Health Organization. The concentrations of Cd, Cr, Ni and Pb were higher than their respective permissible limits, while Cu, Mn and Zn concentrations were observed within their respective limits. Health risk indicators such as chronic daily intake （CDI） and health risk index （HRI） were calculated for adults and children separately. CDIs and HRIs of heavy metals were found in the order of Cr 〉 Mn 〉 Ni 〉 Zn 〉 Cd 〉 Cu 〉 Pb and Cd 〉 Ni 〉 Mn 〉 Cr 〉 Cu 〉 Pb 〉 Zn, respectively. HRIs of selected heavy metals in the drinking water were less than 1, indicating no health risk to the local people. Multivariate and univariate statistical analyses showed that geologic and anthropogenic activities were the possible sources of water contamination with heavy metals in the study area.     

甲醛中毒症状及处理方法

甲醛会对人体健康的产生较大的负面影响,主要表现在嗅觉异常、刺激、过敏、肺功能异常、肝功能异常和免疫功能异常等方面,甲醛具有强烈的致癌和促癌作用,已经被世界卫生组织确定为致癌和致畸形物质,是公认的变态反应源,也是潜在的强致突变物之一。然而,在特殊职业及装修过程中却难以避免与甲醛的接触,这就要求大家了解并防范甲醛中毒。     

甲醛(HCHO)基本知识及对人体健康的影响

<正>甲醛(HCHO)是一种无色、强烈刺激性气味的气体,易溶于水、醇醚,目前已被世界卫生组织确定为致癌和致畸形物质,是公认的变态反应源,也是潜在的强致突变物之一。研究表明,装修和家具中含有的甲醛,其释放期长达3～15年。甲醛对     

Levels and distributions of polychlorinated biphenyls in sewage sludge of urban wastewater treatment plants

Concentrations of polychlorinated biphenyls (PCBs) have been measured in sewage sludge samples from 8 urban wastewater treatment plants in Beijing, China. The PCB congeners were analyzed by isotope dilution high resolution gas chromatography/high resolution mass spectrometry method. The concentration of PCBs ranged from 65.6 to 157 ng/g dry weight (dw), with a mean value of 101 ng/g dw. The dioxin-like PCB WHO-TEQs (World Health Organization-Toxic Equivalents) of the sludge were lower than 1 pg /g dw. Conse...