共查询到19条相似文献,搜索用时 69 毫秒
1.
2.
3.
城市供水水质标准的制订和实施对策 总被引:5,自引:2,他引:5
介绍了各国现行的水质标准在制(修)订过程中所经历的几个发展阶段,强调在制(修)订水质标准时一定要结合国家或地区的经济条件和资源条件,尽可能地吸收国际通行的科学理念(如多重屏障的水质安全理念)和方法(根据投入—产出原则选择净水工艺和进行全面质量控制),不宜片面追求一步到位的国际接轨或机械地照搬发达国家的水质标准。 相似文献
4.
5.
百菌清(chlorothalonil)是一种新型杀菌剂,化学名称为四氯间苯二甲腈(2,4,5,6-四氯-1,3苯二甲腈)。在自然界水循环过程中,百菌清经淋洗、渗透等方式进入水体污染水源水,影响饮用水水质,故在《水源水中百菌清卫生标准》GB11729—... 相似文献
6.
7.
水是自然之源,生命之本。但随着我国经济的快速发展,水环境的恶化问题不容忽视。目前,我国90%以上的城市水源受到不同程度的污染。因此,为了使饮用水水质得到保证,不仅需要我们大力推进保护水资源的举措,并对水厂的制水工艺不断强化和改进,建立一套水源水质的在线自动监测系统同样是非常必要的。 相似文献
8.
9.
10.
以长治市乡镇饮用水源保护与环境评估工作为例,在阐述长治市乡镇集中饮用水源地的基本特征的基础上,通过对目前长治市农村乡镇饮用水源保护现状分析找到存在问题,研究和探索了适合农村饮用水源保护的方法与对策,为山西省其他类似地区的农村饮用水水源保护积累经验。 相似文献
11.
从饮用水安全问题出发,介绍了我国生活饮用水水质标准的现状,剖析和比较了《城市供水水质标准》和《生活饮用水卫生标准》的特点,对检测项目、检测方法和指标值等方面的变革做了分析,同时与国外饮用水水质标准进行了比较,并提出了实施新水质标准存在的问题及建议。 相似文献
12.
13.
14.
我国水质标准与国外水质标准/基准的对比分析 总被引:2,自引:0,他引:2
系统分析了我国现行的两个水质标准《地表水环境质量标准》(GB 3838—2002)和《生活饮用水卫生标准》(GB 5749—2006),并与WHO的《饮用水水质准则》、美国环境保护局2001年《国家饮用水水质标准》和《美国国家推荐水质基准:2002》进行了比较,在此基础上提出了我国水质标准在实际执行和环境管理过程中存在的问题和需进一步改进、完善的地方,以及开展我国水质基准研究的重要性和紧迫性。结合我国水环境标准管理体系的现状,对我国水质标准体系的制/修订、如何有效建立完善的水环境标准管理体系提出了对策。 相似文献
15.
J. K. FAWELL BSc CBiol Dip RCPath D. G. MILLER BSc PhD CEng MIChemE 《Water and Environment Journal》1992,6(2):726-732
Public understanding of water quality is obtained primarily from the extensive media coverage of problems. This has contributed to a distrust of the water supply industry and of specific experts in this field. It is therefore important that the basis of standards for both microbiological and chemical parameters is absoulutely clear and scientifically defensible, since these are the yardsticks against which quality and safety will be judged. They are also the reference point from which political decisions on standards must be made.
It is also important that the public is given some understanding of the comparative risks involved and that a proper balance is struck between maintaining microbiological quality and achieving chemical standards, particularly for disinfection by-products. Without this, the demand for more stringent standards in a search for absolute safety will result in more costly water, while standards approach the unachievable. 相似文献
It is also important that the public is given some understanding of the comparative risks involved and that a proper balance is struck between maintaining microbiological quality and achieving chemical standards, particularly for disinfection by-products. Without this, the demand for more stringent standards in a search for absolute safety will result in more costly water, while standards approach the unachievable. 相似文献
16.
建设部于2005年2月颁布了《城市供水水质标准》,该标准对城市供水水质提出了更加严格的要求。对新标准的主要特点和供水企业面临的主要问题进行了分析,立足于企业现有的工艺条件和设备配置,对供水企业通过加强工艺管理、水质管理、管网建设与维护以及创新二次供水管理模式等途径实施新标准进行了探讨。 相似文献
17.
Small differences in water quality standards can mean huge differences in costs for water treatment; difficulties which are compounded by standards for which the derivation is unclear, such as the EC drinking water Directive. Such situations give no indication of the margin of safety for a parameter or the significance to consumers of exceedances. The WHO Guidelines are being revised and will be presented so that the precise derivation of the numbers is absolutely clear. The scientific and quasi-scientific considerations can be separated and the user given the appropriate information to adapt the guidelines to particular circumstances. In deriving standards for toxicological data the factors incorporated reflect uncertainties in the data and extrapolation from animals to man. Understanding the mechanisms of toxicity or carcinogenicity can reduce the uncertainty and improve the quality of the standard, often allowing higher figures to be used with confidence that public health will not be comprised. 相似文献
18.
19.
J. A. TETLOW DCC CChem FRSC MIFM ARTCS C. R. HAYES BSc Msc CBiol 《Water and Environment Journal》1988,2(4):411-415
A vailable national guidelines for disinfection practice, and for the examination of bacteriological quality, are reviewed, together with the legislative requirements of the EC 'Drinking Water'Directive. Problems of impracticability, vagueness, and ambiguity are identified.
Experience of the maintenance of bacteriological quality in large, lowland, surface water and ground-water supply areas is given with reference to the behaviour of disinfectant residuals, trihalomethanes, nitrite, and aesthetic parameters. The way forward in terms of the management of distribution systems and water treatment is discussed. 相似文献
Experience of the maintenance of bacteriological quality in large, lowland, surface water and ground-water supply areas is given with reference to the behaviour of disinfectant residuals, trihalomethanes, nitrite, and aesthetic parameters. The way forward in terms of the management of distribution systems and water treatment is discussed. 相似文献