首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 AWWA WQTC62459
到馆提醒
收藏跟踪
购买正版
Comparison of Water Treatments Used to Reduce the Corrosivity of Soft Waters: A Pilot Study 用于降低软水腐蚀性的水处理方法的比较:一项初步研究
发布日期: 2005-11-01
软水往往会缩短饮用水分配系统和供水系统管道的使用寿命 诱发腐蚀可能会恶化用户水龙头处的水质。法国新立法 (2001年12月20日第2001-1220号法令)自2003年底起生效,建议不提供供水 要有侵略性。通常使用两种类型的处理方法来限制软土的腐蚀效应 低碱度水:添加磷酸盐缓蚀剂;中和作用 或软水的再矿化。为网络运营商的选择提供指导 适当的治疗方法,必须根据技术(可靠性和有效性)进行比较 从经济角度来看(处理成本和对管道更新的影响)。在这项研究中,一名飞行员 已经进行了实验,以比较磷酸盐抑制剂与再矿化的影响 关于饮用水分配系统中常用管道的退化(铸铁、水泥) 以及家用管道系统(铜)。研究了水处理对植物生长的影响 水(pH值、金属浸出等)和腐蚀测量(电化学探针、重量 损失优惠券)。15个月的结果表明,最佳水质为 通过再矿化方法实现。这种水处理策略减少了金属管道 软水腐蚀降低40%,铜和铁释放减少50%。 包括17个参考文献、表格、图表。
Soft waters tend to reduce the life time of pipes from drinking water distribution systems and the induced corrosion is likely to deteriorate water quality at the consumer's tap. New French legislation (decree 2001-1220 of 20/12/2001) effective since the end of 2003, recommends the supplied water not to be aggressive. Two types of treatments are commonly used to limit the corrosion effect of soft waters with low alkalinity: the addition of phosphate corrosion inhibitors; and, the neutralization or remineralization of soft water. In order to provide guidelines for the network operator to choose suitable treatment methods, a comparison must be made based on a technical (reliability and efficacy) and an economical standpoint (treatment cost and impact on pipes renewing). Within this study, a pilot experiment has been performed to compare the impact of phosphate inhibitors with remineralization on the degradation of pipes commonly used in drinking water distribution systems (cast iron, cement and steel) and household plumbing systems (copper). The impact of water treatments was studied on the water (pH, metal leaching, etc) and on corrosion measurements (electrochemical probes, weight loss coupons). The results obtained over a 15-month period showed that the best water quality was achieved with the remineralization approach. This water treatment strategy reduces metal pipe corrosion of soft water by 40% and improves both the copper and the iron release reduction by 50%. Includes 17 references, tables, figures.
分类信息
发布单位或类别: 美国-美国给水工程协会
关联关系
研制信息
相似标准/计划/法规