摘要
针对北方某市水源切换对典型地区实际给水管网铁稳定性的影响开展试验研究。选取2个小区用户各1家,对其管网出水水质进行连续10个月的跟踪监测。结果表明,在本次水源切换过程中,管网水的SO42-有较大幅度变化,平均从25 mg/L增加到75 mg/L,之后又降至45 mg/L;造成管网出水的浊度和总铁有所增加,部分监测值超出饮用水标准,最高达到6 NTU和1.2 mg/L。不同小区管道铁稳定性存在明显差异,管网水中铁含量和浊度具有一定的线性关系。分析水源切换前后不同时期管网出水水质的变化,得出SO42-与管垢铁释放有较好的相关性。
This study investigated the influence of water source switch on iron stability in drinking water distribution system in a northern city of China. Water quality in two houses in two residence districts had been monitored for 10 months. Experiments showed that water quality indistribution system was unstable in physical and chemical characteristics in this water source switch.Sulphate concentration increased from 25 mg/L to 75 mg/L, and then decreased to 45 mg/L. This change increased the turbidity and total iron in effluent from distribution network, and some indexes were beyond the drinking water quality standards, reaching 6 NTU and 1. 2 mg/L at maximum. The difference of iron stability in different pipes was obvious diversity, and the liner correlation between iron concentration and turbidity was found. The difference of water quality in different periods after water source switch was analyzed, and it could be concluded from the analysis results that sulphate concentration had a correlation with iron release phenomenon.
出处
《给水排水》
CSCD
北大核心
2012年第3期151-155,共5页
Water & Wastewater Engineering
基金
国家水体污染控制与治理科技重大专项(2009ZX07424-003)
国家高技术研究发展计划(863计划)项目(2009AA06Z308)
国际科技交流与合作专项(2010DFA91830)
关键词
水源切换
给水管网
铁稳定性
铁释放
Water source switch
Drinking water distribution system
Iron stability
Iron release
