摘要
针对水源切换后给水管网中出现的水质超标现象,开展了硫酸根浓度和碱度变化对管垢铁释放的影响研究。利用实验室管段模拟反应器,对比分析了不同硫酸根浓度和碱度对管垢铁释放的影响差异。结果表明,硫酸根浓度增加造成管网水质恶化的响应速度与硫酸根浓度呈正相关,硫酸根浓度越高则响应速度越快。在管垢铁释放的影响因素中,和碱度相比,硫酸根浓度是首要影响因素。在低浓度硫酸根对管垢铁释放无明显影响的情况下,碱度变化对管垢铁释放也基本无影响;而在高浓度硫酸根造成管垢溶解破坏发生铁释放的情况下,随着碱度的降低,铁的释放量明显增加。
Aimed at the exceeding standard after water source switch, the influence of sulphate of water quality in drinking water distribution system concentration and alkalinity change on iron release in pipe scale was investigated. The difference in the influence of different sulphate concentration and alkalinity on iron release in pipe scale was analyzed in laboratory pipe section reactors. The results show that the response rate of water quality deterioration caused by increase in sulphate concentration has a positive correlation with sulphate concentration. The higher the sulphate concentration is, the rapider the response rate is. As compared to alkalinity, sulphate concentration is the dominant factor leading to iron release. Under the condition that the low sulphate concentration has no significant effect on iron release in pipe scale, alkalinity change has also no effect on iron release. While under the condition that iron release occurs due to dissolution of pipe scale caused by high sulphate concentration, the iron release is increased with alkalinity decrease.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第1期31-34,共4页
China Water & Wastewater
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)项目(2009AA06Z308)
国际科技交流与合作专项(2010DFA91830)
关键词
硫酸根
碱度
给水管网
铁释放
sulphate
alkalinity
drinking water distribution system
iron release
