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投加不同碱性药剂对管网铁释放的影响

王刚亮 鲁智礼 石宝友 宛云杰 孙慧芳 顾军农 王东升

王刚亮, 鲁智礼, 石宝友, 宛云杰, 孙慧芳, 顾军农, 王东升. 投加不同碱性药剂对管网铁释放的影响[J]. 环境科学研究, 2015, 28(1): 134-140.
引用本文: 王刚亮, 鲁智礼, 石宝友, 宛云杰, 孙慧芳, 顾军农, 王东升. 投加不同碱性药剂对管网铁释放的影响[J]. 环境科学研究, 2015, 28(1): 134-140.
WANG Gangliang, LU Zhili, SHI Baoyou, WAN Yunjie, SUN Huifang, GU Junnong, WANG Dongsheng. Effects of Different Alkaline Chemical Dosing on Iron Release in Drinking Water Distribution Systems[J]. Research of Environmental Sciences, 2015, 28(1): 134-140.
Citation: WANG Gangliang, LU Zhili, SHI Baoyou, WAN Yunjie, SUN Huifang, GU Junnong, WANG Dongsheng. Effects of Different Alkaline Chemical Dosing on Iron Release in Drinking Water Distribution Systems[J]. Research of Environmental Sciences, 2015, 28(1): 134-140.

投加不同碱性药剂对管网铁释放的影响

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07404-002);国家自然科学基金项目(51178450,51378493)

Effects of Different Alkaline Chemical Dosing on Iron Release in Drinking Water Distribution Systems

  • 摘要: 针对不同水源切换可能使管网铁释放增加而引起黄水的问题,搭建了管网模拟中试系统,比较了投加3种不同碱性药剂对管网铁释放的影响. 结果表明:①投加NaHCO3调节进水碱度,当进水碱度为94~251 mg/L(以CaCO3计)时,增加进水碱度能够有效抑制管网系统的铁释放,并且出水中ρ(TFe)(TFe为总铁)达到GB 5749—2006《生活饮用水卫生标准》(<30 mg/L). ②pH为7.83~9.01时,采用投加NaOH调节进水pH对管网铁释放无明显抑制作用甚至有所促进;而投加Ca(OH)2调节进水pH虽然能够在一定程度上抑制管网铁释放,但抑制效果有限,不能保证出水中ρ(TFe)达标. ③当进水中ρ(SO42-)较低时,试验后期停止投加NaHCO3或Ca(OH)2后,管网系统铁释放能够维持在较低水平;但当进水中ρ(SO42-)较高时,停止投加NaHCO3或Ca(OH)2后,管网铁的释放又会明显升高.

     

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出版历程
  • 收稿日期:  2014-03-14
  • 修回日期:  2014-05-06
  • 刊出日期:  2015-01-25

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