富里酸、硫酸盐与碱度耦合影响下的给水管网铁释放及管垢铁形态

范明洲; 张卉; 王龙; 张珊; 贾培馨; 冯永嘉; 万涛; 纪怡梦; 朱净昱

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中国环境科学 ›› 2026, Vol. 46 ›› Issue (1) : 168-177.

水污染与控制

富里酸、硫酸盐与碱度耦合影响下的给水管网铁释放及管垢铁形态

范明洲¹, 张卉¹, 王龙¹, 张珊², 贾培馨¹, 冯永嘉¹, 万涛³, 纪怡梦¹, 朱净昱¹

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Iron release and iron form of pipe scale in water distribution system under the coupling influence of fulvic acid, sulfate and alkalinity

FAN Ming-zhou¹, ZHANG Hui¹, WANG Long¹, ZHANG Shan², JIA Pei-xin¹, FENG Yong-jia¹, WAN Tao³, JI Yi-meng¹, ZHU Jing-yu¹

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摘要

给水管网中的铁释放问题对水质安全构成严重威胁.通过建立静态模拟实验系统,研究了富里酸(FA)、硫酸根离子(SO₄^2-)和碱度(Alk)耦合作用对管网铁释放行为的影响,揭示了不同水质条件下管垢的微观形貌演变、物相转化和元素赋存形态变化.基于主成分分析(PCA),构建了铁释放预测模型,定量表征了各影响因素的相对重要性及其交互作用强度.结果表明,FA=4mg/L、SO₄^2- =240mg/L、Alk=100mg/L CaCO₃的条件下,钢管和铸铁管中铁释放量达到最大值,分别为4.82和3.60mg/L.SO₄^2-和FA与铁释放量呈正相关关系,而碱度与铁释放量呈负相关关系,且影响程度为: 碱度> SO₄^2->FA.

Abstract

The release of iron in drinking water distribution systems (DWDSs) poses a severe threat to water supply safety. By establishing a static simulation experimental system to systematically investigate the coupled effects of fulvic acid (FA), sulfate ions (SO₄^2-), and alkalinity (Alk) on iron release in DWDSs and the changes of pipe scale micromorphology, crystalline composition, and elemental speciation. Based on principal component analysis (PCA), a prediction model for iron release was developed, quantitatively characterizing the relative importance of various influencing factors and their interaction intensities. Results showed that under conditions of FA=4mg/L, SO₄^2-=240mg/L, and Alk =100mg/L CaCO₃, iron release reached the maximum of 4.82 and 3.60mg/L for steel and cast iron pipes, respectively. SO₄^2- and FA were positively correlated with iron release, while alkalinity showed negative correlations. The relative influences of these factors followed the order: alkalinity > SO₄^2- > FA.

导出引用

范明洲, 张卉, 王龙, 张珊, 贾培馨, 冯永嘉, 万涛, 纪怡梦, 朱净昱. 富里酸、硫酸盐与碱度耦合影响下的给水管网铁释放及管垢铁形态[J]. 中国环境科学. 2026, 46(1): 168-177

FAN Ming-zhou, ZHANG Hui, WANG Long, ZHANG Shan, JIA Pei-xin, FENG Yong-jia, WAN Tao, JI Yi-meng, ZHU Jing-yu. Iron release and iron form of pipe scale in water distribution system under the coupling influence of fulvic acid, sulfate and alkalinity[J]. China Environmental Science. 2026, 46(1): 168-177

中图分类号： X52

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