流速、pH值、硫酸根和碱度耦合变化对管网铁释放的影响

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摘要当饮用水水质和水力条件发生变化时,给水管网中管垢和水相之间的固液平衡会被破坏,引起铁释放,造成饮用水的二次污染.本文通过建立动态模拟系统,重点分析了流速(v)、pH值、硫酸根(SO₄^2-)和碱度(Alk)耦合变化影响下的给水管网铁释放过程,并运用主成分回归法构建了铁释放预测模型.结果表明,在v=0.12m/s、pH=6.5、 C_SO₄^2-=250mg/L、Alk=100mg/L CaCO₃的条件下,钢管和铸铁管总铁浓度达到最大,分别为1.423mg/L和0.184mg/L;2种管道腐蚀产物中均存在大量片状和散射球状结构,主要成分均为α-FeOOH,且实验后钢管和铸铁管管垢中α-FeOOH、γ-FeOOH和Fe₂O₃含量增加,Fe₃O₄含量减少;预测模型表明,总铁浓度与pH值和Alk呈负相关关系,与SO₄^2-和v呈正相关关系,四种因素的影响程度排序为v>pH>Alk>SO₄^2-.

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	王龙
	张卉
	张珊
	苗梓怡
	刘卓
	范明洲
	贾培馨
	冯永嘉

关键词 ：给水管网, 管垢, 铁释放, 黄水

Abstract：When drinking water quality and hydraulic conditions change, the solid-liquid balance between pipe scales and water in drinking water distribution systems (DWDSs) will be destroyed, causing iron release and secondary pollution of drinking water. In this paper, dynamic experimental systems were set up to analyze the process of iron release in DWDSs under coupled changes of flow rate (v), pH, sulfate (SO₄^2-), and alkalinity (Alk). Principal component regression was used to establish the model for predicting the release of iron. The results indicated that under the condition of v=0.12m/s, pH=6.5, [SO₄^2-]=250mg/L, and Alk=100mg/L CaCO₃, the total iron concentrations in steel and cast iron pipes reached the maximum of 1.423mg/L and 0.184mg/L, respectively. A large amount of flaky and scattered spherical structures were observed in steel and cast iron pipe scales, with α-FeOOH being the main component. After the experiment, the contents of α-FeOOH, γ-FeOOH, and Fe₂O₃ in both pipe scales increased, while those of Fe₃O₄ decreased. The predictive model showed that the total iron concentrations were negatively correlated with pH and Alk, and positively correlated with SO₄^2- and v. The order of the influences of the four factors was: v > pH > Alk > SO₄^2-.

Key words： drinking water distribution system corrosion scale iron release yellow water

收稿日期: 2024-06-03

PACS:

X131.2

基金资助:陕西省自然科学基础研究计划重点项目(2021JZ-50);陕西省教育厅青年创新团队建设科研计划项目(21JP065)

通讯作者: 张卉,副教授,zhanghui@xauat.edu.cn E-mail: zhanghui@xauat.edu.cn

作者简介: 王龙(2000-),男,陕西咸阳人,西安建筑科技大学硕士研究生,主要从事城市饮用水安全输配技术研究.18919812037@163.com.

引用本文:

王龙, 张卉, 张珊, 苗梓怡, 刘卓, 范明洲, 贾培馨, 冯永嘉. 流速、pH值、硫酸根和碱度耦合变化对管网铁释放的影响[J]. 中国环境科学, 2025, 45(1): 124-131. WANG Long, ZHANG Hui, ZHANG Shan, MIAO Zi-yi, LIU Zhuo, FAN Ming-zhou, JIA Pei-xin, FENG Yon-jia. Coupling effects of flow rate, pH value, sulfate, and alkalinity on iron release from drinking water distribution systems. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 124-131.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2025/V45/I1/124

[1] 中华人民共和国住房和城乡建设部.中国城乡建设统计年鉴. 2022年 [M]. 北京:中国计划出版社, 2022. Ministry of Housing and Urban-Rural Development of the People’s Republic of China. China Urban and Rural Construction Statistical Yearbook. 2022 [M]. Beijing: China Planning Press, 2022.
[2] Zhao L, Liu D, Zhang H, et al. Study on electrochemical reduction mechanisms of iron oxides in pipe scale in drinking water distribution system [J]. Water Research, 2023,231:119597.
[3] Wang H, Hu C, Shi B. The control of red water occurrence and opportunistic pathogens risks in drinking water distribution systems: A review [J]. Journal of Environmental Sciences, 2021,110:92-98.
[4] 石宝友,鲁智礼,徐硕,等.丹江口水源对北方某市管网铁释放影响的研究 [J]. 中国给水排水, 2013,29(11):33-39. Shi B Y, Lu Z L, Xu S, et al. Study on the impact of Danjiangkou water source on iron release in a northern city pipeline network [J]. China Water & Wastewater, 2013,29(11):33-39.
[5] 王洋,张晓健,陈超,等.水源切换引起给水管网黄水问题原因分析 [J]. 环境科学, 2009,30(12):3555-3561. Wang Y, Zhang X J, Chen C, et al. Analysis of the causes of yellow water problems in water supply networks caused by water source switching [J]. China Environmental Science, 2009,30(12):3555-3561.
[6] Sarin P, Snoeyink V L, Bebee J, et al. Iron release from corroded iron pipes in drinking water distribution systems: effect of dissolved oxygen [J]. Water Research, 2004,38(5):1259-1269.
[7] Lytle D A, Tang M, Francis A T, et al.The effect of chloride, sulfate and dissolved inorganic carbon on iron release from cast iron [J]. Water Research, 2020,183:116037.
[8] Imran S A, Dietz J D, Mutoti G, et al. Red water release in drinking water distribution systems [J]. Journal, 2005,97(9):93-100.
[9] John D, Eisnor, et al. Impact of secondary disinfection on corrosion in a model water distribution system [J]. Journal of Water Supply: Research and Technology-Aqua, 2004,53(7):441-452.
[10] Sun H, Shi B, Yang F, et al. Effects of sulfate on heavy metal release from iron corrosion scales in drinking water distribution system [J]. Water Research, 2017,114:69-77.
[11] Yang F, Shi B, Bai Y, et al. Effect of sulfate on the transformation of corrosion scale composition and bacterial community in cast iron water distribution pipes [J]. Water Research, 2014,59:46-57.
[12] Hu J, Dong H, Xu Q, et al. Impacts of water quality on the corrosion of cast iron pipes for water distribution and proposed source water switch strategy [J]. Water Research, 2018,129:428-435.
[13] Mcneill L S, Edwards M. Review of Iron Pipe Corrosion in Drinking Water Distribution Systems [J]. Journal American Water Works Association, 2001,93(7):88-100.
[14] Vreeburg J H G, Boxall J B. Discolouration in potable water distribution systems: A review [J]. Water Research, 2007,41(3):519-529.
[15] 张卉,张珊,杨敏,等.硫酸根、氯离子和碱度对管网金属释放的影响 [J]. 中国环境科学, 2024,44(5):2534-2542. Zhang H, Zhang S, Yang M, et al. Effects of sulfate, chloride and alkalinity on metal release from pipe networks [J]. China Environmental Science, 2024,44(5):2534-2542.
[16] 王海燕,杨方廷,刘鲁.标准化系数与偏相关系数的比较与应用 [J]. 数量经济技术经济研究, 2006,23(9):150-155. Wang H Y, Yang F T, Liu L. Comparison and application of standardized coefficient and partial correlation coefficient [J]. China Quantitative Economics and Technical Economic Research, 2006, 23(9):150-155.
[17] Cui Y, Liu S, Smith K, et al. Characterization of corrosion scale formed on stainless steel delivery pipe for reclaimed water treatment [J]. Water Research, 2016,88:816-825.
[18] 刘菁,田一梅,刘云慧,等.pH值,硫酸根和温度对钢管管垢中铬释放的影响 [J]. 中国环境科学, 2022,42(12):5679-5686. Liu J, Tian Y M,, Liu Y F, et al. Effects of pH, sulfate and temperature on chromium release from steel pipe scales [J]. China Environmental Science, 2022,42(12):5679-5686.
[19] Li M, Liu Z, Chen Y. Physico-chemical characteristics of corrosion scales from different pipes in drinking water distribution systems [J]. Water, 2018,10(7):931.
[20] Zhuang Y, Han B, Chen R, et al. Mechanism study on organic pollutant accumulation by iron-based particles in drinking water conditions [J]. Chemical engineering journal, 2020,396:125157.
[21] Jia S, Tian Y, Li J, et al. Field study on the characteristics of scales in damaged multi-material water supply pipelines: Insights into heavy metal and biological stability [J]. Journal of Hazardous Materials, 2022,424:127324.
[22] Yang F, Shi B, Gu J, et al. Morphological and physicochemical characteristics of iron corrosion scales formed under different water source histories in a drinking water distribution system [J]. Water Research, 2012,46(16):5423-5433.
[23] 米子龙.水源切换对给水管网水质铁稳定的影响及控制特性研究 [D]. 北京:清华大学, 2015. Mi Z L. Study on the influence of water source switching on the iron stability of water quality in water supply network and its control characteristics [D]. Beijing:Tsinghua University, 2015.
[24] Peng C, Ferguson J F, Korshin G V. Effects of chloride, sulfate and natural organic matter (NOM) on the accumulation and release of trace-level inorganic contaminants from corroding iron [J]. Water Research, 2013,47(14):5257-5269.
[25] 谭浩强,何文杰,韩宏大,等.水力条件对供水管网铁释放的影响研究 [J]. 中国给水排水, 2014,30(3):56-58. Tan H Q, He W J, Han H D, et al. Study on the influence of hydraulic conditions on iron release in water supply network [J]. China Water & Wastewater, 2014,30(3):56-58.
[26] 田一梅,刘扬,赵鹏,等.海水淡化水在既有管网输配的铁释放控制研究 [J]. 环境科学, 2012,33(4):1216-1220. Tian Y M, Liu Y, Zhao P, et al. Study on the control of iron release from desalinated water in existing pipeline network [J]. Environmental Science, 2012,33(4):1216-1220.
[27] 刘莹,于影,石宝友,等.供水管网铁释放的影响因素相对重要性分析 [J]. 环境科学, 2017,38(12):5090-5096. Liu Y, Yu Y, Shi B Y, et al. Analysis of relative importance of factors affecting iron release in water supply networks [J]. Environmental Science, 2017,38(12):5090-5096.