Home Journals Articles Updates About
CN
image
收藏切换
Coupling effects of flow rate, pH value, sulfate, and alkalinity on iron release from drinking water distribution systems
收藏切换
PDF
Long WANG, Hui ZHANG*, Shan ZHANG, Zi-yi MIAO, Zhuo LIU, Ming-zhou FAN, Pei-xin JIA, Yon-jia FENG
China Environmental Science | 2025, 45(1) : 124 - 131
Less
收藏切换
China Environmental Science | 2025, 45(1): 124-131
• Water Pollution Control •
Coupling effects of flow rate, pH value, sulfate, and alkalinity on iron release from drinking water distribution systems
Full
Long WANG, Hui ZHANG*, Shan ZHANG, Zi-yi MIAO, Zhuo LIU, Ming-zhou FAN, Pei-xin JIA, Yon-jia FENG
Affiliations
  • School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Shanxi Xi'an 710055, China
Published: 2025-01-20
Outline
收藏切换

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 (SO42-), 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, [SO42-]=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 SO42- and v. The order of the influences of the four factors was: v > pH > Alk > SO42-.

drinking water distribution system  /  corrosion scale  /  iron release  /  yellow water
Long WANG, Hui ZHANG, Shan ZHANG, Zi-yi MIAO, Zhuo LIU, Ming-zhou FAN, Pei-xin JIA, Yon-jia FENG. Coupling effects of flow rate, pH value, sulfate, and alkalinity on iron release from drinking water distribution systems[J]. China Environmental Science, 2025 , 45 (1) : 124 -131 .
Appendix
Less
Year 2025 volume 45 Issue 1
PDF
22
9
Cite this Article
BibTeX
Article Info
  • Receive Date：2024-06-03
  • Online Date：2026-03-18
  • Published：2025-01-20
Article Data
Affiliations
History
  • Received：2024-06-03
Funding
Affiliations
    School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Shanxi Xi'an 710055, China
References
Share
https://castjournals.cast.org.cn/joweb/zghjkx/EN/
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House