Humic Substances In Water Behind Taleghan Dam, Iran In 2022

Authors

  • Maryam Heydari Department of Environmental Health Engineering, School of Public Health and safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  • Mohamadreza Massoudinejad Department of Environmental Health Engineering, School of Public Health
  • Mohammad Rafiee Department of Environmental Health Engineering, School of Public Health and safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  • Mostafa Mohammadpoor Amini Department of Inorganic Chemistry and Catalysis, Shahid Beheshti University, Tehran
  • Zahra Shahidi-Moghadam Department of Environmental Health Engineering, School of Public Health and safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Keywords:

Dam reservoir, Fulvic acid, Humic acid, Humin, NOM, Taleghan Dam.

Abstract

Natural organic matter (NOM) is ubiquitous in water sources, particularly in dam reservoirs. Fulvic acids, humic acids, and humins can act as precursors to trihalomethanes (THMs) and haloacetic acids (HAAs) generated during water disinfection. This study aimed to quantify humic substances in the water behind Taleghan Dam, a vital water source for Tehran, which has experienced declining levels due to climate change. In the summer and autumn of 2022, samples were taken at three stations. Elevated concentrations of humic acid and fulvic acid were observed in summer, peaking at 0.191 mg.L-1 and 1.372 mg.L-1, respectively, while the highest concentration of humin (1.382 mg.L-1) was observed in autumn. Total humic substances (THS) peaked in summer (August) before the entry point into the lake, likely due to decreased rainfall and increased bioactivity. Fluctuations in dissolved organic carbon (DOC) concentrations were noted across months and stations, ranging from 5.6 to 190 mg.L-1. The highest DOC concentrations were observed at stations 1 and 2 in October. Specific ultraviolet absorbance (SUVA) values below 2 L.mg-1.m-1 indicated the potential for HAA formation. All samples throughout the study exhibited THMFP concentrations surpassing drinking water standards. These findings suggest the potential for disinfection byproduct formation in the water. The study linked variations in humic substances to prevalent soil types, urban expansion, and land use changes along riverbanks. The findings highlight the importance of monitoring water quality to manage the formation and control of THMs in Taleghan Dam.

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How to Cite

Heydari, Maryam, Mohamadreza Massoudinejad, Mohammad Rafiee, Mostafa Mohammadpoor Amini, and Zahra Shahidi-Moghadam. 2025. “Humic Substances In Water Behind Taleghan Dam, Iran In 2022”. Metallurgical and Materials Engineering, May, 88-96. https://metall-mater-eng.com/index.php/home/article/view/1559.

Issue

Vol. 31 No. 5 (2025)

Section

Research

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Copyright (c) 2025 Maryam Heydari, Mohamadreza Massoudinejad, Mohammad Rafiee, Mostafa Mohammadpoor Amini, Zahra Shahidi-Moghadam

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