Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/108585
Title: Faecal contamination and its relationship with some environmental variables of four urban rivers in inner Hanoi city, Vietnam
Authors: Le, Nhu Da
Nguyen, Thi Mai Huong
Hoang, Thi Thu Ha
Duong, Thi Thuy
Phung, Thi Xuan Binh
Pham, Thi Mai Huong
Pham, Thi Minh Hanh
Le, Thi Phuong Quynh
Keywords: Total coliforms
Faecal coliforms
Hanoi city
Water quality
Point sources
Wastewater
Issue Date: 2024
Series/Report no.: Vietnam journal of Earth sciences;Vol.46, No.01 .- P.34-47
Abstract: Coliform bacteria are essential variables for assessing riverine water quality. In this study, the faecal indicator bacteria (FIB) in relationship with some physico-chemical variables were investigated during the period 2020-2022 for four urban rivers (To Lich, Lu, Set, and Kim Nguu) in the inner Hanoi city to provide the updated water quality of these rivers. The results demonstrated severe faecal coliforms contamination in riverine waters compared to the permissible values of the Vietnam technical regulation for surface water quality, QCVN08-MT:2015/BTNMT column B1. Nutrients (ammonium and phosphate) concentrations and dissolved oxygen (DO) values exceeded the permissible values, whereas pH was within the standard. The Pearson analysis demonstrated the significant positive correlation between total coliforms (TC) and Escherichia coli (EC) densities and ammonium concentration in the riverine water. Besides, these variables were higher in the dry season than the rainy one for all sites observed. All these reflect the critical role of the point sources, notably domestic wastewater inputs in the four river basins. Considering these rivers' deteriorating condition, developing an effective wastewater treatment system is necessary for the rivers in Hanoi.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/108585
ISSN: 0866-7187
Appears in Collections:Vietnam journal of Earth sciences

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