ການວິເຄາະຄຸນນະພາບນໍ້າເປື້ອນຊຸມຊົນດ້ວຍເຕັກນິກການວິເຄາະອົງປະກອບຫຼັກ: ກໍລະນີສືກສາຄອງນໍ້າເຂດນະຄອນຫຼວງວຽງຈັນ

The Analysis of Domestic Wastewater Quality Using Principal Component Analysis Technique: A Case Study of The Canal in the Vientiane Area

Authors

  • Phoutthaharn Inthilath Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author
  • Vanseng chounlamany Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author
  • Kesiny Phomkeona Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author
  • Phengxay Deevanhxay Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author
  • Southsada Zulinthone Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author
  • Santi Konhmany Center of Excellence in Environment, National University of Laos Author
  • Aphisid Chandavongs Department of Chemistry, Faculty of Natural Sciences, National University of Laos Author

Keywords:

Community Wastewater, PCA, Organic Pollutant

Abstract

This study evaluates the physical and chemical quality of domestic wastewater using Principal Component Analysis (PCA) with nine key indicators across 7 villages: DongPaSak, PhonKham, SaWang, PhonPhaNao, HongKae, Fai, and NongNieng. The indicators include temperature, pH, electrical conductivity (EC), turbidity, dissolved oxygen (DO), chemical oxygen demand (CODCr), biochemical oxygen demand (BOD), total phosphorus (T-P), and total nitrogen (T-N). Data were collected over 18 months, from October 2022 to April 2024.

The analysis reveals that Principal Component 1 (PC1) explains the highest variance (54.91%), primarily associated with CODCr, BOD, T-P, and turbidity, indicating the presence of organic pollutants. Principal Component 2 (PC2) (22.62%) and Principal Component 3 (PC3) (14.27%) describe biological processes and environmental factors related to pH, DO, BOD, T-P, and T-N. A comparative analysis of water sources indicates that DongPaSak Village exhibits the highest pollution levels in PC1, PhonKham Village has the lowest contamination in PC3, and HongKae Village faces issues with dissolved oxygen levels in PC2

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Published

2025-06-30

Issue

Vol. 3 No. 1 (January-June) (2025): Lao Journal of Science and Technology

Section

Articles

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