POLLUTION LEVELS AND RISK ASSESSMENT OF HEAVY METALS IN SEDIMENT AT TENGI RIVER, SELANGOR

Authors

  • Za Akimi Mohd Zainuddin School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan Malaysia
  • Nadasofa Mohd Saidi Lembaga Urus Air Selangor, Tingkat 13, Bangunan Darul Ehsan, No 3, Jalan Indah, Seksyen 14, 40000 Shah Alam, Selangor
  • Ahmad Taufek Abdul Rahman School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan Malaysia
  • Nik Azlin Nik Ariffin School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor Darul Ehsan Malaysia
  • Sabarina Md Yunus Faculty of Applied Sciences, Universiti Teknologi MARA(UiTM), Cawangan Pahang, Kampus Jengka, 26400, Jengka, Pahang, Malaysia

Keywords:

: Energy Dispersive X-ray Fluorescence Spectrometer (EDXRF), heavy metals, radionuclide, sediment, Tengi River

Abstract

The pollution levels and impact of heavy metal (HM) contamination distribution caused by human activities on mangroves, rivers, estuaries, and coastal wetlands have recently gained attention. Waste discharged from agricultural runoff may increase pollution due to rapid population growth and socioeconomic development in Tanjung Karang, Selangor, areas such as boat manufacturing factories, residential areas, and port development, as well as waste discharged from agriculture runoff. As a result, anthropogenic radioactive materials could accumulate in sediments and infiltrate the food chain, affecting the natural system and directly endangering human health. This study determined the concentrations of heavy metals (Fe, As, Pb, Cu, and Cd) and radionuclides (Th-232, U-238, and K-40) in Tengi River sediment from 15 locations were collected using a PVC tube and Energy Dispersive X-ray Fluorescence Spectrometer (EDXRF). As a result, Cu (68.00-127.64 mg/kg), Pb (86.84-147.62 mg/kg), Fe (9.11-14.24 mg/kg), As (78.24-97.74 mg/kg), and Cd (0.11-10.02 mg/kg) while the average concentrations of radionuclides are Th>K>U with 91.96 mg/kg, 42.77 mg/kg, and 13.34 mg/kg, respectively. The data obtained were used to estimate pollution levels (Igeo, EF, CF, and PLI) using Sediment Quality Assessment (SQA) and to evaluate the potential impact of human activities on the ecosystem by calculating the Ecological Risk Index of Heavy Metals. The results show that the concentration of heavy metals and radionuclides in surface sediment may be caused by human activities near the study area. Igeo, CF, PLI, and ER indicated a heavy metal load with As and Cd in surface sediments, while Cu and Pb had a minimal degree. To conclude, Cu < Pb < Cd < As from ecological risk, As and Cd are most polluted in the surface sediment along the down streams of the river.

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Published

2024-10-31

Issue

Vol. 12 No. 2 (2024): October 2024

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Archives

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