Abstract
This research (1) analyzed the content of Pb and Cd in water and sediment; (2) analyzed physical and chemical parameters in water; (3) determined the enrichment factor and accumulation index of Pb and Cd in sediments; and (4) to identified water quality based on the Pollution Index (IP) and STORET. The analysis was carried out using PCA (Principal Component Analysis) and Pearson's correlation, and was conducted in the downstream section of the Musi River, Palembang, using a random sampling technique. Based on the analysis, it was found that the content of Pb and Cd in the waters had surpassed the quality standard whereas the contents of both heavy metals found in the sediment still met the quality standard. It was also found that several variables of the physical and chemical parameters did not meet the criteria. Based on the Enrichment Factor (EF) and the Accumulation Index (Igeo) of Pb and Cd, the river had not been defiled. The pollution index values of both IP and STORET indicated that the water had been heavily polluted. Based on the PCA, three factors which affected the quality of the river water were found.
 Keywords: abiotic, defilement, evaluation, index, mud, quality.
Highlights
Indonesia has many rivers that are scattered in various regions and act as transportation routes and support the economy of the local community
The average level of Phosphate content was below the quality standard (0.2 mg L-1)
BOD and DO content had surpassed the quality standard, reaching 3 and 4 mg L-1. This happened to Rewalsar Lake, which experienced a decline in BOD values caused by the many spiritual visits to the lake and the disposal of waste (Kumari and Kumar, 2020) (Table 1)
Summary
Indonesia has many rivers that are scattered in various regions and act as transportation routes and support the economy of the local community. One such river is the Musi River of South Sumatera (Hartanto et al, 2019). The pollution found in the Musi River was caused by two factors: domestic and industrial activities. The domestic activity was said to affect more than the industries. This condition could be seen from the organic decomposition caused by household waste which was dominated by iron ranging from 288 to 453 mg L-1(Setianto and Fahritsani, 2019)
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