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Ecological Risk Assessment of Heavy Metals in Sediment of the Louhajang River, Bangladesh

Publication Date - 2019-09-19 00:00:00

Publication Title : Ecological Risk Assessment of Heavy Metals in Sediment of the Louhajang River, Bangladesh

Publicationed By : Dr. Md Saiful Islam

Publication Publication Date : 2019-09-19 00:00:00

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Publication Description :

Heavy metal pollution in sediment of the riverine ecosystem is regarded as a major problem in  developing countries like Bangladesh. The present study was conducted to assess the contamination  level of heavy metals and their ecological in sediments of the Louhajang River, Bangladesh. Certain  indices, including the enrichment factor (EF), pollution load index (PLI), geoaccumulation index  (Igeo), and contamination factor (Ci  f) were used to assess the ecological risk. The mean concentration  of Cr, Ni, Cu, As, Cd, and Pb in sediments was 9.205, 7.676, 17.727, 8.999, 0.083, and 4.597 mg/  kg, respectively. Metals in sediment during winter were higher than summer season. Enrichment  factor (EF), contamination factor (Ci  f), geoaccumulation index (Igeo), and pollution load index (PLI)  revealed lower contamination of sediments by the studied heavy metals. The sum of toxic units at  different sampling sites was less than 4, indicating a low toxicity of heavy metals in sediments of  the study river. Considering the severity of potential ecological risk for single metal, the descending  order of pollutants was As > Cu > Cd > Ni > Pb > Cr. In view of the potential ecological risk,  sediments of Louhajang River showed low potential ecological risk.

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