Comparative Assessment of Water Quality in the Major Rivers of Dhaka and West Java

Shunitz Tanaka; Takeshi Saito; Suhaemi M. Syawal; Yustiawati; Masaomi Yasuda; Md. Tajuddin Sikder; Masaaki Kurasaki
A comparative study of general water quality has been extensively studied in some major rivers of West Java, Indonesia and Dhaka, Bangladesh. Water quality assessment based on physiochemical investigation along with heavy metal concentration in water and sediments is presented. The results indicate that maximum sampling sites in the rivers of Dhaka are severely impaired in comparison with the rivers of West Java. And, the pollution gap in the rivers of Dhaka is evident in respect of the season where pollution in winter is eminent in comparison with rainy seasons. All rivers were severely polluted with NOx, PO43- and Escherichia coli (E-coli). The heavy metal concentration of Al and Mn exceeded whereas, Cu, Zn and Pb were found to be below the international guidelines in most of the sampling points. And, Cd and Fe approached the threshold limit in Dhaka. With the enrichment study, every metal was found predominant in both the Ciliwung and the Cikaniki River; while rivers of Dhaka comprise little enrichment value adequately report noteworthy difference in metal sources along with elevated accumulation trends of metals into the bed sediments. The re-suspension experiment also suggests identical trends of metal swelling into the sediments. High health risks were envisaged due to the presence of toxic mercury in sediments (0.83-1.07 μg/g) of the Cikaniki River and paddy samples (0.08 μg/g ) close to the baseline value of Indonesia. Based on the results, it is evident that metal, organic and fecal pollution in the rivers of West Java and Dhaka are in somewhat dreadful condition that requires immediate remediation step.
Pollution; Wate Quality; West Jav; Dhak; Mercury Contamination
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