Qualitative Analysis of Seawater Quality on Bulan Island in Batam

Abstract

In line with the increase in population and socio-economic development activities, various problems arise in marine ecosystems in coastal areas where waste is disposed of or as a result of weathering ships passing by in the waters. This can cause pollution and reduce the quality of seawater physically, chemically, and biologically, and it can damage the balance of the ecosystem. These physicochemical factors include temperature, pH, total solute (TDS), lead (Pb), iron (Fe), magnesium (Mg), sodium (Na), zinc (Zn), nickel (Ni), and copper (Cu). This study aims to help qualitatively improve seawater quality in the Bulan Island region's waters. The research method for the physical parameters of odor, color, and taste used organoleptic methods, while the chemical parameters for pH used a pH meter, TDS used a TDS meter, and contacted metals using a qualitative method. The results of the research are based on the parameters of smell, taste, and color of the Indonesian Ministry of Health standards, while the highest temperature is found in the middle of the sea, namely (31.7 oC). The highest pH parameter was found in the water at Sagulung Port (7.9) and the lowest at seawater (7.5), while the highest TDS value was found in seawater at Sagulung Port (209 ppm) and the lowest at Pulau Bulan Port. (108 ppm), from the results of the pH and TDS tests the three samples still met the standards of the Indonesian Ministry of Health. The metal quality test found that the seawater of Pulau Bulan Port, mid-ocean sea air, and sea air at Sagulung Port identified the presence of Lead (Pb) and Zink (Zn) metals.