Assessment of the Concentration of Mercury Metal in Sediment and Water Column, Taluduyunu River, Gorontalo Province, Indonesia

Mercury pollution can have a negative impact on the environment and the health of local communities. However, there is no scientific information related to the mercury content in the Taluduyuno River, which is the location of unlicensed mining activities. The purpose of this study is to analyze mercury levels in the sediment and water column of the Taluduyunu River. This information is critical in developing effective strategies to reduce mercury pollution. The sampling location was Taluduyunu River, Hulawa Village, Buntulia District, Pohuwato Regency. The number of stations was 12 from upstream to downstream. This research used a survey method, field measurement and laboratory analysis. The results showed that mercury content in sediment and water column was above the permitted standard with varying concentrations. The highest was at station 2 in the sediment (3.75 ppm), while in the water column (0.90 ppm). In general, the concentration pattern decreased towards the downstream stations, including the sediment and water columns. Moreover, the results also show that the mercury content in the sediment is higher than in the water column. The high mercury content in the Taluduyunu River has the potential to threaten the health of river ecosystems and humans. It is necessary to educate and socialize the dangers of mercury for ecosystems and humans by involving community leaders and law enforcement.