| Abstrak/Abstract |
The Lantung area is one of the places on Sumbawa Island with a large gold
deposit. One of the activities of the Lantung people that has the potential
to damage the environment is separating gold from mercury. This study
aimed to examine the activity of the gold leaching process and the level of
contamination of groundwater and river water due to gold processing from
amalgamation by mercury (Hg+) waste. In this study, sampling was carried
out for each location, namely two samples of wastewater, six samples of
river water, and two samples of groundwater, which were then tested in
the laboratory on the parameters of mercury and TSS. At the same time,
pH was measured in the field. Furthermore, from the survey results, it was
found that the use of mercury was ±150-250 mL at each gold processing
location. The results showed that all samples from wastewater (tailings),
groundwater and river water were contaminated with mercury with levels
exceeding the acceptable quality standards. Furthermore, the status of
water quality using the Pollution Index (IP) method shows that wastewater
is light to moderately polluted, groundwater is lightly polluted, and river
water is also lightly to moderately polluted. |
