Remediation of mine acid water using mangrove sediment

Abstract

The handling of acid mine drainage has so far been carried out chemically and physically so it is inefficient because it can cause new pollutants. Therefore, biologically, AAT countermeasures can use bioremediation techniques by utilizing sulfate-reducing bacteria (BPS) which are abundant naturally in sediments. This study aims to analyze the ability of sediments of mangroves in neutralists acid mine water, for analyze the optimum pH resulting from the sediments of mangroves in the neutralization of acid mine water, for analyze how reduced levels of sulfates, heavy metals mangan and iron produced, for analyze the type of mangrove sediments of the most good in the neutralization of acid mine drainage. Acid mine water samples were taken at PT. Walanae Sand, Lamuru Bone, mangrove sediments taken in the mangrove tourism area of Tongke-Tongke Sinjai. This type of research is an analysis using descriptive methods in the form of field data collection, sampling in the field and testing in the laboratory. The results showed that mangrove sediments are able to increase pH and reduce sulfate levels, can increase the pH value from 2.24 to 7.02, the optimum pH can be achieved by using sand mangrove sediments that are 7.02 on day 10. Reducing sulfate levels from 1,171 ppm to 0.625 ppm with using sand mangrove sediments on the 10th day, but can not reduce the content of manganese (Mn) and iron (Fe) by using sand or mud mangrove sediments because the metal content in these sediments is higher than acid mine water. The best mangrove sediments in the neutralization of acid mine drainage are sand sediments because the time needed is faster in neutralizing the pH and reducing sulfate levels.