Decreasing level of heavy metals Fe and Mn use the wetland method at coal open mining PT Bukit Asam South Sumatra Province

Abstract

PT. Bukit Asam, Tbk is a coal mining company that directly produces waste water. For this reason, it is necessary to treat wastewater to neutralize substances that pollute the wastewater, one of the methods used is constructed wetland. The method used is descriptive quantitative method. Where this study will produce the influence of the constructed wetland method in neutralizing waste water from the coal mining process at PT. Bukit Asam, Tbk. Based on the results of the study it can be seen that the waste treatment caused by the Constructed Wetland coal mining process can increase the Ph value from 3 samples averaging 2.6 mg / l, reducing the Fe metal content from 3 samples averaging 9.98 mg / l, and lowering the metal content of Mn from 3 samples averaging 0.75 mg / l and decreasing the level of Total Suspended Solid from 3 samples averaging 486 mg / l. The constructed wetland method that has been implemented at PT. BA has succeeded in neutralizing Fe and Mn metals and TSS according to the standard quality values that meet the standards set by the government.