Open AccessRestoration of soil contaminated by mine acid using Thiobacillus sp. and Clostridium sp. effective bacteria
Author(s) -
Michael Christian Ozcar,
Bambang Iswanto,
Astri Rinanti
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1098/5/052035
Subject(s) - thiobacillus , bioremediation , contamination , acid mine drainage , pollutant , environmental chemistry , bacteria , environmental science , soil contamination , pollution , chemistry , environmental pollution , environmental engineering , mining engineering , biology , geology , environmental protection , ecology , genetics , organic chemistry
The mining industry in Indonesia in recent years has grown rapidly, causes an emerging problem of environmental mine acid pollution on the land around the mining site. The most dangerous effect of mine acid is the high accumulation of metals in land re-vegetation. The method for recovering land contaminated by mine acid that used in this study is bioremediation using effective bacteria Thiobacillus sp. and Clostridium sp. The core of this research is to find optimum environmental conditions (contact time, pollutant concentration, and bacterial concentration) to degrade mine acid, which is that effective bacteria contacted with soil contaminated by mine acid under optimum environmental conditions with variations of time. The results showed that the optimum environmental conditions for effective bacteria to degrade mine acid were 48 hours contact time, 60% pollutant concentration and 40% bacterial concentration. The results of this study is the effective bacteria efficiently recover soil contaminated by mine acid within 48 hours as evidenced by an increase in pH from 2 to 6, a decrease in Fe content from 3.6 mg/L to 0.27 mg/L, and decreased Mn levels from 3.2 mg/L, to 0.31 mg/L.