Remediation and Mitigation Measures for SlowingDown the Decomposition of Black Shale at Batu Gajah, Perak

Pyrite, as well as being most important member of the disulfide group, is most
abundant sulphide mineral in the earth and has been extensively studied. Once
exposed to water and oxygen thru construction, mining and mineral processing
operation, it could lead to chemical and biochemical oxidation with production of
highly acidic, heavy metal leachates, which refer to acid rock drainage (ARD). This
problem will lead to the biggest environmental pollution including underground
watersource, land and flora and fauna. This study is to find the wayto treat the ARD
problem by using organic material without harm the environment and cost is cheap.
From the experiment, shown that the pH of the water after the reaction took part is
very acidic and contains several hazardous heavy metal that are can give bad impact
to human and environment. Calcium carbonate together with softwood and hardwood
is used to prevent the ARD happen. These findings of the project will lead to solve
the ARDproblemand introducingthe prototypeto further research.
KEYWORDS: pyrite; pollution; acid rock drainage; organic material; calcium
carbonate