This research aims to investigate the removal of HA from
environmental water through coagulation method using PAC with
CaCO3 as the neutralizer and coagulant aid. Studies were carried
out to assess the ability of PAC to remove HSs from contaminated
water and surface (river) water. The comparative efficiencies of PAC
and other coagulant reagents were also conducted. The sludge
volume (SV) using CaCO3 with different neutralizers was also
investigated. Sample water collected from Sebangau River located
in Central Kalimantan, Indonesia was used in this study.