Amido black treatment by precipitation with aluminum chloride and adsorption with activated carbon or soil

Abstract

The objective of the present study is to assay the hybrid process between the chemical
process (the precipitation with aluminium chloride) and the physical process (the adsorption with
activated carbon or soil) for amido black treatment. There were 4 treatments: (T1) Precipitation
withaluminium chloride followed by adsorption with activated carbon, (T2) Precipitation with
aluminium chloride followed by adsorption with soil, (T3) Adsorption with activated carbon
followed by precipitation with aluminium chloride, and (T4) Adsorption with soil followed by
precipitation with aluminium chloride. Amido black was utilized as the representative of azo dye in
this study. Results concluded that T3 (adsorption with activated carbon followed by precipitation
with aluminium chloride) demonstrated the best performance for 0.1 mM amido black treatment in
terms of color intensity reduction from score 0 (the highest deep blue color intensity) to score 10
(the lowest color intensity as clear color) and COD reduction for 99.26??0.16%. T1 showed the
decrease of color intensity from score 0 to score 10 with COD reduction for 94.56??0.75%. T2 and
T4 can also reduced the color intensity from score 0 to score 10 with light brown color from soil
filtrate and decrease the COD for 37.30??9.05% and 14.40??9.66%, respectively.

Keywords: Amido Black Azo dye, Coagulation, Adsorption, Activated carbon, Aluminium chloride, Soil