RESEARCH FOR Cr(VI) AND Ni(II) TREATMENT ON COLUMNAR ADSORPTION MODELS USING MnFe2O4/BIOCHAR COMPOSITES FROM COFFEE HUSK

Abstract

In this study, the composite materials were synthesized by mixed ferromagnetic particles MnFe2O4 and
biochar from coffee husk with the ratio 1:2.5 (g:g). The obtained products were studied to find down the
best technology in columnar adsorption progress by studying the flow (2 ÷ 4 ml/min), adsorbent material
mass (1 ÷ 3 g) and the initial concentration of Cr(VI) and Ni(II). The columnar adsorption model results
shows that the adsorption capacity of Cr(VI) on the adsorption column is higher than that of Ni(II). Thus,
when simultaneously adsorbed both Cr(VI) and Ni(II) on the columnar adsorption model, there was a
competition between Cr(VI) in the form of anion and Ni2+ cation. Besides, the adsorption capacity of
Cr(VI) and Ni(II) of composite materials under columnar adsorption condition was lower than that of
static adsorption. This loss is due to the influence of the flow rate, the influence of the adsorbent column
height.