Author/Authors :
Chakraborty, Tapos Kumar Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Chandra Ghosh, Gopal Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Akter, Mst. Nowshin Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Audhikary, Keya Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Islam, Md. Shahnul Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Ghosh, Prianka Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Zaman, Samina Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Habib, Ahsan Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh , Enamul Kabir, A. H. M Department of Environmental Science and Technology - Jashore University of Science and Technology - P.O. Box 7408, Jashore, Bangladesh
Abstract :
This study analyzed the potential use of Mahagoni wood charcoal (MWC) and Mahagoni bark
charcoal (MBC) as biosorbent for reactive red 120 (RR 120) dye removal from aqueous solutions. The
effect of different operating parameters such as contact time (1–210 min), pH (3–11), adsorbent dose
(1–20 g/L), and initial RR 120 concentration (5–70 mg/L) on adsorption processes was studied under
batch adsorption experiments. The maximum removal of RR 120 by MWC (78%) and MBC (88%)
was achieved when the optimum conditions were initial RR 120 concentration (5 mg/L), pH (3),
adsorbents dose (10 g/L) and equilibrium contact time (150 min). The RR 120 adsorption data of
MWC and MBC were better described by the Langmuir and Freundlich isotherm models, respectively.
The MWC and MBC showed maximum adsorption capacities of 3.806 and 5.402 mg/g, respectively.
Kinetic adsorption data of all adsorbents (MWC and MBC) followed the pseudo-second-order model
and this adsorption process was controlled by chemisorption with multi-step diffusion. A lower
desorption rate advocated that both strong and weak binding forces could exist between RR 120
molecules and adsorbents. The study results revealed that the utilization of either MWC and or MBC
as an adsorbent for treating RR 120 is effective and environmentally friendly.
Keywords :
Adsorption efficiency , adsorbent , anionic dye , biomass
