| This study reports on the feasibility of employing modified bamboo powder as adsorbent for dyesremoval in dyeing wastewater. The characteristics of raw bamboo powder and modified bamboo powderare studied by thermogravimetry analysis (TG-DTG), Scanning Electron Microscopy SEM, X-raydiffraction (XRD) and FTIR Spectrometer, resulting in significant increase in the adsorption of dyesonto modified bamboo powder. Experiments were carried out as function of pH, sample dosage, contacttime, and initial dye concentration. A greater percentage of dyes removal was observed with decrease ininitial concentration and increase of pH. The sorption isotherm well fitted to the Langmuir isothermmodels. The maximum adsorption capacities of modified bamboo powder for dyes are calculated as65.8mg/g (methylene blue),57.5mg/g (malachite green) and208mg/g (direct blue86),respectively,while raw bamboo powder is far below the result. Experiments were carried out as function of pH,sample dosage, contact time, and initial dye concentration. A greater percentage of dyes removal wasobserved with decrease in initial concentration and increase of pH. Overall, the kinetic studies showedthat the dyes adsorption process followed pseudo-second-order kinetics. Equilibrium data were bestrepresented by Langmuir isotherm among Langmuir and Freundlich adsorption isotherm. Modifiedbamboo powder has potentials for application as adsorbent for the removal of dyes from dyeing processwastewater. |
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