An industrial ecology approach: green cellulose-based bio-adsorbent from sugar industry residue for treating textile industry wastewater effluent

摘要

Naturally abundant lignocellulosic material recovered from sugarcane industry has revealed a potential adsorbent for a textile dye uptake. In this work, bagasse is soaked with alkali then treated with sulphuric acid to produce cellulose fibres. X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) were used to characterise such adsorbent. SEM pictures explained that the chemically treated bagasse adsorbent has a micro-fibrous structure that increases the adsorption capacity. The experimental adsorption results and the characterisation data explore the prepared adsorbents from pure sugarcane bagasse (BG), chemically treated (BGT) or chemically and thermally treated (BGT500) are successfully used to remove Procion Blue (PB) dye from aqueous media. The highest dye removal was corresponding to 98.5% when BGT adsorbent was applied. Freundlich isotherm and pseudo-second order models are well described Procion Blue adsorption onto bagasse. The thermodynamic data, i.e. Delta G degrees, Delta H degrees and Delta S degrees illustrated the spontaneous and exothermic nature of the physical adsorption process. This investigation suggested that bagasse residue could be proposed as a low-cost adsorbent with a high adsorption capacity value for textile dye effluent removal.