Removal of Orange-II dye from water by adsorption on enzyme immobilized and sodium alginate supported layered double hydroxides
Keywords:
Biosorption, wastewater, Amylase, peroxidasAbstract
Wastewater from various industries contains noticeable amounts of azo dyes which are unfortunately not efficiently removed using conventional wastewater treatment. The chemical Aniline, the basis for the Azo dyes (specifically group III A1 and A2) are considered to be poisonous giving off carcinogenic amines. Biosorption can be considered as an emerging green, cost-effective, and efficient alternative technology for removal of such dyes from wastewater. In the present study, peroxidase and alpha amylase enzymes were immobilized on sodium alginate incorporated Zinc-Aluminum LDH and tested for the removal of orange-II dye from water. The adsorption capacity of the prepared biosorbents was measured. The equilibrium adsorption capacity(qt) for Alpha-amylase immobilized Sodium alginate incorporated Zinc-Aluminum LDH (ZA-NA-Amy LDH) was found to be 1.78 mmol/g and that for peroxidase immobilized Sodium alginate incorporated Zinc-Aluminum LDH (ZA-NA-HRP LDH) was found to be 1.00 mmol/g. The composites were found to be more effective than just enzymes immobilized LDHs.
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