Removal of methylene blue dye using nano zerovalent iron, nanoclay and iron impregnated nanoclay – a comparative study
Mekonnen Maschal Tarekegn, Raj Mohan Balakrishnan, Andualem Mekonnen Hiruy, Ahmed Hussen Dekebo
Abstract
) of 0.999, 0.997 and 0.983, respectively. The optimal pH 7.0 (RE: 99.1 ± 0.73%), initial MB concentration 40 ppm (RE: 99.9 ± 0.03%), contact time 120 min (RE: 99.9 ± 0.9%), and adsorbent dose 80 (99.9 ± 0.03%) were obtained for iron impregnated nanoclay. The optimal operational parameters of nanoclay and nZVI, respectively, were pH 11.0 and 13.0, initial MB concentration 20 and 20 ppm, adsorbent dose 100 and 140 mg, and contact time 120 and 140 min. In general, iron impregnated nanoclay has shown promising cationic dye adsorbance for industrial applications; but a recyclability test is suggested before scale-up.
Topics & Concepts
Zerovalent ironMethylene blueAdsorptionSorptionEndothermic processSorbentLangmuir adsorption modelVolume (thermodynamics)Nuclear chemistrySpecific surface areaZeta potentialMaterials scienceChemistryChemical engineeringBET theoryNanoparticleNanotechnologyPhotocatalysisOrganic chemistryCatalysisEngineeringPhysicsQuantum mechanicsEnvironmental remediation with nanomaterialsAdsorption and biosorption for pollutant removalNanomaterials for catalytic reactions