首页|Unary and binary adsorption of anionic dye and toxic metal from wastewater using 3-aminopropyltriethoxysilane functionalized porous cellulose acetate microspheres
Unary and binary adsorption of anionic dye and toxic metal from wastewater using 3-aminopropyltriethoxysilane functionalized porous cellulose acetate microspheres
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Recent industrial development raised a great concern for human health and environmental protection due to the generation of toxic wastewater.The present study aims to prepare a new low-cost bio-based adsorbent for the effective simultaneous removal of anionic dye and toxic metal.Porous cellulose acetate(CA)microspheres were synthesized using a double emulsion(W/0/W)-solvents evaporation technique then modified using 3-aminopropyltriethoxysilane(APTES-CA).SEM,FTIR and XRD results emphasized the successful preparation of APTES-CA microspheres with average diameter size around 380-430 urn.Porosity analysis announced the mesoporous structure of the CA microspheres and the meso-microporous structure of APTES-CA microspheres.Also,EDX elemental analysis confirmed the presence of Si and N of APTES indicating the successful modification of CA surface.Further to this,the adsorption study showed that APTES modification improved the adsorption efficacy toward RBI9 and Pb~(2+).Where,in unary solution,almost complete removal of 10 mg/L Pb~(2+)was achieved using 1.00 g/L of APTES-CA after 30 min at pH0 5.On the other hand,91% of 20 mg/L RB19 preadjusted to pH0 2 can be removed by 1.00 g/L of APTES-CA after 90 min.The kinetic study indicated that APTES-CA adsorbs RB19 and Pb~(2+)via different mechanisms,specifically,chemisorption for RBI9 and physisorption for Pb~(2+).The theoretical Langmuir monolayer saturation capacity(180 mg/g)manifested a good efficiency of APTES-CA towards Pb~(2+).In the binary solution,Pb~(2+)does not affect RB19 adsorption while RB19 retards Pb~(2+)adsorption.
Double emulsion-solvents evaporationtechniqueAPTESSimultaneous adsorptionReactive blue 19Lead ionsWastewater treatment
Pre-Treatment and Finishing of CeRulosic Fabric Department,Institute of Textile Research and Technology,National Research Center,33 El-Buhoth St,Dokki Cairo,12622,Egypt
Department of Water Pollution Research,National Research Centre,33 El Bohouth St,Dokki,Giza,12622,Egypt
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