Removal of Cationic or Anionic Dyes from Water Using Ion Exchange Cellulose Monoliths as Adsorbents

Abstract

This work deals with the preparation of poly(sodium p-styrenesulfonate) (PSS) and poly[(3-acryloylaminopropyl)trimethylammonium chloride] (APTAC) modified ion exchange cellulose monoliths (C-g-PSS and C-g-APTAC, respectively). The obtained ion exchange monoliths were employed for the removal of cationic or anionic dyes from aqueous solutions with particular reference to the effects of initial dye concentration, flow rate and ionic strength on adsorption. Detailed adsorption characteristics of ion exchange monoliths including operational parameters, adsorption kinetics and adsorption isotherms were investigated. Results showed exceptional affinity for adsorption of dyes due to the charge-induced adsorption. The observations from dynamic adsorption experiments indicated that the modified monoliths allowed ultra-fast adsorption of dyes at relatively high flow rates and were more favourable under low ionic strength conditions. An ultrahigh equilibrium adsorption capacity of 606.3 mg g−1 and dye removal efficiency of 72.3% for methylene blue was observed for the C-g-PSS monolith, which exhibited better adsorption performance than that of APTAC functionalized monolith for acid red 70. However, C-g-APTAC monolith was found superior in dye recoveries and regeneration, the adsorption efficiency can be maintained at 97% after 7 adsorption-desorption cycles. Combining the ultrafast adsorption kinetics with high removal capacity and good recyclability, the ion exchange monoliths have great potential for effluent treatment applications.

Removal of methylene blue dye using nano zerovalent iron, nanoclay and iron impregnated nanoclay – a comparative study

“…Various technologies involving chemical, physical, biochemical and combined treatment methods have been introduced and put in place to remove dye from textile wastewater. So far, co-precipitation, 17,18 coagulation, 19 solvent extraction, 20 otation, 21 electrochemical treatment, 22 ion exchange, 23 membrane ltration 24 and reverse osmosis 25 are among widely used dye removal technologies. Recently, Mesoporous Organo Silicate (PMOS) composites were synthesized and their photocatalytic degradation capacity for methylene blue was tested and an efficiency from 44 to 71% was achieved.…”

Phosphoric Acid Activated Carbon from Melia azedarach Waste Sawdust for Adsorptive Removal of Reactive Orange 16: Equilibrium Modelling and Thermodynamic Analysis

“…Currently, conventional technologies being adopted for the treatment of reactive dyes include photocatalytic degradation [ 7 ], enzymatic action [ 8 ], chemical coagulation/flocculation [ 9 ], ion exchange [ 10 ] and membrane separation [ 11 ], etc. At an industrial scale these conventional treatment processes have certain limitations: e.g., phase, shape, band gap, light source, structure, reactor design and catalyst recovery [ 12 ], the temperature specificity and alkaline conditions of laccase enzyme [ 13 ], residual sludge generation during chemical coagulation [ 14 ], slow pore diffusion, low accessible flow rates, high pressure drop and flow channeling in ion exchange [ 15 ], and chemical incompatibility in membrane separation [ 16 ], etc.…”

Upcycling Glass Waste into Porous Microspheres for Wastewater Treatment Applications: Efficacy of Dye Removal

“…However, in most literatures the adsorption capacity of a column decreased with increasing flow rate [ 70 , 74 , 75 ]. Only a few authors reported increased column adsorption with increasing flowrate [ 76 , 77 , 78 ]. Column adsorption is based on complex phenomena such as axial dispersion, film diffusion resistance, intraparticle diffusion resistance (both pore and surface diffusion) and adsorption equilibrium with the adsorbent [ 79 , 80 ].…”