Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 369, Issue -, Pages 528-538Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2019.02.058
Keywords
Adsorption; Congo red; Rhodamine B; Hyper-cross-linked resin; Thermodynamic parameters; Kinetics
Categories
Funding
- KFUPM Project [NUS15103]
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A novel hyper cross-linked, 3,5-diacrylamidobenzoic acid based resin (APEADA) has been synthesized for the highly efficient removal of Congo red (CR) and Rhodamine B (RhB) from aqueous solution. The synthesized resin was extensively characterized by FT-IR, FESEM, PXRD, EDX, BET analysis, TGA and solid state C-13 (CP-MAS) NMR. APEADA exhibits thermal stability (approximate to 200 degrees C) and a considerable surface area (64.78 m(2) g(-1)), as suggested by Thermogravimetric Analysis (TGA) and Brtmauer-Emmett-Teller (BET) analysis, respectively. The experimental data of dyes adsorption onto resin was examined by a variety of isotherm models wherein Langmuir and Temkin models were found to be the best fit for explaining the adsorption of both RhB (R-2 = 0.9899) and CR (R-2 = 0.9919). The resin can efficiently remove CR (92.03%) at pH 8.14 and moderately adsorb RhB (45.3%) at pH 5.01 and exhibits maximum adsorption capacity (Q(max)) for CR (280.0 mg g(-1)) and RhB (23.28 mg g(-1)) at 318.6 K. The thermodynamic analysis of the data revealed that the adsorption processes were exothermic and spontaneous. Moreover, APEADA showed efficient removal efficiency (80.13%) for dyes in simulated effluents which warrants its utility and effectiveness in industrial waste water treatment.
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