MIL-88B/montmorillonite modified cotton cellulose composite aerogel for synergistic removal of dyes and antibiotics by adsorption and degradation process
MIL-88B modified montmorillonite ( MIL-88B/MMT) was introduced into cotton cellulose-based aerogel matrix to prepare multifunctional cotton cellulose composite aerogel (MMCCA), which could effectively remove dyes and antibiotics from wastewater through the synergistic effect of adsorption and degradation. The adsorption performance of MMCCA towards dyes and antibiotics was systematically investigated under different pH values, ionic strength, initial dye concentrations and contact time. Furthermore, the degradation performance of MMCCA towards dyes and antibiotics in the presence of hydrogen peroxide (H2O2) was discussed. The results showed that the maximum adsorption capacities of MMCCA for methyl orange (MO), methylene blue (MEB) and tetracycline hydrochloride (TCH) were 138.03, 655.66 and 503.55 mg/g,respectively. The adsorption process of MMCCA was well described by the Langmuir isotherm model, Freundlich isotherm model and pseudo-second-order kinetic model. The addition of H2O2 significantly improved the removal rates of MO, MEB and TCH by the MMCCA from 64.97％, 69.31％ and 25.31％ to 96.23％, 98.61％ and 86.46％, respectively. Additionally, the MMCCA exhibited excellent recyclability.
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