Novel and green nanocomposites-based adsorbents from functionalized mesoporous KCC-1 and chitosan-oleic acid for adsorption of Pb(II)

Add time:08/30/2019    Source:sciencedirect.com

To capture heavy metals in aqueous solution, it is imperative to develop viable and safe heavy metals uptake techniques. Herein, we report a polymer matrix nanocomposite adsorbent with 2 and 5 %wt. nanofiller contents based on functionalized mesoporous fibrous silica KCC-1, chitosan, and oleic acid (abbreviated as TA-KCC-1/Chi-OLA NC). TA-KCC-1/Chi-OLA NC relying on physical adsorption are a potential candidate for heavy metals removal because of its facile fabrication procedure, low toxicity, biodegradability, and high affinity toward heavy metals. The adsorption of Pb(II) cations onto green TA-KCC-1/Chi-OLA adsorbent was studied in the batch system. Langmuir and pseudo-second-order models were found to be the best fit models to predict isotherms and kinetics of adsorption, respectively. The maximum adsorption capacity according to the Langmuir model was 168 mg g–1 (adsorption conditions: pH: 9.0, adsorbent dose: 20.0 mg; contact time: 100 min; initial concentration: 100 mg L–1).

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