Abstract
Synthetic dyes are common water contaminants that impair water quality and cause diseases such as dermatitis, cancer and dysfunction of kidneys. There is therefore a need for adsorbent materials to remove dyes from water. Here a bentonite/zeolite-NaP composite was synthesized by alkaline treatment of bentonite at 150 °C for 4 h. The composite exhibits nearly cubic zeolite-NaP crystals dispersed throughout bentonite aggregates. This composite has 512 m2/g surface area, 387 meq/100 g cation exchange capacity and 5.4 nm average pore diameter. The composite shows high removal efficiency for methylene blue, of 94%, and Congo red, of 93%, after 720 min at an initial concentration of 5 mg/l.
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Shaban, M., Abukhadra, M.R., Shahien, M.G. et al. Novel bentonite/zeolite-NaP composite efficiently removes methylene blue and Congo red dyes. Environ Chem Lett 16, 275–280 (2018). https://doi.org/10.1007/s10311-017-0658-7
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DOI: https://doi.org/10.1007/s10311-017-0658-7