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• W3207219413 endingPage "127706" @default.
• W3207219413 startingPage "127706" @default.
• W3207219413 abstract "Montmorillonite (MMT) and humus have a good adsorption effect on heavy metal ions. This study proposed a synthetic method for a novel composite of humus-like substances/MMT (HLS-MMT) by introducing humus precursors into the interlayer domain of MMT and then forming HLS through in situ catalytic polycondensation reaction. The structure and morphology of samples were characterized by XRD, FTIR, and SEM, which demonstrated the successful loading of HLS on the internal and external surfaces of MMT. The experimental results showed that the loading of HLS on MMT was very stable, and the adsorption capacity of the modified MMT for lead and zinc ions was greatly enhanced. The effects of single-factor experiments showed that the pH value was the key factor affecting the adsorption process. In addition, the adsorption process was found to be in good agreement with the Langmuir isotherm model and the pseudo-second-order kinetic model. The competitive adsorption experiment displayed that HLS-MMT had a higher affinity for Pb ions than Zn ions, and the cycling experiment presented that the adsorbent had good regeneration and cycling performance. This study shows that HLS-MMT is a novel adsorbent with a good capacity to separate and enrich Pb and Zn ions similar to ion-exchange resin. • HLS-MMT is prepared by in-situ polycondensation of humus precursors catalyzed by MMT. • HLS-MMT displays a greater adsorption capacity of Pb and Zn ions than MMT. • HLS-MMT shows excellent stability and cycle performance." @default.
• W3207219413 created "2021-10-25" @default.
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• W3207219413 date "2021-12-01" @default.
• W3207219413 modified "2023-10-17" @default.
• W3207219413 title "Adsorption of Pb(II) and Zn(II) ions on humus-like substances modified montmorillonite" @default.
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• W3207219413 doi "https://doi.org/10.1016/j.colsurfa.2021.127706" @default.
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