The binding energy between the interlayer cations and montmorillonite layers and its influence on Pb2+ adsorption
Source abstract
Abstract
Abstract Raw montmorillonite (Mt) was cation-exchanged with Ca2 +, Mg2 +, and Fe3 +, and Pb2 + was tested for its adsorption on the exchanged Mt. The d-value and the cation exchange capacity (CEC) of Ca-exchanged montmorillonite (Ca2 + + Mt) were larger than those of Mg-exchanged montmorillonite (Mg2 + + Mt) and Fe-exchanged montmorillonite (Fe3 + + Mt). The Pb2 + adsorption on the homoionic Mt was fast and the amount of Pb2 + adsorption followed the order of Ca2 + + Mt > Mg2 + + Mt > Fe3 + + Mt. Simulation of Pb2 + adsorption on the Mt revealed a much larger energy drop when Pb2 + is substituting for Ca2 + in comparison to Pb2 + exchanging for Fe3 +.
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Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Chemical Synthesis and Characterization · Analytical chemistry methods development
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