Enhanced interlayer trapping of Pb(II) ions within kaolinite layers:intercalation, characterization, and sorption studies

Maged, A. and Ismael, I.S. and Kharbish, S. and Sarkar, B. and Peräniemi, S. and Bhatnagar, A. (2020) Enhanced interlayer trapping of Pb(II) ions within kaolinite layers:intercalation, characterization, and sorption studies. Environmental Science and Pollution Research, 27 (2). 1870–1887. ISSN 0944-1344

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Abstract

Lead (Pb(II)) pollution in water poses a serious threat to human health in many parts of the world. In the past decades, research has been aimed at developing efficient and cost-effective methods to address the problem. In this study, dimethyl sulfoxide (DMSO) and potassium acetate (K-Ac) intercalated kaolinite complexes were synthesized and subsequently utilized for Pb(II) removal from water. The intercalation of kaolinite with DMSO was found to be useful for expanding the interlayer space of the clay mineral from 0.72 to 1.12 nm. Kaolinite intercalation with K-Ac (KDK) increased the interlayer space from 1.12 to 1.43 nm. The surface area of KDK was found to be more than threefold higher as compared to natural kaolinite (NK). Batch experimental results revealed that the maximum Pb(II) uptake capacity of KDK was 46.45 mg g−1 which was higher than the capacity of NK (15.52 mg g−1). Reusability studies showed that KDK could be reused for 5 cycles without substantially losing its adsorption capacity. Furthermore, fixed-bed column tests confirmed the suitability of KDK in continuous mode for Pb(II) removal. Successful application of intercalated kaolinite for Pb(II) adsorption in batch and column modes suggests its application in water treatment (especially removal of divalent metals).

Item Type:
Journal Article
Journal or Publication Title:
Environmental Science and Pollution Research
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2307
Subjects:
ID Code:
139440
Deposited By:
Deposited On:
10 Dec 2019 15:50
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 08:11