Hybrid strontium phosphate nanopowder (called SP for short) were prepared by a one-pot hydrothermal method and characterized by SEM, EDS, TEM, and XRD. The dual removal of Pb2 + and malachite green (MG) by SP from aqueous solution was systematically investigated. Experiments were carried out in a batch system to optimize operation variables such as solution pH, temperature, adsorbent dosage, and contact time. The adsorption capacity of SP was 829 mg g− 1 and 763 mg g− 1 for Pb2 + and MG (C0 = 1000 mg L− 1, at pH 3.5, 45 °C, reaction time of 2 h), respectively. Moreover, SP could be reused for five cycles with a minimal loss of capability (20–30%). Interaction mechanisms were proposed to be ion exchange between Pb2 + and Sr2 + in the lattice and the hydrogen bonds between PO43 − in hybrid Pb/Sr-contained phosphate and positively charged hydrogen in MG. This study indicated that SP nanopowder could be facilely produced at a low price and potentially be used as an effective material for removal of both Pb2 + and MG in aqueous solution.
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© 2017 Elsevier B.V.
- Pb and malachite green
- Strontium phosphate nanopowder