Dual-functionalized strontium phosphate hybrid nanopowder for effective removal of Pb2 + and malachite green from aqueous solution

Fan Zhang, Xin Chen, Wanning Zhang, Yuefei Ji

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)128-134
Number of pages7
JournalPowder Technology
Volume318
DOIs
StatePublished - Aug 2017

Keywords

  • Mechanism
  • Pb and malachite green
  • Removal
  • Strontium phosphate nanopowder

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