Electrochemical detection and removal of lead in water using poly(propylene imine) modified re-compressed exfoliated graphite electrodes

Thabile Ndlovu, Omotayo A. Arotiba, Srinivasan Sampath, Rui W. Krause, Bhekie B. Mamba

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Modification of exfoliated graphite (EG) electrode with generation 2 poly(propylene imine) dendrimer by electrodeposition resulted in an electrochemical sensor which was used to detect lead ions in water to a limit of 1 ppb and a linear response between 2.5 and 40 ppb using square wave anodic stripping voltammetry (SW-ASV). Pb(II) was also removed from spiked water sample using a 40-mm diameter unmodified EG electrode with an applied potential of -1,000 mV for 180 min. A removal efficiency of 99% was calculated from a 150 mL sample. The results obtained in both cases using SW-ASV, correlated with atomic absorption spectroscopy.

Original languageEnglish
Pages (from-to)1389-1396
Number of pages8
JournalJournal of Applied Electrochemistry
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 2011

Keywords

  • Exfoliated graphite
  • Lead
  • Poly(propylene imine) dendrimer
  • Square wave anodic stripping voltammetry
  • Water

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry
  • Materials Chemistry

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