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

doi:10.1007/s10800-011-0360-6

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

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

34 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 language	English
Pages (from-to)	1389-1396
Number of pages	8
Journal	Journal of Applied Electrochemistry
Volume	41
Issue number	12
DOIs	https://doi.org/10.1007/s10800-011-0360-6
Publication status	Published - 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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10.1007/s10800-011-0360-6

Cite this

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

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.",

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T1 - Electrochemical detection and removal of lead in water using poly(propylene imine) modified re-compressed exfoliated graphite electrodes

AU - Ndlovu, Thabile

AU - Arotiba, Omotayo A.

AU - Sampath, Srinivasan

AU - Krause, Rui W.

AU - Mamba, Bhekie B.

PY - 2011/12

Y1 - 2011/12

N2 - 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.

AB - 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.

KW - Exfoliated graphite

KW - Lead

KW - Poly(propylene imine) dendrimer

KW - Square wave anodic stripping voltammetry

KW - Water

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

Abstract

Keywords

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