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Issue 43, 2013
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Multifunctional system based on hybrid nanostructured rod formation, for sensoremoval applications of Pb2+ as a model toxic metal

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Abstract

A new and simple multifunctional system based on hybrid calcite–poly(ethyleneimine) (PEI) nanostructured rod (NR) formation, which shows as a proof-of-concept the sensing and removal (sensoremoval concept) of Pb2+ as a model toxic metal for environmental applications, has been developed. The addition of Na2CaEDTA and Na2CO3 solutions to Pb2+ contaminated water leads to the crystallization of calcite–PEI NRs. These NRs are composed of self-assembled hexagonal plate-like shapes of around 450 nm. The formed calcite–PEI NRs in suspension permit Pb2+ detection, through a simple turbidimetric measurement, and at the same time act as a Pb2+ remover. This sensing and removal system is able to detect up to 1 ppm Pb2+ (1–1000 ppm linear range) and reaches an adsorption capacity of 240 mg Pb2+ per g of NRs, as evaluated using a 342 ppm initial Pb2+ concentration at pH 4 after 30 min incubation time. The maximum Pb2+ removal capacity reported here is higher than other capacities reported previously, using materials that are not as cheap and biodegradable as calcite. The Pb2+ detection range found for this system is suitable to evaluate levels of metal contamination from industrial wastewater of around 1–100 ppm. This system based on an advanced biodegradable material constitutes a useful tool as a proof-of-concept in the design of future multifunctional platforms for the development of integrated environmental technologies with sensing and remediation functions.

Graphical abstract: Multifunctional system based on hybrid nanostructured rod formation, for sensoremoval applications of Pb2+ as a model toxic metal

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Publication details

The article was received on 30 Jul 2013, accepted on 27 Aug 2013 and first published on 29 Aug 2013


Article type: Paper
DOI: 10.1039/C3TA12986A
Citation: J. Mater. Chem. A, 2013,1, 13532-13541
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    Multifunctional system based on hybrid nanostructured rod formation, for sensoremoval applications of Pb2+ as a model toxic metal

    A. M. López_Marzo, J. Pons and A. Merkoçi, J. Mater. Chem. A, 2013, 1, 13532
    DOI: 10.1039/C3TA12986A

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