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Selective separation of some ecotoxic transition metal ions from aqueous solutions using immobilized macrocyclic material containing solid phase extraction system

100%

Rahman I., Furusho Y., Begum Z., Sabarudin A., Motomizu S., Maki T., Hasegawa H.

Open Chemistry

2011

vol. 9

issue 6

1019-1026

A simple flow-based method was developed for the simultaneous separation of certain transition metal ions (Co, Ni, Cu, Zn, Cd) from aqueous systems, which ions show ecotoxic effects when present at elevated concentrations. A silica-gel-bonded macrocycle system, commonly known as molecular recognition technology (MRT) gel, was used for solid phase extraction (SPE) of the target analytes. The collection behavior of the MRT-SPE system was studied based on pH. Fortified deionized water samples containing 250 µg L−1 of each of the elements were treated at the flow rate of 1 mL min−1. The collected analytes were then eluted by 3 M HNO3 and analyzed using inductively coupled plasma spectrometry. Detection limits of the proposed technique were in the range of 0.004–0.040 µg L−1 for the studied metal ions. The validity of this separation technique was checked with spiked ‘real’ water samples, which produced satisfactory recoveries of 96–102%. The non-destructive nature and highly selective ion-extraction capability of the SPE material are the most important aspects of the proposed method and they are the main focus of this paper. [...]

Erratum to: ”Selective separation of some ecotoxic transition metal ions from aqueous solutions using immobilized macrocyclic material containing solid phase extraction system”

100%

Rahman I., Furusho Y., Begum Z., Sabarudin A., Motomizu S., Maki T., Hasegawa H.

Open Chemistry

2012

vol. 10

issue 1

277-277

The original version of the article was published in Cent. Eur. J. Chem. 9(6) (2011), pp 1019–1026. Unfortunately, the original version of this article contains mistakes in the body of Fig. 1. Here we display the corrected version of the Fig. 1.

Non-Destructive Harvesting of Biogenic Gold Nanoparticles fromJatropha curcasSeed Meal and Shell Extracts and their Application as Bio-Diagnostic Photothermal Ablaters-Lending Shine to the Biodiesel Byproducts

86%

Sheikh Mohamed M., Baliyan A., Veeranarayanan S., Cheruvathoor Poulose A., Nagaoka Y., Minegishi H., Yoshida Y., Maekawa T., Sakthi Kumar D.

Nanomaterials and the Environment

2013

vol. 1

3-17

A potential non-destructive harvesting of gold nanoparticles (Au NPs) employing the seed shell and detoxified-defatted seed meal aqueous extracts of Jatropha curcas is reported. The reduction potential of the shell and meal extracts were tested at varied ratios with chloroauric acid under physical parameters of increasing pressure and temperature. The optimal ratio of chloroauric acid to seed meal/shell extracts was determined to be 1:1 under constant shaking in water bath at 60ºC yielding nearly isotropic nanoparticles, which was confirmed by UV-Vis spectroscopy, HRTEM and AFM analysis. With increasing concentrations (1:2, 1:3, 1:4) of reducing agents, temperature (121ºC) and pressure (12 lbs), anisotropy with respect to particle shape and size increased in order. FT-IR, TGA and HRTEM provided evidence of bio-capping of the nanoparticles with biomolecules present in the parent reducing sources. The biocompatibility of these nanoparticles was tested on neuronal HCN-1A and brain cancer glioma Gl-1 cell lines, which revealed their superior cyto-amiability when compared with conventionally synthesized Au NPs. The biodiagnostic and photothermal ablation potential of the Au NPs were also tested and affirmed with the luminescent signals recorded from the cellular cytoplasm indicating the efficient internalization of these nanoparticles as well as the apoptotic events encountered upon irradiating the cells with laser. Nearly 100% of the cells underwent sudden apoptosis within 1 min of laser treatment, providing enough evidence for the thermal ablation potential of the Au NPs. To support the claim of non-destructive harvesting of nanoparticles, the protein and ash content of the seed meal and seed shell, respectively, were analyzed before and after the aqueous extraction. Minimal loss in these inherent characteristic potentials of the seed meal and shell emphasizes the sustainable utilization of bio-resources achieved in this report.

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2 Open Chemistry

1 Nanomaterials and the Environment

2 2012

1 2011

2 Begum Z.

2 Furusho Y.

2 Hasegawa H.

2 Maki T.

2 Motomizu S.

2 Rahman I.

2 Sabarudin A.

1 Baliyan A.

1 Cheruvathoor Poulose A.

1 Maekawa T.

1 Minegishi H.

1 Nagaoka Y.

1 Sakthi Kumar D.

1 Sheikh Mohamed M.

1 Veeranarayanan S.

1 Yoshida Y.

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Selective separation of some ecotoxic transition metal ions from aqueous solutions using immobilized macrocyclic material containing solid phase extraction system

Erratum to: ”Selective separation of some ecotoxic transition metal ions from aqueous solutions using immobilized macrocyclic material containing solid phase extraction system”

Non-Destructive Harvesting of Biogenic Gold Nanoparticles fromJatropha curcasSeed Meal and Shell Extracts and their Application as Bio-Diagnostic Photothermal Ablaters-Lending Shine to the Biodiesel Byproducts