Uptake of mercury by thiol-grafted chitosan gel beads

Merrifield, John; Davids, William G.; MacRae, Jean D.; Amirbahman, Aria

doi:10.1016/j.watres.2004.04.008

Cited by 146 publications

(99 citation statements)

References 27 publications

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“…Among them, the adsorption using solid porous materials as adsorbents is considered as the most reliable, simple, efficient and cost-effective method. Numerous synthetic and natural adsorbents have been explored, including activated carbon, polymer resins, chitosan, starch, zeolite, clays, perlite, fly ash and synthetic mesoporous silica (MCM-41 and SBA-15) [20][21][22]. However, since commercially activated carbons and synthetic mesoporous materials are expensive or their production involves the use of toxic materials, the search for alternative and cheaper natural sorbents is a particularly attractive option.…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies were performed to investigate the potential of DE as an absorbent for removing radionuclides, heavy metal ions (e.g. Pb(II), Zn(II), Cu(II), Cd(II) and Hg(II)) and textile dyes from wastewater [22][23][24]. While these studies have demonstrated a promising potential of DE for wastewater treatment, most of them used raw DE material, which is not optimized for specific applications.…”

Section: Introductionmentioning

confidence: 99%

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Functionalized diatom silica microparticles for removal of mercury ions

Addai‐Mensah

Lošić

2012

Science and Technology of Advanced Materials

125

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Diatom silica microparticles were chemically modified with self-assembled monolayers of 3-mercaptopropyl-trimethoxysilane (MPTMS), 3-aminopropyl-trimethoxysilane (APTES) and n-(2-aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPTMS), and their application for the adsorption of mercury ions (Hg(II)) is demonstrated. Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy analyses revealed that the functional groups (-SH or -NH 2 ) were successfully grafted onto the diatom silica surface. The kinetics and efficiency of Hg(II) adsorption were markedly improved by the chemical functionalization of diatom microparticles. The relationship among the type of functional groups, pH and adsorption efficiency of mercury ions was established. The Hg(II) adsorption reached equilibrium within 60 min with maximum adsorption capacities of 185.2, 131.7 and 169.5 mg g −1 for particles functionalized with MPTMS, APTES and AEAPTMS, respectively. The adsorption behavior followed a pseudo-second-order reaction model and Langmuirian isotherm. These results show that mercapto-or amino-functionalized diatom microparticles are promising natural, cost-effective and environmentally benign adsorbents suitable for the removal of mercury ions from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functionalized diatom silica microparticles for removal of mercury ions

Addai‐Mensah

Lošić

2012

Science and Technology of Advanced Materials

125

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“…In our paper, this model was brought to discuss the adsorption process. The adsorption process was mentioned in the papers of Atia AA [8] and Merrifield JD et al [9]. We will be more careful in our future research work.…”

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confidence: 87%

Reply to the Comments on “Preparation and application of 4-amino-4′-nitroazobenzene modified chitosan as a selective adsorbent for the determination of Au(III) and Pd(II)”

Wang

Bao

et al. 2010

Microchim Acta

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“…(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39) However, developing chitosan thin film doped with an ionophore as a specific heavy metal ion sensing material to combine with SPR has not been reported. A sensitive ionophore with sulfur donor atoms, i.e., tetrabutyl thiuram disulfide (TBTDS) is expected to provide high sensitivity and selectivity for Zn 2+ determination.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Tetrabutyl Thiuram Disulfide in Chitosan Thin Film for Sensing Zinc Ion Using Surface Plasmon Resonance Spectroscopy

Fen¹,

Yunus²,

Talib³

2013

Sensors and Materials

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Tetrabutyl thiuram disulfide (TBTDS) immobilized in chitosan thin film has been studied as a sensor element for zinc ion, Zn 2+ , using surface plasmon resonance (SPR). The TBTDS-immobilized chitosan thin film, which acts as an active layer, was coated on a gold film by spin coating. Zn 2+ can be detected by measuring the SPR signal when TBTDS-immobilized chitosan thin film contacts with Zn 2+ in solution. The sensor produced a linear response for Zn 2+ ranging from 0.1 to 1 ppm with a sensitivity of 0.0317° ppm −1 . Using immobilized TBTDS as an active layer, the Zn 2+ can also be selectively detected when present in mixtures of heavy metal ions.

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Uptake of mercury by thiol-grafted chitosan gel beads

Cited by 146 publications

References 27 publications

Functionalized diatom silica microparticles for removal of mercury ions

Functionalized diatom silica microparticles for removal of mercury ions

Reply to the Comments on “Preparation and application of 4-amino-4′-nitroazobenzene modified chitosan as a selective adsorbent for the determination of Au(III) and Pd(II)”

Immobilization of Tetrabutyl Thiuram Disulfide in Chitosan Thin Film for Sensing Zinc Ion Using Surface Plasmon Resonance Spectroscopy

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