A pyridine-thiol ligand with multiple bonding sites for heavy metal precipitation

Matlock, Matthew M; Howerton, Brock S.; Henke, Kevin R.; Atwood, David A.

doi:10.1016/s0304-3894(00)00353-8

Cited by 74 publications

(44 citation statements)

References 2 publications

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“…Given the pervasive cadmium contamination and the low treatment standards [3], there is considerable interest in the development of techniques to remove cadmium from contaminated water and wastewater. Traditional methods for the removal and recovery of cadmium from industrial waste water are precipitation, ion exchange, electrolysis, and adsorption on activated carbon [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Selective Adsorption of Cadmium Species onto Organic Clay Using Experimental and Geochemical Speciation Modeling Data

Ahmed¹

2016

IJET

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Abstract-The effect of cadmium speciation on cadmium adsorption onto Hexadethyl-trimethyl ammonium (HDTMA) modified montmorillonite was investigated experimentally and using Minteqa2 geochemical speciation model. The results revealed that the increase in cadmium uptake at higher pH values is selective and directly related to the nature of species present and that this increase does not affect the form of cadmium species adsorbed onto the HDTMA modified montmorillonite.

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Section: Introductionmentioning

confidence: 99%

Selective Adsorption of Cadmium Species onto Organic Clay Using Experimental and Geochemical Speciation Modeling Data

Ahmed¹

2016

IJET

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“…For example adsorbents having ligands such as xanthate, [7] thiourea, [8] pyridine-based thiols [9] and dithiozone, [10] iminodiacetamide, [11] dipridylamide [12] and polythiourea on charcoal [13] were successfully used for binding Hg II ions. Moreover, many other alternative adsorbents for mercury including activated carbons, polymers, silicates, bacteria, chitosan clays, iron oxides, natural minerals and pyrite have also been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Polybenzoxazine: A Powerful Tool for Removal of Mercury Salts from Water

Taşkın

Kışkan

Aksu

et al. 2014

Chemistry A European J

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A reusable macroporous polybenzoxazine resin with high specific surface area was prepared as sorbent material for the removal of mercury salts. For this purpose, allyl-functionalized bis-benzoxazine was cured in dimethyl sulfoxide by thermally activated ring-opening polymerization at 180 °C for 3 d followed by a freeze-drying process. The porous structure of the resin was confirmed by SEM analysis and N2 adsorption/desorption studies at 77.3 K. Among various metal ions, namely, Pb(II), Fe(II), Mn(II), Cu(II), Zn(II), and Cd(II), the porous polybenzoxazine resin exhibited a specific sorption behaviour towards Hg(II). Mainly chemisorption and to some extent adsorption mechanisms were proposed for the observed high loading capacity of the resin. As evidenced by FTIR spectral analysis, the chemisorption is attributed to the coordination system formed between free OH and tertiary amino groups in the polybenzoxazine structure and Hg(II) ions. It was also demonstrated that the porous polybenzoxazine can be regenerated simply by treatment with acids. The resin was recycled for up to seven cycles without any significant loss of activity, as proved by sorption and desorption experiments.

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“…The reactivity of sulfur compounds toward mercuric ions is the key principle behind anchoring thiol 10 pyridine-based thiols, 15 and dithiozone 16 in highly selective mercury removal.…”

Section: Introductionmentioning

confidence: 99%

Thiol containing sulfonamide based polymeric sorbent for mercury extraction

Yavuz

Barim

Şenkal

2009

J of Applied Polymer Sci

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A new polymeric resin with thiol pendant functions has been prepared for the extraction of mercuric ions. The thiol containing sulfonamide based resin with 3.5 mmol/g total nitrogen content is able to selectively sorb mercury from aqueous solutions. The mercury sorption capacity of the resin is around 1.70 mmol/g under non-buffered conditions. Experiments performed in identical conditions with several metal ions revealed that Cd(II), Pb(II), Zn(II), Fe(III), and Fe (II) ions also were extractable in quantities (1.0-1.65 mmol/g). The sorbed mercury can be eluted by repeated treatment with 4M HNO 3 without hydrolysis of the amide groups.

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A pyridine-thiol ligand with multiple bonding sites for heavy metal precipitation

Cited by 74 publications

References 2 publications

Selective Adsorption of Cadmium Species onto Organic Clay Using Experimental and Geochemical Speciation Modeling Data

Selective Adsorption of Cadmium Species onto Organic Clay Using Experimental and Geochemical Speciation Modeling Data

Polybenzoxazine: A Powerful Tool for Removal of Mercury Salts from Water

Thiol containing sulfonamide based polymeric sorbent for mercury extraction

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