Poly(2-acrylamido glycolic acid-co-2-acrylamido-2-methyl-1-propane sulfonic acid): Synthesis, characterization, and retention properties for environmentally impacting metal ions

: Naturally occurring clay halloysite is used to synthesize novel halloysite functionalized sulfonic acid in two steps; functionalization followed by oxidation and its catalytic activity is estimated for one-pot synthesis of Hantzsch 1,4-dihydropyridines under green solvent-free conditions. Spectroscopic studies such as FTIR, TGA, elemental analysis and first-principles based quantum chemical studies are used to characterize the catalyst. Recyclability without significant loss of catalytic activity is observed for several runs.

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Novel electrodialysis cation exchange membrane prepared by 2-acrylamido-2-methylpropane sulfonic acid; heavy metal ions removal

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2017.04.074 ◽

2017 ◽

Vol 337 ◽

pp. 90-104 ◽

Cited By ~ 63

Author(s):

M. Nemati ◽

S.M. Hosseini ◽

M. Shabanian

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Cation Exchange ◽

Sulfonic Acid ◽

Heavy Metal Ions ◽

Cation Exchange Membrane ◽

Heavy Metal Ions Removal ◽

Exchange Membrane ◽

Metal Ions Removal

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Synthesis and Chelation Properties of a New Polymeric Ligand Derived from 1-Amino-2-Naphthol-4-Sulfonic Acid

Journal of AOAC International ◽

10.5740/jaoacint.12-134 ◽

2015 ◽

Vol 98 (1) ◽

pp. 188-191

Author(s):

Dhanasekaran Manivannan ◽

Valsala Madhavan Nair Biju

Keyword(s):

Metal Ions ◽

Sulfonic Acid ◽

Divalent Metal ◽

Chelating Resin ◽

Spectral Studies ◽

Divalent Metal Ions ◽

Solid Sorbent ◽

Lead And Zinc ◽

Copper Manganese ◽

Seawater Samples

Abstract A novel chelating resin for preconcentration of heavy metals from various seawater samples has been developed by condensing 1-amino-2-hydroxy-7-[(4-hydroxyphenyl)diazenyl] naphthalene-4-sulfonic acid (AHDNS) with formaldehyde (1:2 mole ratio) in the presence of oxalic acid as the catalyst. The resin thus obtained was used as a solid sorbent for the separationof divalent metal ions present attrace levels in seawater. The functionalized phenol (AHDNS) was characterized by spectral studies. The polymeric resin AHDNS-formaldehyde (AHDNS-F) obtained by condensing thefunctionalized phenol and formaldehyde was characterized by IR and NMR spectral studies. The chelating property of the AHDNS-F resin towards divalent metal ions was studied as a function of pH and in the presence of electrolyte. The metal uptake properties of the resin were determined by using an atomic absorption spectrophotometer. This procedure was validated for recovery of divalent metal ions from seawater samples. The recoveries of cadmium, cobalt, copper, manganese, lead, and zinc were above 92% under the optimum preconcentration conditions. The LOD was <0.73 μg/L and the RSDs were <2%. Thus, the AHDNS-F resin can be widely used as a solid sorbent for the preconcentration of trace metals at ppm levelsin seawater samples.

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