Procion red MX-3B-derived poly(HEMA/EGDMA) microspheres for removal of cadmium ions

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Analytical Letters

DOI:https://doi.org/10.1080/00032719808005343· OSTI ID:305402

Denizli, A; Bueyuektuncel, E; Genc, O; Piskin, E ^[1]

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1. Hacettepe Univ., Ankara (Turkey)

The heavy metal pollution is becoming more and more serious an environmental problem throughout the world due to rapid industrialization. Heavy metals such as cadmium and mercury exhibit human toxicity at extremely low concentrations. Poly(hydroxyethyl methacrylate/ethylene glycol dimethacrylate) [poly(HEMA/EGDMA)]-Procion Red MX-3B microspheres were used for removal of Cd(II) ions from aqueous solutions containing different amounts of Cd(II) ions (5--60 ppm). Dye-derived microbeads carrying 8.95 {micro}mol Procion Red MX-3B/g polymer were used in the adsorption-desorption of Cd(II) ions. High adsorption rates were observed at the beginning of adsorption and then equilibrium was achieved in about 5--10 min. The maximum adsorption of Cd(II) ions onto the Procion Red MX-3B-derived microspheres (i.e., by chelate formation of Cd(II) ions with dye molecules) was about 4.2 mg Cd(II) ions/g polymer, which was observed at pH 7.0. While non-specific adsorption onto the underived microspheres was 0.93 mg Cd(II) ions/g polymer. More than 96% of the adsorbed Cd(II) ions was desorbed in 15 min by using 0.1 M HNO{sub 3} as an desorption agent. The regenerability of the dye-derived atmospheres was also sufficient.

• Sponsoring Organization: USDOE
• OSTI ID: 305402
• Journal Information: Analytical Letters, Journal Name: Analytical Letters Journal Issue: 15 Vol. 31; ISSN ANALBP; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ADSORPTION
AQUEOUS SOLUTIONS
CADMIUM
CHEMICAL REACTIONS
COPOLYMERS
EXPERIMENTAL DATA
MICROSPHERES
PH VALUE
POLLUTION
REMOVAL