Determination of metal ions in natural waters by flame-AAS after preconcentration on a 5-amino-1,3,4-thiadiazole-2-thiol modified silica gel

Journal Article · Thu Jul 01 00:00:00 EDT 1999 · Analytical Letters

DOI:https://doi.org/10.1080/00032719908542935· OSTI ID:679180

Magalhaes Padilha, P de; Federici Padilha, C C ^[1]; Moreira, J C ^[2]; Dias Filho, N L ^[3]

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1. UNESP, Botucatu, Sao Paulo (Brazil). Inst. de Biociencias
2. UNESP, Araraquara, Sao Paulo (Brazil). Inst. de Quimica
3. UNESP, Ilha Solteira, Sao Paulo (Brazil). Dept. de Fisico-Quimica

5-amino-1,3,4-thiadiazole-2-thiol groups attached on a silica gel surface have been used for adsorption of Cd(II), Co(II), Cu(II), Fe(III), Ni(II), Pb(II) and Zn(II) from aqueous solutions. The adsorption capacities for each metal ion were (in mmol.g{sup {minus}1}): Cd(II) = 0.35, Co(II) = 0.10, Cu(II) = 0.15, Fe(III) = 0.20, Hg(II) = 0.46, Ni(II) = 0.16, Pb(II) = 0.13 and Zn(II) = 0.15. The modified silica gel was applied in the preconcentration and quantification of trace level metal ions present in water samples (river, and bog water).

• Sponsoring Organization: USDOE
• OSTI ID: 679180
• Journal Information: Analytical Letters, Vol. 32, Issue 9; Other Information: PBD: Jul 1999
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
40 CHEMISTRY
POLLUTION CONTROL
CHEMICAL ANALYSIS
METALS
FRESH WATER
ABUNDANCE
SILICA GEL
ABSORPTION
INFRARED SPECTRA
PH VALUE
EXPERIMENTAL DATA