Coulometric determination of organic compounds with methylviologen cation-radical

Lozano, C. Martinez; Ruiz, T. Pérez; Pérez-Ruíz, Tomás; Romero, M. I.

doi:10.1016/0026-265x(89)90009-x

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Several other less commonly used methods are available for determining 2-nitrophenol and 4-nitrophenol in environmental samples. Some of these methods are spectrometric measurement in the presence of crown ethers (Papadoyannis et al 1983), coulometric measurement with methylviologen radical cation (Lozano et al 1989), HPLC-surface-enhanced resonance Raman scattering (Ni et al 1989), GC-FID (flame ionization detector) with a special graphitized carbon black as the GC stationary phase (Mangani et al 1986), remote fluorescence analysis of ground water with UV lasers and fiber optics (Chudyk et al 1985), HPLC with diode-array UV-visible detector (Nielen et al 1985), and cyclic voltammetric determination by the addition of a-cyclodextrin (Matsue et al 1981).…”

Section: Environmental Samplesmentioning

confidence: 99%

Glauconite as a sorbent of 4-nitrophenol

Makhova¹,

Doronin²

2021

CBE

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The sorption properties of glauconite from Beloozersk deposits (Saratov region) for 4-nitrophenol (4-NF) have been investigated. The effect of glauconite on pH and 4-nitrophenol structure in solution is estimated. It is shown that glauconite increases pH of aqueous environment to 8 and shifts the equilibrium towards the formation of aci-form 4-NF. The conditions of sorption 4-NF by glauconite are established: the sorption time 20 min, the mass of the sorbent (0.50–1.0) g. The isotherm of sorption by 4-NF glauconite has been obtained; its interpretation is given using the Langmuir and Freundlich equations. The main quantitative sorption characteristics of glauconite such as recovery (R = 64%), distribution coefficient (D = 88) and the Langmuir and Freundlich constants for 4-nitrophenol are calculated. These experiments indicate the potential use of the glauconite from Beloozersk deposits (Saratov region) for 4-NP from various waters.

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