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Equilibrium studies in natural waters: Speciation of phenolic compounds in synthetic seawater at different salinities
Author(s) -
Gianguzza Antonio,
De Stefano Concetta,
Sammartano Silvio,
Demianov Piotr
Publication year - 1995
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620140505
Subject(s) - seawater , chemistry , artificial seawater , protonation , phenol , ionic strength , potassium , phenols , inorganic chemistry , magnesium , genetic algorithm , sodium , ionic bonding , environmental chemistry , ion , organic chemistry , aqueous solution , ecology , biology
Interactions between some phenolic compounds and macro‐constituents of synthetic seawater (Na + , K + , Ca 2+ , Mg 2+ , Cl − , and SO 2− 4 ), at 20, 35, and 45%0 salinity, have been investigated potentiometrically by using the [H]‐glass electrode. The formation constants of phenol, o ‐ and p ‐cresol, o ‐ and p ‐nitrophenol complexes with sodium, potassium, calcium, and magnesium ions have been determined in the ionic strength range 0 ≤ I ≤ 1 mol/L. A comparison between the apparent protonation constants of phenols determined in synthetic seawater, and those simulated by a suitable complex formation model, is discussed. The possibility of calculating, by simulation, the apparent protonation constants of some chlorophenolic compounds in synthetic seawater is also reported.