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Sorption of ammonium and phosphate ions from aqueous solutions by carbon and mineral sorbents

Zakutevskyy Oleg, Shaposhnikova Tatyana, Kotynska Lyudmila, Biedrzycka Adrianna, Skwarek Ewa

Physicochemical Problems of Mineral Processing

2022

Vol. 58, iss. 4

art. no. 150285

A search for a sorbent capable of simultaneously extracting both phosphate anions and ammonium cations from a highly competitive medium like the biological environment of the human’s body was realized. For this purpose a comparative study of a sorption of ammonium and phosphate ions from aquatic environments in the absence of any backgrounds electrolytes and from Ringer's solution by activated charcoal, its oxidized forms and mineral amorphous sorbents – powdered titanium silicate, as well as spherically granular hydrous zirconium silicate and titanium dioxide, obtained by original methods of synthesis, as well as some of their ion-substituted forms in comparison with commercially available silica gel was carried out. The features of the sorption of ammonium cations and phosphate anions by the studied sorbents are discussed. It was established that sorption properties of the sorbents depend strongly from their chemical nature. It determines a selectivity of ion-exchange and a possibility of chemosorption processes in Ringer's solution. A relationship between the sorption of calcium cations and phosphate anions from Ringer's solution was supposed which made it possible to assume the chemosorption mechanism. Based on the sorption mechanism understanding the sorption properties of titanium silicate with respect to phosphate anions were considerable improved by converting the initial sample into Ca- and Ce-ion-substituted forms without significant loss of its high sorption properties toward ammonium cations

Solvent extraction of inorganic and organic cations by octakis-O-diphenoxyphosphoryl-tetramethylcalix[4]resorcinarene

Taraszewska J., Koźbiał M.

Chemia Analityczna

2002

Vol. 47, No. 3

409-418

Extraction of alkali metal, alkaline-earth metal Mg(II), Ca(II) cations and ammonium picra-tes as well as of Eu(IIl) and La(IlI) nitrates by complexation with octakis-O-diphenoxyphos-phoryl-tetramethylcalix[4] resorcinarene was studied by a liquid-liquid extraction from aqueous phase into chloroform. Extraction percentages (E%), stoichiometry and overall extraction constants (Kex) were determined. E% increased in the order lanthanum, europium >alka-line earth cations >ammonium cations>alkali cations. The stoichiometry of the complexes was 1:1. Kex increased with the increase of cation charge.

Zbadano ekstrakcję z fazy wodnej pikrynianów metali alkalicznych, ziem alkalicznych Mg(II), Ca(II) i alkiloammoniowych oraz azotanów Eu(III) i La(lII) w wyniku komplekso-wania roztworem oktakis- difenoksyfosforylo-tetrametylokaliks[4]rezorcynarenu w chloroformie. Wyznaczono procenty ekstrakcj i (E%), stechiometrie, i stale ekstrakcj i (Kex). E% wzrastał w kolejności, lantan, europ >kationy metali ziem alkalicznych >kationy alkiloamo-niowe >kationy metali alkalicznych. Stechiometria kompleksów była1: 1. Kex wzrastała ze wzrostem ładunku kationu