Sorption of metal cations on natural sorbents: Current state, problems and prospects

Вигдорович, В. И.; Цыганкова, Л. Е.; Shel, N. V.; Esina, M.N.; Omutkov, M. S.; Pustynnikov, Ya. A.

doi:10.1134/s1995421217040189

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“…Установлено, что обменная емкость глауконита зависит от рН раствора: в щелочной среде она значительно увеличивается, а в кислой -снижается. С ростом величины рН с 6,5 до 10 возрастает коэффициент извлечения катионов металлов на 7-10% [17,18].…”

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Sorption of metals on glauconite in conditions of gastrointestinal tract of calves

Filippova

Kiiko

Maslova

2019

Rossiiskaia selskokhoziaistvennaia nauka

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The ion-exchange properties of the enterosorbent prepared on the basis of a modified concentrate (50%) of glauconite from the Bondar deposit were studied under conditions of passage of calves through the gastrointestinal tract.Chemical modification of the mineral was carried out by transfer to the Na-form.Experienced calves daily for 6 and 9 days fed enterosorbent in the amount of 0.2 g/kg body weight. The character of excretion with excrement of metal ions accumulated on the active surface of glauconite was studied. The results of the assessment of its sorption capacity in relation to Ni (toxicant), Cu (micronutrient) and Ca (macronutrient) are presented.The sorbent showed high efficiency against nickel - up to 60% of the total amount is excreted from animals. With respect to copper, average efficiency (13%). The sorbent accumulates in the digestive tract of animals for 3-4 days.Under the conditions of copper deficiency in the ration feed, this contributes to its better assimilation from inorganic forms. Feeding animals with an enterosorbent at the indicated dose does not affect the excretion of calcium from their bodies.

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