2022
DOI: 10.30970/vch.6301.181
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Sorption of Yb(III) from aqueous solution on Na-clinoptilolite

Abstract: Вивчено сорбційні властивості Na-форми закарпатського клиноптилоліту стосовно слідових кількостей Yb(III) у динамічних умовах. Визначено оптимальні умови сорбції Yb(III) залежно від рН та концентрації розчину, термічної обробки сорбенту, впливу поширених іонів вод. Сорбційна ємність Na-форми клиноптилоліту щодо Yb(III) становить 8 100 мкг/г. Найкращим десорбентом Yb(III) є 1 М KCl, підкислений розчином HCl до рН 4,0, який забезпечує практично повне вилучення Ітербію. Розроблено методику концентрування слідових… Show more

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“…In more alkaline solutions, the sorption of Nd(III) decreases sharply. It is known [ 30 , 31 , 33 , 44 ] that the sorption-active centers of the Na-form of Transcarpathian clinoptilolite concerning most heavy metals are mostly surface OH groups. That is why the character of the Nd(III) sorption process can be caused by the chemical features of the Na-clinoptilolite surface and by possible forms of Nd(III) in aqueous solutions at different pH values.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…In more alkaline solutions, the sorption of Nd(III) decreases sharply. It is known [ 30 , 31 , 33 , 44 ] that the sorption-active centers of the Na-form of Transcarpathian clinoptilolite concerning most heavy metals are mostly surface OH groups. That is why the character of the Nd(III) sorption process can be caused by the chemical features of the Na-clinoptilolite surface and by possible forms of Nd(III) in aqueous solutions at different pH values.…”
Section: Resultsmentioning
confidence: 99%
“…The sorption properties of Na-modified Transcarpathian clinoptilolite also depend on thermal pre-treatment [ [30] , [31] , [32] , [33] , 44 ]. That is why the Na-clinoptilolite samples were heated to different temperatures for 2.5 h and after cooling in a desiccator their sorption capacity towards Nd(III) was determined.…”
Section: Resultsmentioning
confidence: 99%