The study of adsorption activity of chromium ion (Cr(VI)) in chitosan based new materials

Authors

  • Majigsuren Enkhtuya Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia https://orcid.org/0000-0002-8052-4466
  • Shirendev Nasanjargal Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia
  • Byambasuren Ulziidelger Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia
  • Yunden Ganchimeg Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia

DOI:

https://doi.org/10.5564/bicct.v10i10.2595

Keywords:

adsorbent, metal ion, aqueous medium, adsorption capacity

Abstract

In this research work, a new type of absorbent material was obtained using kaolin which is produced by clay of the
"Tsogt-Ovoo" deposit in Umnogovi province. The kaolin was produced by removing its mechanical impurities from clay and
treating it to acid and heat treatment. When producing a chitosan based new absorbent bead, pure chitosan and mixtures of chitosan
and kaolin (8:1, 8:2 and 8:3) with certain ratios were subjected to chemical processing. It was determined that the absorption
capacity of chromium ion (Cr(VI)) was the highest when chitosan and kaolin mass ratio was 8:2. The adsorption activity of Cr(VI)
in chitosan-based adsorbent was studied depending on the pH of the solution, time, temperature, initial concentration of chromium
ion solution and mass of adsorbent material. The degree of absorption was the highest (80.25%) when initial concentration of the
chromium ion solution is 50 mg/l, temperature is 250C, contact time is 3h and the mass of the adsorbent material is 0.1 g. It shows
that this chitosan based adsorbent bead can be used for the separation of chromium (Cr(VI)) from aqueous solutions.

Читосан суурьтай шинэ материалын +6 валенттай хром шингээх идэвхийн судалгаа

Хураангуй: Тус судалгааны ажлын хүрээнд Өмнөговь аймгийн нутагт орших “Цогт-Овоо” ордын шаврын дээжийг механик
хольцоос салган, хүчлийн ба дулааны боловсруулалтад оруулж бэлтгэсэн каолиныг ашиглан шинэ төрлийн шингээгч
материал гарган авав. Читосан суурьтай, үрэл хэлбэрийн шинэ төрлийн шингээгч материалыг гарган авахдаа цэвэр читосан
болон тодорхой харьцаа бүхий читосан ба каолины (8:1, 8:2 ба 8:3) хольцыг химийн боловсруулалтад оруулж гарган авсан.
Туршилтаар 8:2 массын харьцаа бүхий читосан ба каолинын хольцыг ашиглан гарган авсан үрэл хэлбэрийн шингээгч
материалын +6 валенттай хром (Cr(VI)) шингээх шингээлтийн багтаамж хамгийн өндөр болохыг тогтоов. Читосан суурьтай
шинэ төрлийн шингээгч материалын усан уусмалаас Cr(VI) шингээх идэвхийг уусмалын рН, хугацаа, температур, хромын
уусмалын анхны концентраци ба шингээгч материалын массаас хамааруулан судалж үзэхэд уусмалын орчин pH 3,
шингээлтийн хугацаа 3 цаг, шингээлтийн температур T= 25℃, хромын уусмалын анхны концентраци 50 мг/л, шингээгч
материалын масс 0.1 г байх нөхцөлд шингээлтийн зэрэг хамгийн өндөр буюу 80.25% байна. Энэхүү шинэ материалыг усан
уусмалаас хромыг (Cr(VI)) ялгахад ашиглах боломжтой гэж үзэж байна.

Түлхүүр үг: адбсорбент, металлын ион, усан орчин, шингээлтийн багтаамж

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Published

2022-12-27

How to Cite

Enkhtuya, M., Nasanjargal, S., Ulziidelger, B., & Ganchimeg, Y. (2022). The study of adsorption activity of chromium ion (Cr(VI)) in chitosan based new materials. Bulletin of the Institute of Chemistry and Chemical Technology, 10(10), 58–64. https://doi.org/10.5564/bicct.v10i10.2595

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