Adsorptive performance of MCM-41 towards hg(II) in water. Adsorption and desorption studies

• Autorzy: Zhai Q. Z. , Hu W.-H. , Guo X.-Y.

Identyfikatory

DOI

10.5277/epe160101

• Języki publikacji: EN

Abstrakty

EN

MCM-41 mesoporous material was prepared under a standard conditions by using cetyltrime-thylammonium bromide as a structure-directing agent and tetraethyl orthosilicate as silica source from the liquid phase at 80 °C. Powder X-ray diffraction and scanning electron microscopy used to characterize the product, showed that the MCM-41material had an average particle size of 110 nm. The synthesized material was used to investigate the effects of acidity, adsorption time, the concentration of Hg²⁺, adsorbent dosage and temperature on the adsorption of Hg²⁺. The results showed that the optimal adsorptive conditions were: pH 5.0, m(MCM-41):mHg²⁺ 6.67, temperature 20 °C and contact adsorption time 60 min, for the initial Hg²⁺concentration of 1.0 mg/cm³. The maximum adsorptive amount of Hg²⁺ was 56.48 mg Hg²⁺/g MCM-41. The results of the desorptive effect of three desorption agents such as HCl, HNO₃ and HAc showed that the best desorbent was HCl at the concentration of 0.10 mol/dm³. The highest desorption efficiency was 77.21% for the desorption time 2 h.

Słowa kluczowe

EN

electron microscopy; mesoporous silicates; cetyltrimethylammonium bromide; adsorption conditions

PL

mikroskopia elektronowa; krzemiany mezoporowate; bromek cetyltrimethylammonium; warunki adsorpcyjne

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2016
• Tom: Vol. 42, nr 1
• Strony: 5--15
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Zhai Q. Z.

• Research Center for Nanotechnology, South Campus, Changchun University of Science and Technology, 7186 Weixing Road, Changchun 130022, Jilin Province, P.R. China

autor

Hu W.-H.

• Research Center for Nanotechnology, South Campus, Changchun University of Science and Technology, 7186 Weixing Road, Changchun 130022, Jilin Province, P.R. China

autor

Guo X.-Y.

• Research Center for Nanotechnology, South Campus, Changchun University of Science and Technology, 7186 Weixing Road, Changchun 130022, Jilin Province, P.R. China

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