Simultaneous removal of NH4+ and PO43- from simulated reclaimed waters by modified natural zeolite. Preparation, characterization and thermodynamics

• Autorzy: Alshameri A. , He H. , Dawood A. S. , Zhu J.

Identyfikatory

DOI

10.5277/epe170407

• Języki publikacji: EN

Abstrakty

EN

Natural zeolite was modified by NaCl, AlCl₃ and thermal treatment for the removal of NH₄⁺ and PO₄³⁻ ions. The characteristics of the modified zeolite (AlZ) and its mechanism for the NH₄⁺ and PO₄³⁻ removal were studied and compared. The results showed that the surface area and the Na⁺ and Al³⁺ content increased whereas the content of Ca²⁺, K⁺ and Mg²⁺ decreased after zeolite modification. On natural zeolite when activated with the 1 M NaCl and 10 cm³ /g of pillaring dosage, high adsorption efficiencies for the NH₄⁺ (97.80%) PO₄³⁻ (98.60%) were obtained. The results of various analyses indicated that the Na⁺ exchange is the main mechanism for NH₄⁺ removal whereas the adsorption mechanism for PO₄³⁻ followed the complexation with Al–OH groups present in the AlZ. In addition, the kinetics study showed that the adsorption of NH₄⁺ and PO₄³⁻ followed pseudo-second order model while the adsorption isotherm of NH₄⁺ and PO₄³⁻ is consistent with the Langmuir isotherm model. Moreover, the Gibbs free energy change for the simultaneous removal of the ions indicates that NH₄⁺ is adsorbed faster compared to PO₄³⁻. The simultaneous removal of NH₄⁺ and PO₄³⁻ by AlZ adsorbent is cost effective in water treatment at low ion concentrations.

Słowa kluczowe

EN

Langmuir isotherm; struvite crystallization; nitrogen

PL

izoterma Langmuira; krystalizacja struwitu; azot

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2017
• Tom: Vol. 43, nr 4
• Strony: 73--92
• Opis fizyczny: Bibliogr. 25, tab., rys.

Twórcy

autor

Alshameri A.

• CAS Key Laboratory of Mineralogy and Metallogeny, and Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
• Geological Survey and Mineral Resources Board, Ministry of Oil and Minerals, Sana’a, Yemen

autor

He H.

• CAS Key Laboratory of Mineralogy and Metallogeny, and Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China

autor

Dawood A. S.

• College of Engineering, University of Basrah, Basrah, Iraq

autor

Zhu J.

• CAS Key Laboratory of Mineralogy and Metallogeny, and Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).