TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Esaifan, Muayad
A1  - Warr, Laurence N.
A1  - Grathoff, Georg
A1  - Meyer, Tammo
A1  - Schafmeister, Maria-Theresia
A1  - Kruth, Angela
A1  - Testrich, Holger
T1  - Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites
from Calcite-Bearing Kaolin for the Removal of
Heavy Metal Ions in Aqueous Media
JF  - minerals
N2  - A hydroxy-sodalite/cancrinite zeolite composite was synthesized from low-grade calcite-bearing kaolin by hydrothermal alkali-activation method at 160 C for 6 h. The effect of calcite addition on the formation of the hydroxy-sodalite/cancrinite composite was investigated
using artificial mixtures. The chemical composition and crystal morphology of the synthesized zeolite composite were characterized by X-ray powder diffraction, infrared spectroscopy, scanning electron microscopy, and N2 adsorption/desorption analyses. The average specific surface area is around 17–20 m2g-1, whereas the average pore size lies in the mesoporous range (19–21 nm). The synthesized zeolite composite was used as an adsorbent for the removal of heavy metals in aqueous solutions. Batch experiments were employed to study the influence of adsorbent dosage on heavy metal removal e� ciency. Results demonstrate the effective removal of significant quantities of Cu, Pb, Ni, and Zn from aqueous media. A comparative study of synthesized hydroxy-sodalite and
hydroxy-sodalite/cancrinite composites revealed the latter was 16–24% more effcient at removing heavy metals from water. The order of metal uptake effciency for these zeolites was determined to be Pb > Cu > Zn > Ni. These results indicate that zeolite composites synthesized from natural calcite-bearing kaolin materials could represent effective and low-cost adsorbents for heavy metal removal using water treatment devices in regions of water hortage.
UN  - https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-37429
SN  - 2075-163X
SS  - 2075-163X
U6  - https://doi.org/https://doi.org/10.3390/min9080484
DO  - https://doi.org/https://doi.org/10.3390/min9080484
EP  - 484
PB  - MDPI
CY  - Basel
ER  -