TY - JOUR
T1 - Evaluation of the adsorption of ammonium-nitrogen and phosphate on a granular composite adsorbent derived from zeolite
AU - Wu, Kun
AU - Li, Yang
AU - Liu, Ting
AU - Zhang, Nan
AU - Wang, Meng
AU - Yang, Shengjiong
AU - Wang, Wendong
AU - Jin, Pengkang
N1 - Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - To remove the extra ammonium-nitrogen (NH3-N) and phosphorus (P) from contaminated water, a novel granular adsorbent (GAZCA) was fabricated with zeolite powders and Al–Mn binary oxide (AMBO) via the compression method. The SEM-EDS and mapping and XRD results illustrated the microstructure of GAZCA: the homogeneous aggregation of zeolite and AMBO nanoparticles with their crystal integrity and the uniform distribution of Al/Mn/Si/O elements on the adsorbent surface. FTIR and XPS results demonstrated the existence of impregnated sodium cations and hydroxyl groups, which were responsible for the removal of NH3-N and P, respectively. The results of BET analysis and compression tests exhibited a high surface area (14.4 m2/g) and a satisfactory mechanical strength of GAZCA. Kinetic adsorption results showed a fast adsorption rate for NH3-N and P, and mutual inference was not observed between the adsorption kinetics of NH3-N and P in the bi-component system. The adsorption isotherm results demonstrated that the maximum adsorption capacities of NH3-N and P were calculated as 12.9 mg/g and 9.3 mg/g via the Langmuir model, respectively. In the bi-component system, the adsorption capacities of NH3-N and P were maintained at low and moderate concentrations and decreased at high concentrations due to the blockage effects of NH4MnPO4·H2O precipitates. The removal efficiency of NH3-N could be maintained in a wide pH range of 4~10, while P adsorption was inhibited at alkali conditions. The solution of sodium bicarbonate (0.4 M) was used for the regeneration of saturated adsorbents, which permitted GAZCA to keep 98% and 78% of its adsorption capacity for NH3-N and P even after three regeneration and reuse cycles. Dynamic experiments illustrated that a satisfactory performance was obtained for the in situ treatment of simulated N- and P-contaminated water by using a column reactor packed with GAZCA, thus further confirming its great potential for the control of eutrophication.
AB - To remove the extra ammonium-nitrogen (NH3-N) and phosphorus (P) from contaminated water, a novel granular adsorbent (GAZCA) was fabricated with zeolite powders and Al–Mn binary oxide (AMBO) via the compression method. The SEM-EDS and mapping and XRD results illustrated the microstructure of GAZCA: the homogeneous aggregation of zeolite and AMBO nanoparticles with their crystal integrity and the uniform distribution of Al/Mn/Si/O elements on the adsorbent surface. FTIR and XPS results demonstrated the existence of impregnated sodium cations and hydroxyl groups, which were responsible for the removal of NH3-N and P, respectively. The results of BET analysis and compression tests exhibited a high surface area (14.4 m2/g) and a satisfactory mechanical strength of GAZCA. Kinetic adsorption results showed a fast adsorption rate for NH3-N and P, and mutual inference was not observed between the adsorption kinetics of NH3-N and P in the bi-component system. The adsorption isotherm results demonstrated that the maximum adsorption capacities of NH3-N and P were calculated as 12.9 mg/g and 9.3 mg/g via the Langmuir model, respectively. In the bi-component system, the adsorption capacities of NH3-N and P were maintained at low and moderate concentrations and decreased at high concentrations due to the blockage effects of NH4MnPO4·H2O precipitates. The removal efficiency of NH3-N could be maintained in a wide pH range of 4~10, while P adsorption was inhibited at alkali conditions. The solution of sodium bicarbonate (0.4 M) was used for the regeneration of saturated adsorbents, which permitted GAZCA to keep 98% and 78% of its adsorption capacity for NH3-N and P even after three regeneration and reuse cycles. Dynamic experiments illustrated that a satisfactory performance was obtained for the in situ treatment of simulated N- and P-contaminated water by using a column reactor packed with GAZCA, thus further confirming its great potential for the control of eutrophication.
KW - Ammonium-nitrogen
KW - Combined contamination
KW - Granular adsorbent
KW - Phosphate
KW - Simultaneous adsorption
UR - https://www.scopus.com/pages/publications/85065213149
U2 - 10.1007/s11356-019-05069-2
DO - 10.1007/s11356-019-05069-2
M3 - 文章
C2 - 31028616
AN - SCOPUS:85065213149
SN - 0944-1344
VL - 26
SP - 17632
EP - 17643
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 17
ER -