摘要

In view of water pollutants becoming more complex, both anionic and cationic pollutants need to be removed. The multi-pollutants simultaneous removal is paid more and more attention. Hence, development composite materials for treatment complex wastewater are the aim of this study. In this research, iron-nickel nanoparticles deposited onto aluminum oxide (-Al2O3) and carbon nanotubes (CNTs) to form nanocomposite materials Fe-Ni/Al2O3 and Fe-Ni/CNTs, respectively, were used as adsorbents. The adsorption capacities of Fe-Ni/Al2O3 and Fe-Ni/CNTs for AO7, HSeO3-, and Pb2+ were observed to be 5.46, 8.28, 27.02, and 25.6mg/g, 15.29 and 17.12mg/g, separately. The composite materials with negative charges were superior in adsorption of anionic pollutants. Using orthogonal experimental design and analysis of variance to co-treat dye AO7, HSeO3- and Pb2+ in aqueous solutions, seven testing factors were included: (1) adsorbent types, (2) amount of iron, (3) solution pHs, (4) AO7 concentrations, (5) Pb2+ concentrations, (6) HSeO3- concentrations and (7) reaction time. The experimental results showed that the removal of complex pollutants AO7, HSeO3-, and Pb2+ on Fe-Ni/CNTs could reach up to 90% in the optimal treatment conditions. When using Fe-Ni/CNTs as the adsorbent, the sorption isothermals were well fitted in the Freundlich isotherm, and R2 could reach up to 0.98.

  • 出版日期2013-6

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