期刊
MATERIALS LETTERS
卷 59, 期 4, 页码 399-403出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2004.05.090
关键词
nanomaterials; X-ray techniques; surfaces; adsorbent; water treatment; arsenate
A novel adsorbent, ceria supported on carbon nanombes (CeO2-CNTs), was developed for the removal of arsenate from water. The experiments show that CeO2-CNTs is an effective adsorbent for arsenate, and the adsorption is pH-dependent. Ca2+ and Mg2+ significantly enhanced its adsorption capacity, which suggests that it is a promising adsorbent for drinking water purification. Under natural pH conditions, an increase from 0 to 10 mg/L in the concentration of Ca2+ and Mg2+ results in an increase from 10 to 81.9 and 78.8 mg/g in the amount of As(V) adsorbed, respectively. The loaded adsorbent can be efficiently regenerated by diluted NaOH, and a regeneration efficiency of 94% was achieved using 0.1 mol/L NaOH. The adsorption mechanism was also suggested. (C) 2004 Elsevier B.V. All rights reserved.
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