期刊
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
卷 40, 期 5, 页码 2119-2129出版社
SPRINGER
DOI: 10.1007/s10653-018-0087-y
关键词
Layered double hydroxide; Arsenic; Antimony; Polyethersulfone; Granulation
类别
资金
- Brain Korea 21 Plus Project (BK21 Plus) of School of Environmental Science and Engineering at Gwangju Institute of Science and Technology (GIST), Korea
- Grants-in-Aid for Scientific Research [17F17084] Funding Source: KAKEN
To develop a novel granular adsorbent to remove arsenic and antimony from water, calcined Mg/Al-layered double-hydroxide (CLDH)-incorporated polyethersulfone (PES) granular adsorbents (PES-LDH) were prepared using a core-shell method having 25% PES in an N,N-dimethylformamide solution. The PES-LDH displayed a spherical hollow shape having a rough surface and the average particle size of 1-2 mm. On the PES-LDH surface, nanosized CLDH (100-150 nm)was successfully immobilized by consolidation between PES and CLDH. The adsorption of Sb(V) by PES-LDH was found to be more favorable than for As(V), with the maximum adsorption capacity of As(V) and Sb(V) being 7.44 and 22.8 mg/g, respectively. The regeneration results indicated that a 0.5 M NaOH and 5 M NaCl mixed solution achieved an 80% regeneration efficiency in As(V) adsorption and desorption. However, the regeneration efficiency of Sb(V) gradually decreased due to its strong binding affinity, even though the PES-LDH showed much higher Sb(V) adsorption efficiency than As(V). This study suggested that PES-LDH could be a promising granular adsorbent for the remediation of As(V) and Sb(V) contained in wastewater.
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