Selective removal of thiosulfate from thiocyanate-containing water by a three-dimensional structured adsorbent: a calcined NiAl-layered double hydroxide film. Issue 107 (16th October 2015)

• Record Type: Journal Article
• Authors: Liu, Xiaohua; Tian, Weiliang; Kong, Xianggui; Jiang, Meihong; Sun, Xiaoming; Lei, Xiaodong
• Is Part Of: RSC advances. Volume 5:Issue 107(2015)
• Page Start: 87948
• Page End: 87955
• Publication Date: 2015-10-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra14127c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : NiAl-layered double hydroxide (NiAl-LDH) platelets were uniformly grown on a porous Ni foam substrate by a facile in situ hydrothermal method. Abstract : NiAl-layered double hydroxide (NiAl-LDH) platelets were uniformly grown on a porous Ni foam substrate by a facile in situ hydrothermal method. By subsequent calcination, the three-dimensional (3D) structured adsorbent, a calcined NiAl-layered double hydroxide film/Ni foam (NiAl-LDO/NF) was obtained. Batch experiments were carried out to investigate the selective adsorption performance of the obtained material for thiosulfate and thiocyanate anions in water, compared with the powder NiAl-LDO adsorbent. The results show that the NiAl-LDO/NF has highly selective adsorption for S2 O3 2− in the mixture solution with a maximum adsorptive capacity of about 209.4 mg g −1 at room temperature, while the removal capacity for SCN − was only about 15.9 mg g −1 . At the same time, the resultant 3D structured adsorbent exhibited higher preferential adsorption and easier separation performance from the solution than the corresponding NiAl-LDO powder. It was found that the adsorbability and selectivity of this material was well maintained after more than 10 regeneration cycles. Therefore, the obtained 3D hierarchical NiAl-LDO/NF can be considered as a potential structured adsorbent in environmental applications for the selective removal of S2 O3 2− from SCN − -containing aqueous solution.