Removal of As(V) and Sb(V) in aqueous solution by Mg/Al-layered double hydroxide-incorporated polyethersulfone polymer beads (PES-LDH)
Removal of As(V) and Sb(V) in aqueous solution by Mg/Al-layered double hydroxide-incorporated polyethersulfone polymer beads (PES-LDH)
复制标题
DOI：
10.1007/s10653-018-0087-y
复制
发表时间：
2018-03
影响因子：
4.2
通讯作者：
Sang-Ho Lee;Heechul Choi;Kyoung-Woong Kim
中科院分区：
文献类型：
--
作者：
Sang-Ho Lee;Heechul Choi;Kyoung-Woong Kim
为了开发一种去除水中砷和锑的新型颗粒吸附剂，采用核壳法在anN， n -二甲基甲酰胺溶液中制备了含有25%聚醚砜的煅烧Mg/ al层状双氢氧化物(CLDH)-聚醚砜（PES）颗粒吸附剂（PES- ldh）。PES-LDH呈球形中空，表面粗糙，平均粒径为1 ~ 2 mm。在PES- ldh表面，通过PES和CLDH之间的固结，成功地固定了纳米级CLDH （100-150 nm）。PES-LDH对Sb(V)的吸附效果优于As(V), As(V)和Sb(V)的最大吸附量分别为7.44和22.8 mg/g。再生结果表明，0.5 M NaOH和5 M NaCl的混合溶液对As(V)的吸附和脱附再生效率达到80%。尽管PES-LDH对Sb(V)的吸附效率远高于As(V)，但由于Sb(V)的结合亲和力较强，其再生效率逐渐下降。该研究表明，聚醚- ldh是一种很有前途的颗粒吸附剂，可用于废水中As(V)和Sb(V)的修复。
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 anN,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.