Fabrication of Chitosan-Reinforced ZrxAl1-xOOH Nanocomposites and Their Arsenite and Fluoride Depollution Densities from Single/Binary Systems
Fabrication of Chitosan-Reinforced ZrxAl1-xOOH Nanocomposites and Their Arsenite and Fluoride Depollution Densities from Single/Binary Systems
复制标题
DOI：
10.1002/slct.201701072
复制
发表时间：
2017-07
期刊：
影响因子：
--
通讯作者：
S. M. Prabhu;K. Sasaki
中科院分区：
文献类型：
--
作者：
S. M. Prabhu;K. Sasaki
通过简单的共沉淀方法合成了独特且多功能的吸附剂羟基氧化锆（ZrOOH）、羟基氧化铝（AlOOH）、羟基氧化锆铝（ZrxAl1-xOOH）和壳聚糖负载羟基氧化锆（CS@ZrxAl1-xOOH）。 CS被用作柱状载体来增强ZrxAl1-xOOH，所得材料能够同时吸附F−和AsO33−，因为CS的官能团促进了ZrOOH和AlOOH纳米粒子的形成。有趣的是，ZrxAl1-xOOH和CS@ ZrxAl1-xOOH在pH 9时具有更好的F−吸附能力。CS@ZrxAl1-xOOH对AsO33−和F−的Langmuir最大吸附容量分别为0.655和0.983 mmol g−1，其性能优于先前报道的金属氧化物和壳聚糖基吸附剂。此外，共存阴离子的存在表明，CS@ZrxAl1-xOOH 材料在二元批处理系统中选择性去除 AsO33− 而不是 F−。吸附剂的吸附动力学非常符合准二阶模型。由于同时快速的吸收能力和成本效益，CS@ZrxAl1-xOOH纳米复合材料在环境净化方面具有潜在的应用。
The unique and versatile adsorbents zirconium oxyhydroxide (ZrOOH), aluminum oxyhydroxide (AlOOH), zirconium-aluminum oxyhydroxide (ZrxAl1-xOOH) and chitosan-supported zirconium-aluminum oxyhydroxide (CS@ZrxAl1-xOOH) were synthesized via a simple co-precipitation method. CS was used as a pillar-like support to reinforce the ZrxAl1-xOOH, the resulting material was capable of simultaneously adsorbing both F− and AsO33− because the functional groups of CS facilitated the formation of both ZrOOH and AlOOH nanoparticles. Interestingly, ZrxAl1-xOOH and CS@ ZrxAl1-xOOH had better F− adsorption capacities at pH 9. The Langmuir maximum adsorption capacity of CS@ZrxAl1-xOOH was 0.655 and 0.983 mmol g−1 for AsO33− and F−, respectively and the performance was superior to that of previously reported metallic oxide and chitosan-based sorbents. In addition, the presence of coexisting anions revealed that the CS@ZrxAl1-xOOH material selectively removed AsO33− over F− in a binary batch system. The adsorption kinetics of the adsorbents were well fit to the pseudo-second-order model. Due to the simultaneous and quick uptake capacity and cost-effectiveness, CS@ZrxAl1-xOOH nanocomposite have potential application in environmental cleanup.