As(V) removal using a magnetic layered double hydroxide composite

作者：Suvokhiaw Soontorn; Imyim Apichat; Sukpirom Nipaka^*

来源：Separation Science and Technology (Philadelphia), 2016, 51(18): 2948-2957.

DOI：10.1080/01496395.2016.1231206

• Adsorption
• arsenic removal
• layered double hydroxide
• magnetic composite
• remediation

The Mg-Fe-Zr layered double hydroxide/Fe3O4 composite was synthesized by co-precipitation of layered double hydroxide (LDH) precursors in the presence of Fe3O4 particles and its arsenic adsorption behavior was investigated. The material characterization by XRD, TEM, surface area analysis, SEM-EDX, and VSM revealed that the composite was comprised of Fe3O4 particles covered by an LDH. The As(V) adsorption capacity of the composite (188 mg/g) was achieved at pH 3. The kinetics studies and adsorption isotherms suggested a two-stepped adsorption mechanism of the monolayer adsorption inside the interlayers of LDH.

• 出版日期2016