title: Reversible switch between bulk MgCO3·3H2O and Mg(OH)2 micro/nanorods induces continuous selective preconcentration of anionic dyes.
abstract: It is still a big challenge to treat large amount of water with low concentration of pollutant. In this study, a hierarchical (micro/nano) structured Mg(OH)2 adsorbent was introduced by the in situ hydration of porous MgO in the dye solution. The adsorbent showed high selective adsorption capacity (Q0 ≈ 155 mg/g for acid alizarine blue) and fast adsorption rate for the removal of anionic dyes down to the mg/L levels. Moreover, the adsorbed dye was successfully desorbed by carbonation, resulting in a ~4000 fold enrichment of the dye solution. It was demonstrated that by establishing a reversible switch between the Mg(OH)2 micro/nanorod and the bulk MgCO3·3H2O, a continuous preconcentration of low-concentration dye wastewater could be achieved.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors.forename: Yongjing
authors.initials: Y
authors.lastname: Wang
authors.forename: Jingping
authors.initials: J
authors.lastname: Chen
authors.forename: Lili
authors.initials: L
authors.lastname: Lu
authors.forename: Zhang
authors.initials: Z
authors.lastname: Lin
mesh_terms: D000838:Anions / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry; D006801:Humans; D007477:Ions; D008274:Magnesium / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D012996:Solutions; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D000838:Anions; D004396:Coloring Agents; D007477:Ions; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; C005479:magnesium carbonate; D008274:Magnesium