4.7 Article

Effectively removing indole-3-butyric acid from aqueous solution with magnetic layered double hydroxide-based adsorbents

Journal

JOURNAL OF HAZARDOUS MATERIALS
Volume 408, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.jhazmat.2020.124446

Keywords

Pollutant adsorption; Adsorption mechanism; Magnetic separation; Regenerate

Funding

  1. National Natural Science Foundation of China [21703125, 21777089]
  2. Taishan Scholar Project of Shandong Province [ts201712063, ts20190948]

Ask authors/readers for more resources

The magnetic layered double hydroxide-based materials (MLDHs) with the metal composition of Mg(II)Al(III) were synthesized under different conditions as an adsorbent for removing the phytohormone IBA. The study found that MLDH-1 synthesized with ammonia as the base source had the best adsorption capacity, following a spontaneous and exothermic process involving surface adsorption and interlayer anion exchange as the main pathways.
The magnetic layered double hydroxide-based materials (MLDHs) with the metal composition of Mg(II)Al(III) were synthesized by different conditions as the adsorbent for removal of a phytohormone, indole-3-butyric acid (IBA). The morphological characteristics of MLDHs were studied through various characterization methods such as XRD, SEM, TEM, FTIR, BET, Zeta-potential and VSM. The adsorption results showed that the adsorption capacity of MLDH-1 synthesized by co-precipitation method with ammonia as the base source was the best (maximum 522.6 mg/g). The extent of adsorption in the pH range of 3.0-9.0 was observed to be no noticeable change. From the economical point of view, 1.0 g/L MLDH-1 composites were selected as optimum parameter. For a given adsorbent concentration (C-s), its kinetics and adsorption isotherm followed the pseudo-second-order and Liu isotherm model, respectively. The adsorbed sample can be easily magnetically separated and regenerated with NaNO3. The adsorption process was spontaneous and exothermic, including two path stages: surface adsorption of lamellar and interlayer anion exchange. The research makes a contribution to evaluating the ability of MLDHs in IBA removal and helping the public to understand the mechanism of adsorption process.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available