Synthesis of Mg-Al layered double hydroxides by electrocoagulation

Marena Molano-Mendoza; Dayana Donneys-Victoria; Nilson Marriaga-Cabrales; Miguel Angel Mueses; Gianluca Li Puma; Fiderman Machuca-Martínez

doi:10.1016/j.mex.2018.07.019

Synthesis of Mg-Al layered double hydroxides by electrocoagulation

MethodsX. 2018 Aug 8:5:915-923. doi: 10.1016/j.mex.2018.07.019. eCollection 2018.

Authors

Marena Molano-Mendoza¹, Dayana Donneys-Victoria¹, Nilson Marriaga-Cabrales¹, Miguel Angel Mueses², Gianluca Li Puma³, Fiderman Machuca-Martínez¹

Affiliations

¹ Escuela de Ingeniería Química, Universidad del Valle, A.A. 25360 Cali, Colombia.
² Department of Chemical Engineering, Universidad de Cartagena, A.A. 1382, Postal 195, Cartagena, Colombia.
³ Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom.

Abstract

Recently, layered double hydroxides (LDHs) have attracted much consideration due to their versatility and easily manipulating properties and their potential applications such as anion exchangers, support of catalysts, flame retardants, biomedical drug delivery. A novel method for the in-situ preparation in situ of LDHs, using electrocoagulation (EC) processes was developed, the EC process was performed under two different conditions, at 5 mA m^-2, changing polarity of the electrodes to find out the composition that leads to LDHs generation. The final product was characterized using XRD, BET and FTIR techniques. This method presented the following advantages: (1) Simultaneously LDHs synthesis and wastewater treatment by ion removal; (2) Polarity control allows to manipulate the M²⁺/M³⁺ molar ratio, LDHs properties and its potential applications; (3) The method spent less time to carry out the synthesis and; (4) it did not need complicated solid-liquid separation processes.

Keywords: Brucite; Gibbsite; Ion removal; Mg-Al-LDH; Synthesis of Mg-Al layered double hydroxides by electrocoagulation; Waste water treatment.