Comparative Study of Ni-Zn LHS and Mg-Al LDH Adsorbents of Navy Blue and Yellow F3G Dye

Abstract

Adsorption of disperse dyes from wastewater onto Ni-Zn LHS (layered hydroxide salts) and Mg-Al LDH (layered double hydroxides) has been compared in this study. Effects of initial pH solution, contact time and initial dye concentration were investigated. The ability of the adsorbent to be reused was also studied. The results showed that acidic condition was favorable for the adsorption of each dyes onto both adsorbent. The adsorption kinetics was studied using pseudo-first-order, pseudo-second-order and Santosa’s kinetics models. The experimental data fits well with the pseudo-second order kinetic model. The equilibrium adsorption data were analyzed using Langmuir and Freundlich isotherm models. The results showed that adsorption of navy blue onto both adsorbent followed Freundlich isotherm adsorption, while yellow F3G followed Langmuir isotherm adsorption. In the application for the adsorption the wastewater containing dyes, Ni-Zn LHS has a better adsorption capacity of 52.33 mg/g than that of Mg-Al LDH that 30.54 mg/g. Calcination of the adsorbent which has already been used increased the adsorption capacity of Mg-Al LDH to 84.75 mg/g, but decreased the adsorption capacity of the Ni-Zn LHS to 42.65 mg/g.

<p>Synthesis and properties of magnetic nanotheranostics coated with polyethylene glycol/5-fluorouracil/layered double hydroxide</p>

“…The appearance of hydrogen bond related to hydroxyl layers in the nanoparticles of co-coated Mg/Al-LDH confirmed the formation of a bond between LDH and FPEG-drug nanoparticles. For example, the asymmetric and symmetric stretching mode of O-H group in Mg/Al–OH of Mg/Al–LDH at 3416 cm −1 was shifted to 3398 cm −1 76. The band at 1636 cm −1 is due to the bending vibration (H–O–H) of interlayer water molecules was shifted to 1622 cm −1 .…”

The Impact of Magnesium–Aluminum-Layered Double Hydroxide-Based Polyvinyl Alcohol Coated on Magnetite on the Preparation of Core-Shell Nanoparticles as a Drug Delivery Agent

“…This confirmed the presence of PVA in the magnetite core-shell nanoparticles. For the MLDH FTIR spectrum (Figure 3D), the O–H bending vibration band was observed at 3416 cm −1 [36,37]. It can be observed that this band was shifted to 3398 cm −1 due to the formation of a bond between LDH and FPVA–drug nanoparticles.…”

“…The second weight loss was representative of the loss of the chain of the iron atom [44]. The major decomposition at 282 °C that corresponds to 7.7% weight loss is due to the thermal decomposition of nitrate ions of the MLDH nanocarrier [36]. The weight loss between 500–800 °C involved the removal of interlayer anion decomposition and the collapse of the layered structure.…”

Synthesis of Cellulose Acetate-Polystyrene Membrane Composites from Pineapple Peel Wastes for Methylene Blue Removal

“…To decrease the environment pollutant in water containing dyes, there are some attempt such as electro-decolorization process (Amal, Febiyanto, Soleh, & Afif, 2016;Khosravi, Fazlzadehdavil, Barikbin, & Hossini, 2015), photocatalysis reaction (Febiyanto, Eliani, Riapanitra, & Sulaeman, 2016;Febiyanto et al, 2019), adsorption (Ikhsani, Santosa, & Rusdiarso, 2016;Subramani & Thinakaran, 2017), separation…”