Removal of phosphate from industrial wastewater using uncalcined MgAl-NO3 layered double hydroxide: batch study and modeling

Khitous, Mohamed; Salem, Zineb; Halliche, D.

doi:10.1080/19443994.2015.1077745

Cited by 72 publications

(20 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strong absorption peak at approximately 1347 cm –1 is due to the nitrate group stretching frequency of NO 3 – . Absorption below 1000 cm –1 is due to the metal–oxygen vibrations of LDHs within the hydroxide layers …”

Section: Resultssupporting

confidence: 92%

“…Absorption below 1000 cm −1 is due to the metal−oxygen vibrations of LDHs within the hydroxide layers. 52 Furthermore, a blueshift in the FTIR spectra of the lactone ring of pure AA and AA-LDHs (both coprecipitation method and manual grinding method) suggests that interaction of the LDHs leads to changes in electron density around the functional groups. The corresponding absorption values shifted from 1259 cm −1 (pure AA) to 1323 cm −1 (mechanochemically ground AA-LDHs), and the lactone ring in AA shows a shift to slightly higher wavenumbers in the AA-LDHs (Figure 3(B)), which is due to the weakening of intramolecular H bonds in AA upon intercalation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Facile Mechanochemical Approach To Synthesizing Edible Food Preservation Coatings Based On Alginate/Ascorbic Acid-Layered Double Hydroxide Bio-Nanohybrids

Madhusha

Munaweera

Karunaratne

et al. 2020

J. Agric. Food Chem.

View full text Add to dashboard Cite

A bionanohybrid based on ascorbic acid-intercalated layered double hydroxides (LDHs) was synthesized using a facile and novel mechanochemical grinding technique, and its efficacy as an edible food coating is reported. Ascorbic acidintercalated Mg-Al-LDHs (AA-LDHs) are synthesized using a green water-assisted grinding approach. The successful synthesis of the mechanochemically ground AA-LDHs was confirmed by the shifts observed in the basal peaks of the LDHs based on a powder X-ray diffraction, changes in the positions of vibrational frequencies of ascorbic acid based on Fourier Transform Infrared Spectroscopy, and significant changes in the intensity and peak positions of the core−shell bands based on X-ray photoelectron spectroscopy. The resulting nanohybrid further demonstrates thermal stability in thermogravimetric and derivative thermogravimetric analysis. Transmission electron microscopy images of the mechanochemically synthesized AA-LDHs reveal a plate-like morphology, which is a characteristic of the hydrotalcite-like structure. In a novel application, an edible coating was prepared by blending the AA-LDHs into a biocompatible alginate matrix, and the coating was developed on freshly plucked strawberries using the dip-coating method. In order to evaluate the efficacy of the coating, the total phenolic content, pH, microbial growth, weight loss, titratable acidity, and ascorbic acid content were monitored in the coated and uncoated fruits for a period of 18 days. The results reveal that the shelf life of strawberries increases from 9 days to 15 days for the nanohybrid coated fruits, suggesting the potential food preservation applications of the nanohybrid.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Facile Mechanochemical Approach To Synthesizing Edible Food Preservation Coatings Based On Alginate/Ascorbic Acid-Layered Double Hydroxide Bio-Nanohybrids

Madhusha

Munaweera

Karunaratne

et al. 2020

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…This parameter is slightly higher in natural hydrotalcite: 60 mgP/g [13]. The same level of phosphorus recovery was reported for nitrate ions intercalating into the Mg-Al LDH structure to convert it into an anion exchanger [17]. A similar value was obtained when a synthetic biological fluid (urine) was dephosphorized using LDH [18].…”

Section: Resultssupporting

confidence: 75%

Layered Double Mg–Al Hydroxides to Dephosphate Municipal Effluents

Gorbacheva

Mayorov

Fokina

2021

Inorg. Mater. Appl. Res.

View full text Add to dashboard Cite

The phosphate recovery process is simulated to explore the potential of phosphate recovery from model solutions and from a sludge mixture in the regional sewage treatment plants. Layered Mg-Al double hydroxides (LDH) obtained through a solid-phase synthesis according to a proprietary process are used as sorbents. Experimental results on ion sorption on Mg-Al LDH can be described using a pseudo-first order kinetic model. The process of phosphate ion sorption by hydroxide form of Mg-Al LDH occurs in a mixed-diffusion mode. The sorption takes place not only on the outer surface of the particles of the material but also on the internal surface due to porosity. The sorption capacity for the hydroxide form is about 49 mg P/g, which is consistent with the average level of phosphorus recovery from wastewater achieved in synthesized analogs. The use of the oxide form obtained through calcining material at 600°C increases the efficiency of the process to dephosphotate municipal effluents.

show abstract

“…In the adsorption solution, the release of ash, Ca 2+ , Na + , and other substances on the surface of the biochar increased the solution pH (the pH values of the CR, MO, TP, and Cr(VI) solution were 6.75, 7.05, 6.88, and 6.95, respectively). At pH > pH ZPC , the surface of the material was negatively charged, − which is the opposite of positively charged. Figure b shows the XRD pattern of ZnAl-LDO@BB.…”

Section: Results and Discussionmentioning

confidence: 99%

Green Removal of Various Pollutants by Microsphere Adsorption: Material Characterization and Adsorption Behavior

Deng

et al. 2020

Energy Fuels

View full text Add to dashboard Cite

Layered double-oxide/biochar composites (ZnAl-LDO@BB) were successfully prepared by a hydrothermal method and are used to adsorb different pollutants. High-resolution transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy were used to characterize the ZnAl-LDO@BB. The synthesized ZnAl-LDO@BB were regular microspheres, and ZnAl nanosheets were regularly embedded on the surface of the banana biochar. The adsorption properties of ZnAl-LDO@BB for four adsorbates in aqueous solution were evaluated by batch adsorption experiments. The results showed that ZnAl-LDO@BB can quickly and effectively adsorb Congo red (CR), methyl orange (MO), total phosphorus (TP), and hexavalent chromium [Cr(VI)]. Adsorption conformed to the Langmuir model and pseudo-second-order (PSO) kinetic equation, and the adsorbed amounts of CR, MO, TP, and Cr(VI) calculated by the Langmuir model were 344.83, 588.24, 322.58, and 64.52 mg/g, respectively. The mechanism of the adsorbate removal by ZnAl-LDO@BB involves surface functional group complexation, pore adsorption, and interlayer channel adsorption. Based on these results, ZnAl-LDO@BB is a multifunctional green material for water treatment and has good application prospects.

show abstract

Removal of phosphate from industrial wastewater using uncalcined MgAl-NO3 layered double hydroxide: batch study and modeling

Cited by 72 publications

References 55 publications

Facile Mechanochemical Approach To Synthesizing Edible Food Preservation Coatings Based On Alginate/Ascorbic Acid-Layered Double Hydroxide Bio-Nanohybrids

Facile Mechanochemical Approach To Synthesizing Edible Food Preservation Coatings Based On Alginate/Ascorbic Acid-Layered Double Hydroxide Bio-Nanohybrids

Layered Double Mg–Al Hydroxides to Dephosphate Municipal Effluents

Green Removal of Various Pollutants by Microsphere Adsorption: Material Characterization and Adsorption Behavior

Contact Info

Product

Resources

About