Effects of molar ratio and calcination temperature on the adsorption performance of Zn/Al layered double hydroxide nanoparticles in the removal of pharmaceutical pollutants

Elhalil, A.; Farnane, M.; Machrouhi, A.; Mahjoubi, F.Z.; Elmoubarki, R.; Tounsadi, Hanane; Abdennouri, Mohamed; Barka, Noureddine

doi:10.1016/j.jsamd.2018.03.005

Cited by 36 publications

(17 citation statements)

References 32 publications

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“…The XRD pattern of the powder reconstructed in a CR ethanolic solution displays only the reflections of a ZnO-phase. The peaks are extremely broad, typically for a ZnO-phase calcined under mild conditions (400 • C-500 • C) [39]. The amount of ZnO-phase reported to the layered LDH phases in PZn3Al-CR(Aq), PZn3Al-CR(Et) and RZn3Al-CR(Aq) fresh samples was estimated by considering the integrated intensities of the main single reflections of the ZnO-phase in RZn3Al-CR(Et) as reference.…”

Section: Xrd Characterization Of Cr Functionalized Zn3al-ldh Samplesmentioning

confidence: 99%

Curcumin Incorporation into Zn3Al Layered Double Hydroxides—Preparation, Characterization and Curcumin Release

et al. 2020

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Curcumin (CR) is a natural antioxidant compound extracted from Curcuma longa (turmeric). Until now, researches related to the incorporation of CR into layered double hydroxides (LDHs) were focused only on hybrid structures based on a MgxAl-LDH matrix. Our studies were extended towards the incorporation of CR in another type of LDH-matrix (Zn3Al-LDH) which could have an even more prolific effect on the antioxidant activity due to the presence of Zn. Four CR-modified Zn3Al-LDH solids were synthesized, e.g., PZn3Al-CR(Aq), PZn3Al-CR(Et), RZn3Al-CR(Aq) and RZn3Al-CR(Et) (molar ratio CR/Al = 1/10, where P and R stand for the preparation method (P = precipitation, R = reconstruction), while (Aq) and (Et) indicate the type of CR solution, aqueous or ethanolic, respectively). The samples were characterized by XRD, Attenuated Total Reflectance Fourier Transformed IR (ATR-FTIR) and diffuse reflectance (DR)-UV–Vis techniques and the CR-release was investigated in buffer solutions at different pH values (1, 2, 5, 7 and 8). XRD results indicated a layered structure for PZn3Al-CR(Aq), PZn3Al-CR(Et), RZn3Al-CR(Aq) impurified with ZnO, while RZn3Al-CR(Et) contained ZnO nano-particles as the main crystalline phase. For all samples, CR-release revealed a decreasing tendency towards the pH increase, and higher values were obtained for RZn3Al-CR(Et) and PZn3Al-CR(Et) (e.g., 45% and 25%, respectively at pH 1).

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Section: Xrd Characterization Of Cr Functionalized Zn3al-ldh Samplesmentioning

confidence: 99%

Curcumin Incorporation into Zn3Al Layered Double Hydroxides—Preparation, Characterization and Curcumin Release

et al. 2020

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“…The obtained electrode exhibited a LOD of 0.041 μM and good recovery values in pharmaceutical samples and herring sperm DNA. Layered double hydroxides (LDHs) are other promising materials to fabricate electrochemical sensors due to their special physical and chemical properties such as high adsorption capacity, low cost, tunable composition, catalytic activity and high chemical stability [ 74 ]. The positively charged LDH layers offer an opportunity for the intercalation of numerous molecules to construct a sensor with better selectivity.…”

Section: Non-carbon Nanomaterials Modified Electrodesmentioning

confidence: 99%

Chemically modified carbon-based electrodes for the determination of paracetamol in drugs and biological samples

Boumya

Taoufik

Achak

et al. 2021

Journal of Pharmaceutical Analysis

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Paracetamol is a non-steroidal, anti-inflammatory drug widely used in pharmaceutical applications for its sturdy, antipyretic and analgesic action. However, an overdose of paracetamol can cause fulminant hepatic necrosis and other toxic effects. Thus, the development of advantageous analytical tools to detect and determine paracetamol is required. Due to simplicity, higher sensitivity and selectivity as well as costefficiency, electrochemical sensors were fully investigated in last decades. This review describes the advancements made in the development of electrochemical sensors for the paracetamol detection and quantification in pharmaceutical and biological samples. The progress made in electrochemical sensors for the selective detection of paracetamol in the last 10 years was examined, with a special focus on highly innovative features introduced by nanotechnology. As the literature is rather extensive, we tried to simplify this work by summarizing and grouping electrochemical sensors according to the by which manner their substrates were chemically modified and the analytical performances obtained.

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“…Many authors point out that calcination process has a great influence on two important properties of adsorbents, i.e., specific surface area and pore size. They found, the optimum calcination temperature for zeolite, fly ash, TiO 2 -silica composite to be in the range of 300-600 • C [51][52][53][54]. Sun et al reported that calcination has a damaging effect on the structure of raw zeolite and directly affects specific surface area, pore volume, and pore size distribution [55].…”

Section: Effect Of Filtration Timementioning

confidence: 99%

Removal of Organic Micropollutants by Grainy Bentonite-Activated Carbon Adsorbent in a Fixed Bed Column

Kamińska

2018

Water

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Organic micropollutants enter effluent streams and then flow into receiving waters. The volume adversely affects aquatic biota substantially. Therefore, many efforts have been made to develop methods for their elimination. The aim of this study was the removal of organic micropollutants with different properties from WWTP (wastewater treatment plant) effluent in fixed bed columns packed with several combinations of sand, granular activated carbon (GAC), and granular clay-carbonaceous composite. Two types of bentonite-powder activated carbon-based granules (Ben-AC) were prepared within this work, with different calcination temperature. It was found that higher calcination temperature enhanced the surface porosity and adsorption potential versus studied micropollutants due to dihydroxylation resulting in higher chemical activity. Introduction of these granules in the place of GAC in a fixed bed column enhances the removal degree of micropollutants and typical water quality parameters. For example, the reduction degree of color, phosphate, and nitrate concentrations increased from 83%, 69%, and 4% to 95%, 83%, and 24% for column I and II, respectively. The concentration of carbamazepine, octylphenol, nononylphenol, and anthracene was reduced by 75%, 83%, 72%, 99% in column I, while using column II or III their removal was: 86%, 97%, 99%, 99%, respectively. Independent of the column filling, the removal of carbamazepine was the lowest (75–86%), while the highest retention was obtained for anthracene (99%). The study of column performance in the treatment of effluent in time showed that column filled with Ben-AC-400 guaranteed high removal degree in the operating time. The batch adsorption data were better described by both the Langmuir model.

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Effects of molar ratio and calcination temperature on the adsorption performance of Zn/Al layered double hydroxide nanoparticles in the removal of pharmaceutical pollutants

Cited by 36 publications

References 32 publications

Curcumin Incorporation into Zn3Al Layered Double Hydroxides—Preparation, Characterization and Curcumin Release

Curcumin Incorporation into Zn3Al Layered Double Hydroxides—Preparation, Characterization and Curcumin Release

Chemically modified carbon-based electrodes for the determination of paracetamol in drugs and biological samples

Removal of Organic Micropollutants by Grainy Bentonite-Activated Carbon Adsorbent in a Fixed Bed Column

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