Alginate encapsulated pillared clays: removal of a neutral/anionic biocide (pentachlorophenol) and a cationic dye (safranine) from aqueous solutions

Lezehari, Mouloud; Basly, Jean‐Philippe; Baudu, Michel; Bouras, Omar

doi:10.1016/j.colsurfa.2010.05.021

Cited by 64 publications

(21 citation statements)

References 41 publications

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“…3). No significant differences in hydroxyl (-OH) stretching bands at approximately 3305 cm −1 were observed (Lezehari et al 2010). Peaks at 1590, 1404, and 1023 cm −1 in pure alginate represent the stretching of COO − (symmetric), COO (asymmetric), and C-O-C, respectively (Ghadiri et al 2013;Lakouraj et al 2014).…”

Section: Resultsmentioning

confidence: 91%

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

et al. 2018

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In this work, the preparation, characterization, and sorption of rhodamine 6G and humic acids on a composite sodium alginate-bentonite were investigated. Their structure and morphology were analyzed by several techniques, including Fourier transform infrared spectroscopy, X-ray diffraction, and N 2 adsorption at − 196 °C. A synergetic sorption mechanism was observed in binary systems; humic acids adsorption was enhanced by the presence of Rh6G in the mixture. The kinetic studies revealed that the sorption follows a pseudo-first-order kinetic model and the sorption capacities of Rh6G increased with the pH value. The Langmuir isothermal model well described the adsorption isotherm data, showing a maximum adsorption capacity for Rh6G up to 429.5 mg/g at 20 °C. On the basis of the data of the present investigation, it is possible to conclude that the composite exhibited excellent affinity for the dye and humic acids, and it can be applied to treat wastewater containing dye and natural organic matter.

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Section: Resultsmentioning

confidence: 91%

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

et al. 2018

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“…In the adsorption process, one of the main factors which has a determining role on the removal of contaminants is the interactions between target compounds and the functional groups present on the adsorbent surface . Therefore, using the adsorbent with various pH conditions is a smart idea to remove both anionic and cationic dyes by means of electrostatic interactions between the dyes and the charged sites that are present on the surface of the adsorbent . Furthermore, the adsorbent with many adsorption sites and a large surface area dramatically increase dye removal efficiency in the adsorption processes.…”

Section: Introductionmentioning

confidence: 99%

Novel Cross‐linked Superfine Alginate‐Based Nanofibers: Fabrication, Characterization, and Their Use in the Adsorption of Cationic and Anionic Dyes

et al. 2016

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In this study, fabrication, characterization, and adsorption properties of alginate (Alg)-based nanofibrous membrane were investigated for two categories of anionic (AR14) and cationic (BB41) dyes. Three optimization steps were performed to achieve the membrane enjoying desirable morphology, highest Alg content, and lowest possible nanofiber diameter. Consequently, Alg/poly(ethylene oxide) nanofibers with the 80:20 ratio and mean diameter of 93 nm were produced. A novel method was applied as spraying the cross-linking solution to diminish the solubility of the nanofibers in aqueous environments. The effect of solution pH, contact time, membrane dosage, and dye concentration on the adsorption performance was evaluated. The results showed that the produced membrane has an obvious pH dependency in which the maximum adsorption capacity at the solution pH of 1 and 9 were 93% and 71% for AR14 and BB41, respectively. The present work revealed that the Alg-based nanofibrous membranes have a great potential to remove both anionic and cationic dyes from aqueous solutions. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2016, , 21569; View this article online at wileyonlinelibrary.com.

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“…The adsorption affinity of bentonite can be increased by modifying it with an intercalating agent (i.e., surfactant). The affinity enhancement enables bentonite to be employed for a wider variety of pollutants [8]. In order to avoid environmental problems that might arise from the use of synthetic surfactants, the use of an environmentally friendly (natural) surfactant is more desirable [9].…”

Section: Introductionmentioning

confidence: 99%

Renewable rarasaponin-bentonite-alginate composite with sponge-like structure and its application for crystal violet removal from aqueous solution

Laysandra¹,

Kurniawan²,

Fabryanty³

et al. 2019

Desalination and Water Treatment

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Adsorption is an efficient process for removing contaminants from water by using adsorbent. In this work, bentonite, rarasaponin, and sodium alginate are used as raw materials to prepare new composite to be applied to the adsorption of crystal violet dye. The prepared adsorbent (bentonite-rarasaponin-alginate composite) has a sponge-like appearance. The Fourier transform infrared (FTIR), X-ray diffraction (XRD), nitrogen (N 2) sorption and scanning electron microscopy (SEM) methods were employed to characterize the prepared adsorbents. The adsorption experiments were conducted isothermally at 30,50, and 70°C. The Freundlich and Langmuir isotherm models were chosen to correlate the equilibrium adsorption data. Meanwhile, the adsorption kinetics was studied at 30°C, and the data were correlated by using the pseudo-first-order and pseudo-second-order. Based on the adsorption results, it was found that composite can adsorb crystal violet dye 3 times more than bentonite at all investigated temperatures, where at 70°C the adsorption capacity for acid-activated bentonite is 176.63 mg/g and for rarasaponin-bentonite-alginate composite is 476.04 mg/g. The adsorption of crystal violet dye onto the adsorbents increases with increasing temperature indicating that the chemisorption is dominant in this process.

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Alginate encapsulated pillared clays: removal of a neutral/anionic biocide (pentachlorophenol) and a cationic dye (safranine) from aqueous solutions

Cited by 64 publications

References 41 publications

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

Novel Cross‐linked Superfine Alginate‐Based Nanofibers: Fabrication, Characterization, and Their Use in the Adsorption of Cationic and Anionic Dyes

Renewable rarasaponin-bentonite-alginate composite with sponge-like structure and its application for crystal violet removal from aqueous solution

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