Quaternized hydroxyethyl cellulose ethoxylate and membrane separation techniques for arsenic removal

Sánchez, Julio; Butter, Bryan; Chavez, Soledad; Riffo, Lina; Basáez, Luís; Rivas, Bernabé L.

doi:10.1080/19443994.2016.1150889

Cited by 17 publications

(7 citation statements)

References 20 publications

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“…The critical flux was 1.8 -2.0 times higher for the modified membrane compared to the unmodified one. Julio Sanchez et al [92] studied the removal of As (V) through quaternized hydroxyethyl cellulose ethoxylate (QHECE), through polymer-enhanced ultrafiltration. The authors electrochemically oxidized As (III) to As (V), using polymer (QHECE) as a support electrolyte, later the solution was taken to an ultrafiltration cell, 90% retention of As (V) was obtained, with 100 mg of (QHECE) and 30 mg L-1 of metal at pH 9.0 vs 0% retention of As (III) under the same conditions, maximum retention capacity of 56 mg As / g of polymer.…”

Section: Removal Of Metal Ions By Cellulose and Carboxymethyl Cellulosementioning

confidence: 99%

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Biopolymers Applied to Remove Metal Ions Through Ultrafiltration. A Review

Sánchez

Butter

Rivas³

2020

J. Chil. Chem. Soc.

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This manuscript is an overview of the versatile biopolymer materials alginic acid, carboxymethyl cellulose, and quaternized chitosan which contain different functional groups to remove hazardous inorganic species. These bioadsorbents are completely water-soluble and have a high versatility to achieve a higher sorption capacity and efficiency under different experimental conditions in combination with ultrafiltration membranes through the liquid-phase polymer-based retention (LPR) technique. In general, thesebioadsorbents are friendly with the environment and have a higher biodegradability compared with those more employed synthetic polymers.

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Section: Removal Of Metal Ions By Cellulose and Carboxymethyl Cellulosementioning

confidence: 99%

“…Alginic acid [107] Sodiumalginate [107] Cellulose [107] Carboxymethyl cellulose [107] Chitosan [107] Chitin [107] Quaternized Chitosan [92,109]…”

Section: Polymer Possible Interaction Mechanism Refmentioning

confidence: 99%

Biopolymers Applied to Remove Metal Ions Through Ultrafiltration. A Review

Sánchez

Butter

Rivas³

2020

J. Chil. Chem. Soc.

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“…MB adsorption was conducted via the washing method, and the solution was filtered to separate the SA-MB aggregate by PEUF. The adsorption removal R (%) was calculated via Equation 1 22 :…”

Section: Peuf and Mb Adsorption Studiesmentioning

confidence: 99%

“…where C 0 and C e (mg L −1 ) are the initial and equilibrium concentrations, respectively, of MB in the solution. The amount of MB that was absorbed at equilibrium, namely, q e (mg g −1 ), was determined in terms of the amount of MB (mg) that was absorbed in the SA (g) and was calculated via Equation 2 22 :…”

Section: Peuf and Mb Adsorption Studiesmentioning

confidence: 99%

“…16,19,20 The PEUF technique consists of the interaction of a functional water-soluble polymer (WSP) with low molecular weight species (e.g., heavy metals and dissolved organic compounds). 16,[21][22][23][24][25] For use in PEUF, a WSP must satisfy three general requirements: high content of functional groups that can interact with the contaminating species (such as amino, carboxylic and sulfonic acid groups), sufficient solubility in aqueous solutions and a higher molecular weight than the molecular weight cut-off (MWCO) of the ultrafiltration membranes. 18,26,27 The chemical species to be removed interact with functional groups of WSP to form a supramacromolecular aggregate, which is retained by the ultrafiltration membrane.…”

Section: Introductionmentioning

confidence: 99%

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Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

Oyarce

Santander

Butter

et al. 2021

J of Applied Polymer Sci

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In this study, the removal of methylene blue (MB) cationic dye from an aqueous solution was investigated using the polymer-enhanced ultrafiltration (PEUF) technique with sodium alginate (SA) as an extracting soluble polymer, in combination with an ultrafiltration membrane of regenerated cellulose with a 10 kDa molar mass cut-off. SA was characterized via Fourier-transform infrared spectroscopy and thermogravimetric analysis. For ultrafiltration studies, the washing method was used to evaluate various experimental variables, such as the pH, SA dose and initial MB concentration, and adsorption isotherms to identify the optimal adsorption conditions. Finally, the regeneration of the SA polymer was evaluated in five consecutive cycles of adsorption-desorption of MB. In the obtained characterization results, the structural composition of SA and the characteristic thermal stability of the polymer were verified. The PEUF results demonstrated that a retention capacity of 98% of the MB was realized at pH 8.0 using 0.025 g of SA at an initial optimal MB concentration of 50 mg L −1 . It is possible to observe that the Freundlich model better explain the interaction between the dye and the polymer surface. According to the results is demonstrated the regeneration capacity of the polymer and its subsequent reuse.

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