Recovery of proteins and other biological compounds from food processing wastewaters using fibrous materials and polyelectrolytes

Chen, Li Ang; Carbonell, Ruben G.; Serad, George A.

doi:10.1016/s0043-1354(99)00152-9

Cited by 17 publications

(19 citation statements)

References 13 publications

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“…The polyelectrolytes have found uses in a wide number of technical applications. These include ultrafiltration, [1][2][3] paper-making, wastewater treatment, [4][5][6] food industry, [7][8][9] biomaterials, [10][11][12][13][14][15][16] fuel cells [17][18][19][20][21][22][23] and nanotechnology, [24][25][26][27] just to mention a few. In all these application, the ionic groups or the ionic exchange process of polyelectrolytes is very important.…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolytes with sulfonic acid groups useful in the synthesis and stabilization of Au and Ag nanoparticles

Herrera‐González

Caldera‐Villalobos

Garcı́a-Serrano

et al. 2016

Designed Monomers and Polymers

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Two novel polyelectrolytes were obtained by chemical modification of poly(4-acryloyloxybenzaldehyde) using o-and p-aminophenylsulfonic acid, the characterization shows a chemical modification of 24.38 and 63.33%, respectively. The study shows that the polyelectrolyte with sulfonic acid in para position reduces metal ions more rapidly than polyelectrolyte in ortho position. The obtained nanoparticles of Au and Ag were characterized by ultraviolet-visible absorption spectroscopy (UV-vis) and transmission electron microscopy. The results showed that these ionic polymers are not only capable of reducing gold and silver ions, but also can stabilize the nanoparticles in the colloidal solutions. With these polymers, the process of metallic ions reduction is very slow and they lead to the production of Au and Ag nanoparticles with quasi-spherical shapes which are stable in colloidal solutions for several months. The advantage of the method used here is that the reduction can be realized in water at room temperature.

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Section: Introductionmentioning

confidence: 99%

Polyelectrolytes with sulfonic acid groups useful in the synthesis and stabilization of Au and Ag nanoparticles

Herrera‐González

Caldera‐Villalobos

Garcı́a-Serrano

et al. 2016

Designed Monomers and Polymers

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“…FOG adsorbed on the aggregates make them less dense, and not recoverable by centrifugation. 11 An advantage of using CTF is that the amount of salt necessary to promote adsorption of the proteins onto the ®brets is lower than the one required for precipitating the protein out of solution. From the literature, it has been reported that salting out of albumin in classical fractionation methods required 80% ammonium sulfate saturation (about 3.5 mol dm À3 ) 21 at physiological pH.…”

Section: Protein Recovery In the Presence Of Salts ± ®Ltration In Thementioning

confidence: 99%

“…Under microscopic observations, CTF showed a highly ®brillated structure (Fig 1(b)), whereas CTFi showed no such feature. 11 In a previous study, adsorption isotherms of BSA on the ®brets have been measured and ®tted to a Langmuir type curve. Monolayer coverage was observed.…”

Section: Desorptionmentioning

confidence: 99%

“…9 We are studying an alternative process that uses cellulosic ®brous materials for the treatment of wastewaters and for the recovery of biological compounds from these wastewaters. 10,11 The ®bers can be spun into a highly ®brillated structure with micron-sized dimensions and a very high surface area. In addition, charged groups or hydrophobic moieties can be added to the cellulose backbone by chemical modi®cations during manufacturing.…”

Section: Introductionmentioning

confidence: 99%

“…The lengths of the ®bers range from 20 to 200 mm, and the widths from 0.5 to 5 mm, in the case of CAF, 18 and from 100 to 600 mm length and from 5 to 60 mm width, in the case of CTF. 11 Fibrets have the hydrophilic character of the cellulose backbone and the capacity for absorption of organic compounds due to the acetate moiety (hydrophobic character). They have a relatively high surface energy (wettable) and can disperse in water.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recovery of proteins and other biological compounds using fibrous materials: I. Adsorption by salt addition

Chen

Carbonell

Serad

1999

J. Chem. Technol. Biotechnol.

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An adsorption and ®ltration process for the recovery of proteins and other biological compounds from aqueous streams has been developed, using cellulose-based ®brous materials. Of the many cellulose derivatives studied, cellulose acetate ®brets (CAF) and cellulose triacetate ®brets (CTF) have been shown to be the most effective. In the presence of salts, they lead to protein adsorption by hydrophobic interactions. Model proteins, such as bovine serum albumin (BSA), have been recovered by incubating these solutions with CTF in the presence of ammonium sulfate, followed by ®ltration through a 20 mm pore size ®lter. The amount of salt necessary varies with the protein type, but decreases with increasing temperature and protein concentration. High protein recovery has been obtained from an actual wastewater system at low salt dosages.

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Recovery of proteins and other biological compounds using fibrous materials: II. Flocculation by polyelectrolyte addition

Chen

Carbonell

Serad

1999

J. Chem. Technol. Biotechnol.

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Polyelectrolytes have been used in wastewater treatment processes to destabilize colloidal suspensions of proteins, cells and other biological compounds, resulting in¯occulation. When a solution containing a single model protein, bovine serum albumin (BSA), is treated with a polyelectrolyte, carboxymethyl cellulose (CMC), large and strong¯ocs are formed, which are easily retained by a 20 mm pore size ®lter. However, when a mixture of proteins, cells, and fats from an actual wastewater sample is treated in the same manner, smaller and weaker¯ocs are observed. An adsorption and ®ltration process for the recovery of valuable biological compounds using cellulosebased ®brous materials has been developed. When used simultaneously with CMC, cellulose acetate and triacetate ®brets (CAF and CTF) resulted in high recovery of biomolecules from solution at very low dosages of both polyelectrolyte and ®brets. CMC interacts with biomolecules by electrostatic interactions and polymer bridging, while CTF/CAF facilitate¯oc growth by adsorption and bridging of primary particles and by entrapment of small aggregates within their highly ®brillated microstructure.

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Recovery of proteins and other biological compounds from food processing wastewaters using fibrous materials and polyelectrolytes

Cited by 17 publications

References 13 publications

Polyelectrolytes with sulfonic acid groups useful in the synthesis and stabilization of Au and Ag nanoparticles

Polyelectrolytes with sulfonic acid groups useful in the synthesis and stabilization of Au and Ag nanoparticles

Recovery of proteins and other biological compounds using fibrous materials: I. Adsorption by salt addition

Recovery of proteins and other biological compounds using fibrous materials: II. Flocculation by polyelectrolyte addition

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