Conventional purification and isolation

Bertin, Lorenzo; Frascari, Dario; Domı́nguez, Herminia; Falqué, Elena; Rodríguez, Francisco Amador Riera; Álvarez-Blanco, Silvia

doi:10.1016/b978-0-12-800351-0.00007-9

Cited by 5 publications

(3 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two alternative adsorption mechanisms can be used for PC recovery: simple adsorption on neutral nonionic resins and ion exchange on ionic resins. Both sorbent types were successfully used in several fields [25,26]. Several studies focused on the use of these sorbents for the removal of single phenolic compounds from synthetic solutions [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Batch and Continuous Flow Adsorption of Phenolic Compounds from Olive Mill Wastewater: A Comparison between Nonionic and Ion Exchange Resins

Pinelli

Bacca

Kaushik

et al. 2016

International Journal of Chemical Engineering

Self Cite

View full text Add to dashboard Cite

The goals of this work were (i) to compare two anion ion exchange resins (IRA958 Cl and IRA67) and a nonionic resin (XAD16) in terms of phenolic compounds adsorption capacity from olive mill wastewater and (ii) to compare the adsorption capacity of the best resin on columns of different length. The ion exchange resins performed worse than nonionic XAD16 in terms of resin utilization efficiency (20% versus 43%) and phenolic compounds/COD enrichment factor (1.0 versus 2.5). The addition of volatile fatty acids did not hinder phenolic compounds adsorption on either resin, suggesting a noncompetitive adsorption mechanism. A pH increase from 4.9 to 7.2 did not affect the result of this comparison. For the best performing resin (XAD16), an increase in column length from 0.5 to 1.8 m determined an increase in resin utilization efficiency (from 12% to 43%), resin productivity (from 3.4 to 7.6 g sorbed phenolics /kg resin ), and phenolics/COD enrichment factor (from 1.2 to 2.5). An axial dispersion model with nonequilibrium adsorption accurately interpreted the phenolic compounds and COD experimental curves.

show abstract

Section: Introductionmentioning

confidence: 99%

Batch and Continuous Flow Adsorption of Phenolic Compounds from Olive Mill Wastewater: A Comparison between Nonionic and Ion Exchange Resins

Pinelli

Bacca

Kaushik

et al. 2016

International Journal of Chemical Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Adsorption and ion exchange were successfully studied and implemented for PC recovery from OMW . They are characterized by a simple design and operation, low operating costs and ease of resin regeneration . However, the high concentration of carbohydrates and proteins in OMW can lead to a desorbed product characterized by a low PC content .…”

Section: Introductionmentioning

confidence: 99%

“…A limited number of studies focused on the continuous‐flow adsorption or ion exchange of PC mixtures . Only a few of these studies were based on the use of an actual OMW, whereas numerous studies used synthetic PC mixtures or other PC‐rich wastewaters or natural sources, such as apples, blueberries, grape marcs and artichokes . The studies on PC adsorption from PC‐rich wastewaters and matrixes did not include life‐cycle assessment (LCA) and cost–benefit analysis (CBA) of the process.…”

Section: Introductionmentioning

confidence: 99%

Continuous flow adsorption of phenolic compounds from olive mill wastewater with resin XAD16N: life cycle assessment, cost–benefit analysis and process optimization

Frascari

Bacca

Wardenaar

et al. 2019

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

BACKGROUND Olive mill wastewaters (OMWs) represent a major environmental concern due to their high organic load and phytotoxic activity. The selective recovery of phenolic compounds (PCs) from OMW is promising, thanks to the antioxidant and antimicrobial properties of PCs. The goal of this work was to perform a life cycle assessment (LCA) and cost–benefit analysis (CBA) of a full‐scale process of PC adsorption/desorption on resin Amberlite XAD16N. The industrial process was designed on the basis of laboratory tests aimed at performing a preliminary process optimization. RESULTS Adsorption tests were conducted at different velocities in a 1.8‐m column packed with XAD16N. The optimal superficial velocity and retention time (2.78 m h–1 and 0.56 h) allowed the attainment of satisfactory performances in terms of resin operating capacity (0.46), PC adsorption yield (0.92), PC mass fraction in the sorbed product (0.50 gPC/gVS) and specific antioxidant activity (3–6 gascorbic acid/gPC). Six consecutive adsorption/desorption cycles, operated with the same resin load, resulted in stable process performances. The LCA indicated that the environmental impact of the process could be decreased markedly through the addition of an anaerobic digestion step for the production of irrigation‐quality water and fertilizers from the dephenolized OMW. The PC market price required for the generation of a positive business case resulted relatively low (€1.7–13.5 kgPC–1). CONCLUSION The results indicate that the proposed PC adsorption/desorption technology, if integrated with an anaerobic digestion step, represents a promising solution for the treatment and valorization of OMW, a major agro‐industrial waste in Mediterranean countries. © 2019 Society of Chemical Industry

show abstract