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Sequential use of bentonites and solar photocatalysis to treat winery wastewater.
J Agric Food Chem. 2008 Dec 24; 56(24):11956-61.JA

Abstract

The sequential use of low-cost adsorbent bentonites and solar photocatalysis to treat winery wastewater has been studied. Three commercial sodium-bentonites (MB-M, MB-G, and MB-P) and one calcium-bentonite (Bengel) were characterized and used in this study. These clay materials were useful to totally remove turbidity (90-100%) and, to a lesser extent, color, polyphenols (PPh), and soluble chemical oxygen demand (CODS) from winery wastewater. Both surface area and cation exchange capacity (CEC) of bentonite had a positive impact on treatment efficiency. The effect of pH on turbidity removal by bentonites was studied in the 3.5-12 pH range. The bentonites were capable of greatly removing turbidity from winery wastewater at pH 3.5-5.5, but removal efficiency decreased with pH increase beyond this range. Settling characteristics (i.e., sludge volume index (SVI) and settling rate) of bentonites were also studied. Best settling properties were observed for bentonite doses around 0.5 g/L. The reuse of bentonite for winery wastewater treatment was found not to be advisable as the turbidity and PPh removal efficiencies decreased with successive uses. The resulting wastewater after bentonite treatment was exposed to solar radiation at oxic conditions in the presence of Fe(III) and Fe(III)/H2O2 catalysts. Significant reductions of COD, total organic carbon (TOC), and PPh were achieved by these solar photocatalytic processes.

Authors+Show Affiliations

Departamento de Ingeniería Química y Química Física, Universidad de Extremadura, 06071 Badajoz, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19035643

Citation

Rodríguez, Eva, et al. "Sequential Use of Bentonites and Solar Photocatalysis to Treat Winery Wastewater." Journal of Agricultural and Food Chemistry, vol. 56, no. 24, 2008, pp. 11956-61.
Rodríguez E, Márquez G, Carpintero JC, et al. Sequential use of bentonites and solar photocatalysis to treat winery wastewater. J Agric Food Chem. 2008;56(24):11956-61.
Rodríguez, E., Márquez, G., Carpintero, J. C., Beltrán, F. J., & Alvarez, P. (2008). Sequential use of bentonites and solar photocatalysis to treat winery wastewater. Journal of Agricultural and Food Chemistry, 56(24), 11956-61. https://doi.org/10.1021/jf802502v
Rodríguez E, et al. Sequential Use of Bentonites and Solar Photocatalysis to Treat Winery Wastewater. J Agric Food Chem. 2008 Dec 24;56(24):11956-61. PubMed PMID: 19035643.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sequential use of bentonites and solar photocatalysis to treat winery wastewater. AU - Rodríguez,Eva, AU - Márquez,Gracia, AU - Carpintero,Juan Carlos, AU - Beltrán,Fernando J, AU - Alvarez,Pedro, PY - 2008/11/28/pubmed PY - 2009/1/27/medline PY - 2008/11/28/entrez SP - 11956 EP - 61 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 56 IS - 24 N2 - The sequential use of low-cost adsorbent bentonites and solar photocatalysis to treat winery wastewater has been studied. Three commercial sodium-bentonites (MB-M, MB-G, and MB-P) and one calcium-bentonite (Bengel) were characterized and used in this study. These clay materials were useful to totally remove turbidity (90-100%) and, to a lesser extent, color, polyphenols (PPh), and soluble chemical oxygen demand (CODS) from winery wastewater. Both surface area and cation exchange capacity (CEC) of bentonite had a positive impact on treatment efficiency. The effect of pH on turbidity removal by bentonites was studied in the 3.5-12 pH range. The bentonites were capable of greatly removing turbidity from winery wastewater at pH 3.5-5.5, but removal efficiency decreased with pH increase beyond this range. Settling characteristics (i.e., sludge volume index (SVI) and settling rate) of bentonites were also studied. Best settling properties were observed for bentonite doses around 0.5 g/L. The reuse of bentonite for winery wastewater treatment was found not to be advisable as the turbidity and PPh removal efficiencies decreased with successive uses. The resulting wastewater after bentonite treatment was exposed to solar radiation at oxic conditions in the presence of Fe(III) and Fe(III)/H2O2 catalysts. Significant reductions of COD, total organic carbon (TOC), and PPh were achieved by these solar photocatalytic processes. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/19035643/Sequential_use_of_bentonites_and_solar_photocatalysis_to_treat_winery_wastewater_ L2 - https://doi.org/10.1021/jf802502v DB - PRIME DP - Unbound Medicine ER -