Clay filter-aid in ultrafiltration (UF) of humic acid solution

M. Pontié; A. Thekkedath; K. Kecili; H. Dach; F. De Nardi; J.B. Castaing

doi:10.1016/j.desal.2012.02.011

Clay filter-aid in ultrafiltration (UF) of humic acid solution

M. Pontié, A. Thekkedath, K. Kecili, H. Dach, F. De Nardi, J.B. Castaing

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Abstract

Fouling studies with three different molecular weight cut-off (MWCO) (100. kDa, 30. kDa and 10. kDa) membranes in regenerated cellulose were carried out in the presence of Acros humic acids (HA) at pH 3.0, 6.7 and 9.5. It was shown that the tighter membranes were less fouled compared with the higher MWCO membranes. 100. kDa membrane showed the highest degree of fouling. The role of pH showed that the highest degree of fouling happened at a neutral pH (pH 6.7) and the lowest degree of fouling happened at a basic pH (pH 9.5).Effectiveness of a novel pre-treatment method was applied to the 100kDa membrane. We added in the HA solution clay particles, homemade synthetized from natural bentonite and denoted Mont-CTAB. We observed a gain in productivity of 25%. 2D-fractal dimension parameter decreased under 1.5, showing a de-organization of the cake due to clay particles in/on the cake and a specific resistance of 4.4×10 11m/kg was obtained in presence of clays versus 3.6×10 14m/kg with HA alone. Finally the development of clay assisted ultrafiltration process changes the cake morphology limiting fouling impact and it is hope that for long term experiments, formation of a gel-layer should be limited. © 2012 Elsevier B.V..

Original language	English (US)
Pages (from-to)	73-86
Number of pages	14
Journal	Desalination
Volume	292
DOIs	https://doi.org/10.1016/j.desal.2012.02.011
State	Published - Apr 2012
Externally published	Yes

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@article{48d05d67001543429506e77ac9bbc35f,

title = "Clay filter-aid in ultrafiltration (UF) of humic acid solution",

abstract = "Fouling studies with three different molecular weight cut-off (MWCO) (100. kDa, 30. kDa and 10. kDa) membranes in regenerated cellulose were carried out in the presence of Acros humic acids (HA) at pH 3.0, 6.7 and 9.5. It was shown that the tighter membranes were less fouled compared with the higher MWCO membranes. 100. kDa membrane showed the highest degree of fouling. The role of pH showed that the highest degree of fouling happened at a neutral pH (pH 6.7) and the lowest degree of fouling happened at a basic pH (pH 9.5).Effectiveness of a novel pre-treatment method was applied to the 100kDa membrane. We added in the HA solution clay particles, homemade synthetized from natural bentonite and denoted Mont-CTAB. We observed a gain in productivity of 25%. 2D-fractal dimension parameter decreased under 1.5, showing a de-organization of the cake due to clay particles in/on the cake and a specific resistance of 4.4×10 11m/kg was obtained in presence of clays versus 3.6×10 14m/kg with HA alone. Finally the development of clay assisted ultrafiltration process changes the cake morphology limiting fouling impact and it is hope that for long term experiments, formation of a gel-layer should be limited. {\textcopyright} 2012 Elsevier B.V..",

author = "M. Ponti{\'e} and A. Thekkedath and K. Kecili and H. Dach and {De Nardi}, F. and J.B. Castaing",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Lots of thanks to Romain MALLET (SCIAM, Angers University, France) for the SEM analysis. Thank you also to MM W. Naceur and N. Houari for Mont-CTAB synthesis in Blida University (Algeria), T. Breton for the XRD analysis in Angers university (France) and the Middle East Desalination Research Center (MEDRC) for funds attributed to the project no. 06As003 entitled “Novel seawater pre-treatment processes by sorption onto chemically modified bentonite coupled with UF operation in RO plants”. A special thank to Nourredine Ghaffour (KAUST, Saudi Arabia). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2012",

month = apr,

doi = "10.1016/j.desal.2012.02.011",

language = "English (US)",

volume = "292",

pages = "73--86",

journal = "Desalination",

issn = "0011-9164",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Clay filter-aid in ultrafiltration (UF) of humic acid solution

AU - Pontié, M.

AU - Thekkedath, A.

AU - Kecili, K.

AU - Dach, H.

AU - De Nardi, F.

AU - Castaing, J.B.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Lots of thanks to Romain MALLET (SCIAM, Angers University, France) for the SEM analysis. Thank you also to MM W. Naceur and N. Houari for Mont-CTAB synthesis in Blida University (Algeria), T. Breton for the XRD analysis in Angers university (France) and the Middle East Desalination Research Center (MEDRC) for funds attributed to the project no. 06As003 entitled “Novel seawater pre-treatment processes by sorption onto chemically modified bentonite coupled with UF operation in RO plants”. A special thank to Nourredine Ghaffour (KAUST, Saudi Arabia). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2012/4

Y1 - 2012/4

N2 - Fouling studies with three different molecular weight cut-off (MWCO) (100. kDa, 30. kDa and 10. kDa) membranes in regenerated cellulose were carried out in the presence of Acros humic acids (HA) at pH 3.0, 6.7 and 9.5. It was shown that the tighter membranes were less fouled compared with the higher MWCO membranes. 100. kDa membrane showed the highest degree of fouling. The role of pH showed that the highest degree of fouling happened at a neutral pH (pH 6.7) and the lowest degree of fouling happened at a basic pH (pH 9.5).Effectiveness of a novel pre-treatment method was applied to the 100kDa membrane. We added in the HA solution clay particles, homemade synthetized from natural bentonite and denoted Mont-CTAB. We observed a gain in productivity of 25%. 2D-fractal dimension parameter decreased under 1.5, showing a de-organization of the cake due to clay particles in/on the cake and a specific resistance of 4.4×10 11m/kg was obtained in presence of clays versus 3.6×10 14m/kg with HA alone. Finally the development of clay assisted ultrafiltration process changes the cake morphology limiting fouling impact and it is hope that for long term experiments, formation of a gel-layer should be limited. © 2012 Elsevier B.V..

AB - Fouling studies with three different molecular weight cut-off (MWCO) (100. kDa, 30. kDa and 10. kDa) membranes in regenerated cellulose were carried out in the presence of Acros humic acids (HA) at pH 3.0, 6.7 and 9.5. It was shown that the tighter membranes were less fouled compared with the higher MWCO membranes. 100. kDa membrane showed the highest degree of fouling. The role of pH showed that the highest degree of fouling happened at a neutral pH (pH 6.7) and the lowest degree of fouling happened at a basic pH (pH 9.5).Effectiveness of a novel pre-treatment method was applied to the 100kDa membrane. We added in the HA solution clay particles, homemade synthetized from natural bentonite and denoted Mont-CTAB. We observed a gain in productivity of 25%. 2D-fractal dimension parameter decreased under 1.5, showing a de-organization of the cake due to clay particles in/on the cake and a specific resistance of 4.4×10 11m/kg was obtained in presence of clays versus 3.6×10 14m/kg with HA alone. Finally the development of clay assisted ultrafiltration process changes the cake morphology limiting fouling impact and it is hope that for long term experiments, formation of a gel-layer should be limited. © 2012 Elsevier B.V..

UR - http://hdl.handle.net/10754/597781

UR - https://linkinghub.elsevier.com/retrieve/pii/S0011916412000987

UR - http://www.scopus.com/inward/record.url?scp=84859429085&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2012.02.011

DO - 10.1016/j.desal.2012.02.011

M3 - Article

SN - 0011-9164

VL - 292

SP - 73

EP - 86

JO - Desalination

JF - Desalination

ER -

Clay filter-aid in ultrafiltration (UF) of humic acid solution

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