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AuthorAl-Risheq D.I.M.
AuthorShaikh S.M.R.
AuthorNasser M.S.
AuthorAlmomani F.
AuthorHussein I.A.
AuthorHassan M.K.
Available date2022-04-25T10:59:41Z
Publication Date2022
Publication NameColloids and Surfaces A: Physicochemical and Engineering Aspects
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.colsurfa.2022.128305
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85122838314&doi=10.1016%2fj.colsurfa.2022.128305&partnerID=40&md5=a92cd3f9425b2fedbc2fa13f7ca57021
URIhttp://hdl.handle.net/10576/30363
AbstractIn this study, the influence of a hybrid coagulation/flocculation process on the electrokinetic of highly stable bentonite suspension has been examined. Choline chloride (ChCl) based natural deep eutectic solvent (NADES) was utilized as coagulant coupled with polyacrylamide (PAM) with different charge types and densities used as a flocculant. Turbidity, zeta potential, and floc size analysis were used to evaluate the changes in the flocculation efficiency of hybrid systems relative to the single NADES and PAM systems. The study revealed a clear impact on the flocculation behavior of cationic and anionic PAMs in the presence of NADES. The addition of NADES as a coagulant aid reversed the flocculation activities of the PAMs due to the presence of positively charged NADES that enhances the adsorption of the anionic polyacrylamide (APAM) over the cationic polyacrylamide (CPAM). Low flocculation efficiency was observed for the hybrid systems of NADES/CPAM as indicated by the highly positive zeta potential () and small flocs (). Hybrid systems of NADES/ APAMs, on the other hand, significantly improved the flocculation efficiency by achieving a zeta potential within the instability region () and relatively large flocs . Aside from the charge type, the molecular weight (MW) and charge density (CD) of the PAM had a significant impact on the flocculation behavior of bentonite suspension. High PAM adversely impacted the flocculation parameters for APAMs. Therefore, a hybrid system of NADES/ AN 923 SH at an APAM dosage of with residual turbidity of 0.3 NTU, -potential of and of was the optimum system with the most significant enhancements compared to single systems.
SponsorThis publication was partially funded by the UREP28-041-2-016 and NPRP12S-0130-190023 grant from the Qatar National Research Fund (a member of Qatar Foundation). In addition, Open Access funding provided by the Qatar National Library. The statements made herein are solely the responsibility of the authors.
Languageen
PublisherElsevier B.V.
SubjectBentonite
Chlorine compounds
Coagulation
Efficiency
Hybrid systems
Polyelectrolytes
Turbidity
Zeta potential
Anionic polyacrylamide
Bentonite suspensions
Cationics
Choline chloride
Coagulation-flocculation process
Deep eutectic solvents
Electro-kinetics
Flocculation efficiency
Highly stables
Natural deep eutectic solvent
Flocculation
TitleEnhancing the flocculation of stable bentonite suspension using hybrid system of polyelectrolytes and NADES
TypeArticle
Volume Number638
dc.accessType Abstract Only


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