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dc.contributorFaculty of Construction and Environmenten_US
dc.creatorTang, Hui-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/7613-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleAdsorption of SDS from greywater on CTAB and its analogues modified Na-zeoliteen_US
dcterms.abstractThis article investigated the adsorption capacities and mechanisms on sodium dodecyl sulfate (SDS) of several different surfactant modified zeolites (SMZ). The SMZs are prepared by loading the analogues of CTAB such as HO(CH₂)₁₀N(CH₃)₃, Br(CH₂)₁₀N(CH₃)₃, (CH₃)₃N(CH₂)₁₀N(CH₃)₃. The performance of adsorbents, thermodynamics and the influence of temperature were researched in this work. Molecular level thermodynamic parameters such as Gibbs free energy, enthalpy change and entropy change were obtained from ITC test. The batch experiments show that with the same length of carbon chain, bromide group component has the best adsorption performance and hydroxyl group compound is the worst. With the same functional group (OH), compound which has longer carbon chain has better adsorption performance. These results can be proved by ITC test. At the molecular level, the Gibbs free energy of CTAB, CH₃(CH₂)₁₃N(CH₃)₃, Br(CH₂)₁₄N(CH₃)₃, HO(CH₂)₁₄N(CH₃)₃ with SDS are -7.81,-7.48, -7.15, 1.98 Kcal/mol separately. Apparently, CTAB is the most likely to combine with SDS and Br(CH₂)₁₄N(CH₃)₃ is also easy to react with a very close ΔG. As for the inorganic components such as sulfate and phosphate, their influence on modification process is negligible according to the ITC test.en_US
dcterms.extenti, 29 leaves : color illustrations ; 30 cmen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2014en_US
dcterms.educationalLevelAll Masteren_US
dcterms.educationalLevelM.Sc.en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.LCSHSewage -- Purificationen_US
dcterms.LCSHWater reuseen_US
dcterms.LCSHEnvironmental engineeringen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/7613