Adsorption of SDS from greywater on CTAB and its analogues modified Na-zeolite

Pao Yue-kong Library Electronic Theses Database

Adsorption of SDS from greywater on CTAB and its analogues modified Na-zeolite

 

Author: Tang, Hui
Title: Adsorption of SDS from greywater on CTAB and its analogues modified Na-zeolite
Degree: M.Sc.
Year: 2014
Subject: Hong Kong Polytechnic University -- Dissertations
Sewage -- Purification
Water reuse
Environmental engineering
Department: Faculty of Construction and Environment
Pages: i, 29 leaves : color illustrations ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2759226
URI: http://theses.lib.polyu.edu.hk/handle/200/7613
Abstract: This 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.

Files in this item

Files Size Format
b27592261.pdf 1.093Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

     

Quick Search

Browse

More Information