Third Day Poster Session, 17 June 2010 - NanoTR-VI

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Poster Session, Thursday, June 17
Theme F686 - N1123
The Use of Organoclay in Textile Waste Water Treatment
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UE. Perrin Akçakoca KumbasarUP P*, Seniha ElemenP Pand Saadet YaparP
PDepartment of Textile Engineering, Ege University, Izmir, Turkey
PDepartment of Chemical Engineering, Ege University, Izmir, Turkey
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Abstract- In this study organoclay was used as sorbent for textile dyes. The results obtained from the batch adsorption experiments showed that
organoclay has very strong sorption ability for textile dyes.
Textile wet processing involves the use of a variety of
chemicals including various classes of dyes and auxiliaries.
These components have negative environmental impact such
as the exceptionable coloring on the surface waters. Therefore
the methods for decoloration become important issue in recent
years [1].
In principle, decoloration is possible with one or more of the
following methods: adsorption, precipitation, chemical
degradation, photo degradation and biodegradation.
Adsorption appears to be a good method for the treatment of
textile industry effluents [2]. The process of adsorption is
being increasingly used for ecofriendly and economic
decoloration process of textile dye effluents. There are many
works on the adsorption systems; however dye adsorption is a
complicated process because of the nature of dye and their
behavior in aqueous solutions [1].
for 24h. The supernatants were analyzed by using a UV
spectrophotometer and adsorbed amounts were determined
from the difference between initial and final concentrations.
The change in % decoloration with dye concentration was
given in Figure 1.
Figure 2. (A), (B) and (C) Decoloration of reactive, dispers and
direct dyes with SAMPLE I; (D), (E) and (F) Decoloration of
reactive, dispers and direct dyes with SAMPLE II, respectively.
Figure 1. Structure of the clay
There are many sorbents for decoloration. In this work we
explored organoclay as sorbent for textile dyes. Clay minerals
having layered structure and a high surface area have been
easily modified to obtain in predescribed properties for a
special application [3,4]. For instance, they are modified
through the replacement of inorganic exchange cations with
quaternary alkylammonium derivatives to have an
organophilic material.
In this work, two different types of organoclay synthesized
by using Hexadecyltrimethylammonium (HDTMA) cations in
an amount equivalent to 100 % of cation exchange capacity of
clay (CEC) in a research laboratory in the Chemical
Engineering Department [5]. The synthesis conditions were
the same for both of the samples except the last step, drying.
At this step, the samples were dried by using a freeze dryer
and/or an oven. For the preceeding parts of the work, the clays
dried using oven and freeze dryer will be defined as SAMPLE
I and SAMPLE II, respectively.
The adsorption behavior of reactive, dispers and direct dyes
were studied by conducting batch adsorption experiments at
30 °C. The dispersions containing dye and clay were shaken
As shown in the Figure, Sample I and II have decoloration
efficiencies about %90 and %70, respectively. The increase in
% decoloration with increasing dye concentration indicates
that the oven dried clay will also be successful in high
concentration.
It was observed that the organoclay has potentiality in the
removal of textile dyes through adsorption. Also two types of
organoclay were compared by their sorption isotherms and it
was found that the clay dried using freeze dryer more
successful than the oven dried clay.
HT*Corresponding author: perrin.akcakoca@ege.edu.trTH
[1] Noroozi, B., Sorial, G.A., Haghi, A.K., 2008. Achievements in
Textile Dyes Removal Using Adsorption, Polymers Research
Journal, 2 (1), 29-58.
[2] Ceyhan, Ö., Baybas, D., 2001. Adsorption of Some Textile Dyes
by Hexadecyltrimethylammonium Bentonite, Turk J Chem 25 , 193 -
200.
[3] Bergaya, F., Lagaly, G., 2001. Surface modifictaion of clay
minerals, Applied Clay Science, 19, 1–3.
[4]Yılmaz, N., Yapar, S., 2004. Adsorption properties of tetradecyland
hexadecyl trimethylammonium bentonites, Applied Clay
Science, 27, 223-228.
[5]Yapar, S., 2009. Physicochemical study of microwave-synthesized
organoclays, Colloids and Surfaces A; Physicocherm, Engineering
Aspects,345, 75-81.
6th Nanoscience and Nanotechnology Conference, zmir, 2010 790