| Sumari: | The compound 1,2-dichlorobenzene is very toxic and stable. Therefore
1,2-dichlorobenzene in the environment needs to be removed. The research aim is
to study the equilibrium of 1,2-dichlorobenzen in simulated waste water with
activated carbon.
The removal of 1,2-dichlorobenzene compound from simulated
wastewater in the batch process was carried out with activated carbon as
adsorbent. First, the 250 mL erlenmeyer was filled with 100 mL of 1.2-
dichlorobenzene with the concentration ranges from 6.5 to 42.5 mg/L.
Subsequently, 0.1 g activated carbon was added into the erlenmeyer, shaked in
bath shaker for duration of 60 minutes, left for 24 hours, and then the
concentration of 1,2-dichlorobenzene was analyzed using UV-Vis. The variables
studied were temperature between 25oC to 45oC and pH of the system between 4
to 11.
The results show that in general, 1,2-dichlorobenzene adsorption in
simulated wastewater with activated carbon follows the Freundlich model:
1/n
e F e q ô�� K C . The value of KF (Freundlich constant) increases as the temperature
increase and decrease as pH increase. In the range of pH and temperature studied,
the KF (Freundlich constant) is influenced by the pH of the solution and
temperature. The value of KF (Freundlich constant) as a function of temperature at
a certain pH is shown as follows:
� �
�
� �
� �
ô�� RT
798.00
F K 3.17 e (pH 4) and
� �
�
� �
� �
ô�� RT
390.60
F K 2.40 e (pH 6)
� �
�
� �
� �
ô�� RT
657.90
F K 2.90 e (pH 9) and
� �
�
� �
� �
ô�� RT
523.50
F K 2.17 e (pH 11)
Each equation applies to temperatures between 25-45 oC.
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