International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
Call for Papers | Fully Refereed | Open Access | Double Blind Peer Reviewed

ISSN: 2319-7064


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Research Paper | Environmental Science Studies | Nigeria | Volume 13 Issue 3, March 2024


Elimination of Chemical Oxygen Demand in Aqueous Solutions Contaminated with 2 - (N, N - Dimethyl - 4 - aminophenyl) - azo - benzene Carboxylic Acid (DMABA), N - propanol and Kerosene: Effect of pH

Pereware Adowei


Abstract: The pH of the contact solution is an important parameter controlling the adsorption process in terms of acidity. The adsorption capacity decreases as the acidity of the contact solution increases. Synthetic Organic Chemicals (SOCs) are man - made carbon - based compounds that are less likely to escape into the atmosphere and hence could get into aquatic water bodies through terrestrial runoff or discharge from factories. This paper therefore investigated the effect of pH on the elimination of 2 - (N, N - Dimethyl - 4 - aminophenyl) - azo - benzene carboxylic acid (DMABA), n - propanol and kerosene in contaminated aqueous solutions by physically activated Carbon (PCC), acidic reagent activated carbon (AAC), basic reagent activated carbon (BAC) obtained from Nipa palm ferns and commercial activated carbon (CAC) as a control. The index of measurement used was chemical oxygen demand. The pH - dependency on the COD reduction were 66.7 %, 58.2 %, 76.8 % and 89.4 % for PCC, AAC, BAC and CAC respectively. The data showed that with or without activation of the carbons, the COD elimination improved as pH value raised from 2 to 9.2. An optimum in the COD elimination was obtained at about pH 8.5. The results obtained show that pH has a profound effect on the elimination process, this is because increase in pH of the contact solution leads to decrease in elimination capacity, thus a disruption in the elimination of organic chemicals in contaminated acqueous system, hence, selection of optimum pH is very essential.


Keywords: Synthetic organic chemicals, chemical oxygen demand, adsorption, Nipa Palm, pH


Edition: Volume 13 Issue 3, March 2024,


Pages: 366 - 371


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