National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The problem of the elimination of bisphenol A from aquatic environments by low-cost, efficient and accessible processes is a major problem for water treatment specialists, especially in developing countries. Many studies have investigated the adsorption of certain endocrine disruptors on materials such as activated carbon and zeolite. However, the use of clays remains rare. The objective of this study is to evaluate the adsorption capacity of bisphenol A on two types of clay balls from Daloa and Korhogo ; two localities in the Ivory Coast. The balls were fabricated from clay powders of diameter between 45 and 125 µm. The balls of clay obtained, of diameter 5mm, were dried before being calcined at 550°C in a Naberthern muffle furnace. The specific surface area and the pH of zero charge were determined by analytical methods. The influence of contact time adsorbent-adsorbate, initial concentration and pH of the bisphenol A solution on adsorption was studied, in batch mode, in order to determine the best conditions for removal of the pollutant. The determination of residual concentrations was carried out with a JENWAY 6850 UV-Visible spectrophotometer. The adsorption results showed that after 4 hours, the elimination of bisphenol A was maximal with a yield of 92.99%, at pH 9, for the Daloa clay. For the Korhogo clay, a removal yield of 69.03% is observed at pH 4, after 5 hours of contact time. It is also noted that the pseudo-second order kinetic model describes correctly the adsorption of bisphenol A on the two materials. These results indicate that the bisphenol A can be effectively removed by the balls elaborated from Ivory Coast clays.
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