DYESTUFF REMOVAL FROM SYNTHETIC TEXTILE WASTEWATER USING OLIVE LEAF AS ADSORBENT MATERIAL

Abstract

The textile industry is one of the sectors where water use is high. Textile wastewater contains a high percentage of dyestuffs. Dyestuffs prevent photosynthetic activities in water and disrupt the ecological balance in water. Treatment of dyestuffs is very important for the prevention of water pollution and for the health of living things. There are several methods for the treatment of wastewater containing dyestuffs. In this study, it was aimed to remove dyestuff from synthetic textile wastewater by using olive leaf by adsorption method. The effects of initial pH, amount of adsorbent, contact time and temperature on adsorption were investigated. According to the data obtained, optimum conditions were determined as pH 2, 0.25 g of adsorbent, 2 hours of contact time, and a temperature of 25 °C. When the experimental data were applied to the kinetic models, it was observed that they conformed to the pseudo-second-order rate equation. The data obtained at the end of the experiments were applied to the Langmuir and Freundlich isotherm models. It was observed that the data obtained with olive leaf conformed to the Freundlich isotherm. The reaction for the olive leaf is an exothermic and occurs spontaneously, according to thermodynamic analysis. Negative entropy indicates a decrease in disorder in adsorption.

Keywords

• textile wastewater
• dyestuff
• adsorption
• olive leaf

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