Use of low-cost adsorbents to chlorophenols and organic matter removal of petrochemical wastewater

Abstract

The removal of 2,4 diclorophenol (2,4-DCF) and 2,4,6 trichlorophenol (2,4,6 TCF) present in petrochemical wastewater was evaluated using low-cost adsorbents, such as chitin, chitosan and coconut shells. Batch studies showed that the absorption efficiency for 2,4 DCF and 2,4,6 TCF follow the order: chitosan > chitin > coconut shells. Langmuir and Freundlich models have been applied to experimental isotherms data, to better understand the adsorption mechanisms. Petrochemical wastewater treatment with fixed bed column system using chitinous adsorbents showed a removal of COD (75% ), TOG (90%) and turbidity (74-89%).