Abstract
This chapter discusses the batch adsorption treatment of textile wastewater using naturally prepared adsorbents in order to remove COD, BOD, and color. The effects of various process parameters like adsorbent dose, contact duration, temperature, pH, and agitator speed are explored. All these adsorption data are analyzed using the Freundlich and Langmuir adsorption isotherm models. From the batch adsorption treatment, we concluded that activated neem leaf powder (a-NLP) is found to be the best among all adsorbents investigated for textile wastewater treatment. Maximum removal of COD (100%), BOD (98.9%), and color (100%) are attained at a temperature of 300K with contact duration of 90min and dosage of 25g/L of a-NLP. The highest adsorption capacities (θ0) related to the Langmuir isotherm are found to be 1.34, 0.82, and 0.31mg/g for COD, BOD, and color, respectively, using a-NLP.
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