摘要：

Coconut coir pith, a solid waste generated in coir fibre industries, was carbonized and used as adsorbent for the removal of 2,4‐dichlorophenol (2,4‐DCP) from water. Varying parameters such as agitation time, 2,4‐DCP concentration, adsorbent dose, pH, and temperature were investigated. Adsorption equilibrium reached at 60, 80, 100, and 120min for 2,4‐DCP concentrations of 10, 20, 30, and 40mgL1, respectively. Adsorption followed pseudo‐second order kinetics. The adsorption equilibrium data moderately obeyed Langmuir and Freundlich isotherms. The adsorption capacity was found to be 19mgg1 of carbon. Increase of temperature increased adsorption. Acidic pH was favorable for the adsorption of 2,4‐DCP. Studies on pH effect and desorption show that both physisorption and chemisorption were involved in the adsorption process.

展开