Bioadsorption of 4-Chlorophenol to the Activated Sludge
Jianlong Wang, Nigel John Horan, Ed. Stentlford, Yi Tai Qian · Tsinghua Science & Technology · 2012
Abstract The adsorption behaviour of 4-chlorophenol from aqueous solution to activated sludge was quantitatively characterized in this paper. The effects of the initial pH values, initial chlorophenol concentration and adsorbent dosage on bioadsorption were investigated. The maximum adsorption capacity was found to be 110. 5 mg/g at 100 mg/L initial concentration. The Freundlich and Langmuir adsorption isotherms were applied to describe the biosorption processes and the isotherm constants were evaluated. Key words 4-chlorophenol; priority pollutant; bioadsorption; activated sludge Introduction Chlorinated phenolic compounds, which are generated from a number of industrial manufacturing processes, comprise the bulk of the environmental pollutants. Aqueous effluents from industrial operations such as polymeric resin production, oil refining, iron-steel, petroleum, pesticide, paint, solvent, pharmaceutics, wood preserving chemicals, coke-oven, and paper and pulp industries contain chlorophenolic compounds. Their fate in the environment is of great importance as they are toxic, recalcitrant and bioaccumulating