Sorption and degradation of bisphenol A by aerobic activated sludge |
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Authors: | Zhao Junming Li Yongmei Zhang Chaojie Zeng Qingling Zhou Qi |
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Affiliation: | aState Key laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China |
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Abstract: | Laboratory-scale batch experiments were conducted to investigate the sorption and degradation of bisphenol A (BPA) at μg/L range in an aerobic activated sludge system. The sorption isotherms and thermodynamics indicated that the sorption of BPA on sludge was mainly a physical process in which partitioning played a dominating role. The values of sorption coefficient Koc were between 621 and 736 L/kg in the temperature range of 10–30 °C. Both mixed liquor suspended solid (MLSS) and temperature influenced BPA sorption on sludge. The degradation of BPA by acclimated activated sludge could be described by first-order reaction equation with the first-order degradation rate constant of 0.80 h?1 at 20 °C. The decrease of initial COD concentration and the increase of MLSS concentration and temperature enhanced BPA degradation rate. The removal of BPA in the activated sludge system was characterized by a quick sorption on the activated sludge and subsequent biodegradation. |
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Keywords: | Bisphenol A Sorption Degradation Aerobic Activated sludge |
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