pH对厌氧颗粒污泥吸附4-氯酚的影响

研究了pH值对4-氯酚在厌氧颗粒污泥上的生物吸附特性的影响.结果表明,pH值对4-氯酚的吸附影响很大,pH值与吸附量呈负相关.随着pH值的升高,颗粒污泥对4-氯酚的吸附能力降低.pH为2.25时,吸附量为6.675　mg/g,而当pH为10.27时,吸附量仅为0.260　mg/g.不同的pH值下,4-氯酚在厌氧颗粒污泥上的吸附行为可以很好地用Langmuir吸附等温方程来描述.本研究还给出了几种pH值下厌氧颗粒污泥吸附4-氯酚的Langmuir和Freundlich方程.

Effect of pH on the Biosorption Behavior of 4-CP onto Anaerobic Granular Sludge

The effect of the initial pH value on the biosorption behavior of 4-CP onto anaerobic granular sludge was investigated in this paper. The experimental results indicated that the initial pH value is the important parameter affecting the biosorption of 4-CP, and the biosorption capacity of anaerobic granular sludge decreased with the increase of pH values. The biosorption capacity of 4-CP was 6.675mg/g at pH 2.25, while it was only 0.2596mg/g at pH 10.27. The equilibrium isotherm of 4-CP biosorption by anaerobic granular sludge was investigated at different pH values, and the results showed that the biosorption behavior of 4-CP could be described by the Langmuir model quite well. The coefficients of the Langmuir and the Freundlich equations of 4-CP biosorption by anaerobic granular sludge at different pH values were given.