Ng S L, Seng C E, Lim P E
School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
Chemosphere. 2009 Jun;75(10):1392-400. doi: 10.1016/j.chemosphere.2009.02.049.
The bioregeneration efficiencies of powdered activated carbon (PAC) and pyrolyzed rice husk loaded with phenol and p-nitrophenol were quantified by oxygen uptake measurements using the respirometry technique in two approaches: (i) simultaneous adsorption and biodegradation and (ii) sequential adsorption and biodegradation. It was found that the applicability of the simultaneous adsorption and biodegradation approach was constrained by the requirement of adsorption preceding biodegradation in order to determine the initial adsorbent loading accurately. The sequential adsorption and biodegradation approach provides a good estimate of the upper limit of the bioregeneration efficiency for the loaded adsorbent in the simultaneous adsorption and biodegradation processes. The results showed that the mean bioregeneration efficiencies for PAC loaded with phenol and p-nitrophenol, respectively, obtained using the two approaches were in good agreement.
采用呼吸测定技术，通过氧气吸收测量，以两种方法对负载苯酚和对硝基苯酚的粉末活性炭（PAC）和热解稻壳的生物再生效率进行了量化：（i）同时吸附和生物降解，以及（ii）顺序吸附和生物降解。结果发现，为了准确确定初始吸附剂负载量，同时吸附和生物降解方法的适用性受到生物降解前需先进行吸附这一要求的限制。顺序吸附和生物降解方法能很好地估计同时吸附和生物降解过程中负载吸附剂生物再生效率的上限。结果表明，使用这两种方法分别获得的负载苯酚和对硝基苯酚的PAC的平均生物再生效率吻合良好。
