School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
Bioresour Technol. 2012 Jun;114:179-87. doi: 10.1016/j.biortech.2012.03.065. Epub 2012 Mar 29.
A kinetic model incorporating adsorption, desorption and biodegradation processes was developed to describe the bioregeneration of granular activated carbon (GAC) loaded with 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP), respectively, in simultaneous adsorption and biodegradation processes. The model was numerically solved and the results showed that the kinetic model was well-fitted (R(2)>0.83) to the experimental data at different GAC dosages and at various initial 4-CP and 2,4-DCP concentrations. The rate of bioregeneration in simultaneous adsorption and biodegradation processes was influenced by the ratio of initial chlorophenol concentration to GAC dosage. Enhancement in the rate of bioregeneration was achieved by using the lowest ratio under either one of the following experimental conditions: (1) increasing initial chlorophenol concentration at constant GAC dosage and (2) increasing GAC dosage at constant initial chlorophenol concentration. It was found that the rate enhancement was more pronounced under the second experimental condition.
建立了一个包含吸附、解吸和生物降解过程的动力学模型，以描述分别负载 4-氯苯酚（4-CP）和 2,4-二氯苯酚（2,4-DCP）的颗粒活性炭（GAC）在同时吸附和生物降解过程中的生物再生。该模型进行了数值求解，结果表明，在不同的 GAC 剂量和不同的初始 4-CP 和 2,4-DCP 浓度下，动力学模型与实验数据拟合良好（R(2)>0.83）。同时吸附和生物降解过程中的生物再生速率受到初始氯苯酚浓度与 GAC 剂量比的影响。在以下实验条件之一下，通过使用最低的比率，可以实现生物再生速率的提高：（1）在恒定 GAC 剂量下增加初始氯苯酚浓度，（2）在恒定初始氯苯酚浓度下增加 GAC 剂量。结果发现，在第二种实验条件下，速率增强更为明显。
