[Characteristics of adsorption and desorption isotherm of cresol isomers on activated carbon].
Simulated wastewater containing o-, m- and p-cresol was used respectively to study the effects of substituted position on adsorption and desorption and the feasibility of activated carbon adsorption-bioregeneration treatment. According to the isotherm, the adsorbability sequences in the order of p-cresol > o-cresol > m-cresol, which is positively correlated to pK(a) and negatively correlated to solubility and critical oxidation potential (COP); and the desorbability sequences in the order of o-cresol > m-cresol > p-cresol, which is negatively correlated to boiling point and viscosity. According to comparative analysis, irreversible adsorption is found to be the main reason for differences between adsorption and desorption isotherms. A mathematical statistics method was applied to estimate the amount of irreversible adsorption. The irreversible adsorption amounts of o, m, p-cresol are 27.9 mg/g, 28.5 mg/g and 33.4 mg/g, respectively.
You
Tao
T
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, Dalian University of Technology, Dalian 116023, China. xue0717@sina.com
Zhang
Ai-Li
AL
Zhou
Ji-Ti
JT
D000327:Adsorption; D001419:Bacteria / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002606:Charcoal / Q000737:chemistry*; D003408:Cresols / Q000737:chemistry / Q000302:isolation & purification*; D007536:Isomerism; D008962:Models, Theoretical; D014865:Waste Disposal, Fluid / Q000379:methods*
D003408:Cresols; D002606:Charcoal; C077977:cresol