双酚A的活性炭吸附特性

Adsorption Principles of Biphenol-A by Activated Carbon

研究了活性炭吸附双酚A(BPA)的规律、吸附特性和吸附处理效果。结果表明:吸附速度快,1 h达到平衡。吸附符合弗兰德利希公式,吸附常数K=191 m g/g,1n=0.239。吸附容量大,且受被吸附质浓度的影响小。当pH>9和有其他有机物存在时,因BPA发生电离和竞争吸附使吸附容量减小,吸附规律发生变化。但活性炭吸附可使BPA浓度降低到0.08 m g/L以下,是处理含BPA废水的一种有效方法。

Adso rapid, and the liquid solute adsorbed per rptlon -solid of equ b il unit mass o phenol-A （BPA） by activated carbon was studied. Adsorption velocity is brium is accomplished within 1 h. The relationship between the quantity of f adsorbent and the solution concentration at the equilibrium state can be 1 0. 239. When pH described by Freudlich isotherm equilibrium model, qe=Kc^1/n, while K= 191 mg/g, 1/n= 9 and other organic compounds existing, adsorption capacity reduces and the principle of adsorption changes because of BPA ionization and compertitive adsorption. However, using activated carbon adsorp tion method, the effluent BPA concentration can be achieved less than 0.08 mg/L. Adsorption by activat ed carbon is one of the effective methods for BPA containing wastewater treatment.