Vergili Ilda, Gencdal Sezin
Water Environ Res. 2017 Jul 1;89(7):641-651. doi: 10.2175/106143017X14902968254520.
The removal of organic matter and etodolac (an anti-inflammatory pharmaceutical) from a real process wastewater by using powdered activated carbon (PAC) adsorption before and after Fenton oxidation has been studied. The wastewater sample is collected from the final stage of chemical synthesis of a pharmaceutical (etodolac). Fenton oxidation resulted with decrease in chemical oxygen demand (84% removal) and etodolac concentration was reduced to 0.7 mg L-1. Optimum adsorption equilibrium conditions were found as t = 16 hours, and m = 10 g L-1. The Freundlich model showed the best fit for the adsorption of both wastewater with R2 values of 0.89 and 0.99. Lower pseudo-second-order rate constant (k2) (0.067 < 2.62) obtained from the adsorption of raw wastewater with higher organic matter concentration confirms the chemisorption of the adsorbates onto the PAC. Pore surface mass diffusion with R2 value of 0.92 was found as rate-controlling step for adsorption process with Fenton pre-treated wastewater.
研究了在芬顿氧化前后使用粉末活性炭（PAC）吸附法去除实际工艺废水中的有机物和依托度酸（一种抗炎药物）。废水样本取自一种药物（依托度酸）化学合成的最后阶段。芬顿氧化使化学需氧量降低（去除率84%），依托度酸浓度降至0.7 mg L-1。最佳吸附平衡条件为t = 16小时，m = 10 g L-1。弗伦德利希模型对两种废水的吸附拟合效果最佳，R2值分别为0.89和0.99。从有机物浓度较高的原废水吸附中获得的较低的伪二级速率常数（k2）（0.067 < 2.62）证实了吸附质在PAC上的化学吸附。对于经芬顿预处理的废水，吸附过程的速率控制步骤为孔表面质量扩散，R2值为0.92。
