活性炭对双吡唑模拟废水的选择性吸附及其再生

采用活性炭吸附法处理实验室条件下制备的双吡唑模拟废水，并对吸附饱和的活性炭进行芬顿氧化法再生。结果表明，在投加1 g/L活性炭，调节pH=1.5，常温下反应60 min时废水化学需氧量去除率为88.3%，双吡唑去除率为98.0%。活性炭对双吡唑的吸附行为符合二级动力学，而乙醇和正丁醇对活性炭吸附双吡唑无影响。对吸附饱和的活性炭进行处理，在投加0.3 g FeSO₄·7H₂O，6 mL H₂O₂，调节pH=3，常温下反应30 min时，活性炭再生效率可达68.25%。通过SEM扫描电镜对再生的活性炭进行表征，表明孔隙堵塞影响活性炭再生效率。活性炭能有效处理双吡唑模拟废水且具有很好的吸附选择性，芬顿氧化法可再生活性炭，实现活性炭循环利用。

Selective Adsorption of Bipyrazole Simulated Wastewater and Regeneration of Activated Carbon

The bipyrazole simulated wastewater prepared at laboratory conditions was treated by activated carbon， and the saturated activated carbon was regenerated by Fenton Oxidation. The results show that the removal rate of chemical oxygen demand and bipyrazole are 88.3% and 98.0% respectively at activated carbon of 1 g/L， the pH value of 1.5， reaction time of 60 min and room temperature. The adsorption of bipyrazole on activated carbon is consistent with the second-order kinetics， while the ethanol and n-butanol had no effect on the adsorption of bipyrazole by activated carbon. Then activated carbon with adsorption saturation was treated， and the regeneration efficiency of activated carbon reached 68.25% with FeSO₄·7H₂O of 0.3 g， H₂O₂ of 6 mL， pH value of 3 and the reaction time of 30 min.The regenerated activated carbon was characterized by scanning electron microscopy. The result indicates that the regeneration efficiency of activated carbon is affected by pore plugging. The bipyrazole simulated wastewater can be effectively treated by activated carbon with good adsorption selectivity. Regenerated activated carbon with Fenton oxidation realizes the recycling of activated carbon.