超声协同交联β-环糊精处理苯酚废水

Study on the efficient removal of phenol wastewater using crosslinking β-cyclodextrin adsorbent in ultrasound-aided

环糊精因其特殊的结构特点,尤其是经过交联剂改性的交联β-环糊精(MDI-β-CD),可以处理与其空腔尺寸匹配的苯酚污染物,具有更好的处理苯酚废水的能力。为进一步提高MDI-β-CD处理苯酚废水的效果,研究其在超声协同条件下的废水处理能力和适合工况。通过对MDI-β-CD用量、废水pH值、废水浓度、超声声强和频率的研究,找到处理苯酚废水的适合工艺条件:超声频率20 kHz,超声声强0.2 W/cm2,苯酚初始浓度100mg/L,pH值6.0,溶液体积100 mL,反应温度40℃,吸附时间120 min,MDI-β-CD用量40 g/L;在此条件下,MDI-β-CD与超声协同处理苯酚废水吸附效率可以达到94.1%。

New functional materials crosslinkingβ-cyclodextrin（MDI-β-CD） can be used for better treatment of wastewater containing phenol because of the special structure. Modified crosslinkingβ-cyclodextrins has the ability to absorb phenol pollutants because of the porous structure. In order to improve treatment effects,the treatment abilities of MDI-β-CD and the suitable working conditions of the phenol wastewater were studied using ultrasonic. The dosage of MDI-β-CD , the pH and concentration of wastewater,ultra sound intensity and frequency were investigated. The suitable technological conditions of adsorption were determined as the following：pH 6.0,initial concentration 100 mg/L,wastewater volume 100 mL,new type crosslinking β-cyclodextrins 40 g/L,absorption temperature 40 ℃,absorption time 120 min. The ultrasound parameters were 0.2 W/cm2 of ultrasonic intensities and 20 kHz ultrasonic frequency. The absorption efficiency was up to 94.1%.