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超声协同交联β -环糊精处理苯酚废水

周玉青1,2,韩萍芳2,吕效平2   

  1. 1南京化工职业技术学院,江苏 南京 210048;2南京工业大学化学化工学院,江苏 南京 210009
  • 出版日期:2014-03-05 发布日期:2014-03-05

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

ZHOU Yuqing1,2,HAN Pingfang2,Lü Xiaoping2   

  1. 1 Nanjing College of Chemical Technology,Nanjing 210048,Jiangsu,China;2 College of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 210009,Jiangsu,China
  • Online:2014-03-05 Published:2014-03-05

摘要: 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100 mg/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%。

关键词: 交联β-环糊精, 超声, 苯酚废水, 吸附

Abstract: New functional materials crosslinking β-cyclodextrin(MDI-β-CD) can be used for better treatment of wastewater containing phenol because of the special structure. Modified crosslinking β-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%.

Key words: crosslinking β-cyclodextrin, ultrasound, phenol wastewater, absorption

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