EFFECTS OF TEMPERATURE ON CHARACTERISTICS OF BORON ADSORPTION-DESORPTION BY MINERALS
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    Abstract:

    Effects of temperature on characteristics of boron adsorption-desorption by Ca-montmorillonite, goethite and manganite were studied.The results showed that boron adsorption by Ca-montmorillonite increased with increasing temperature, whereas boron adsorption by goethite and manganite decreased as temperature rose.Boron adsorption-desorption by Ca-montmorillonite was less hysteretic as compared to goethite and manganite in terms of boron desorption rates at different temperatures.At constant temperature, boron adsorption heat for Ca-montmorillonite, goethite and manganite were 63.08, -122.45 and -93.91 kJmol-1, respective desorption heat were -31.02, 53.95 and 46.30 kJmol-1.The process of boron adsorption by Ca-montmorillonite was endothermic.By contrast, the process for goethite and manganite were exothermic.As temperature rose, boron reacted faster with minerals initially.However, the reaction rate as a whole slightly decreased.

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Cheng Dong-sheng, Zhu Duan-wei, Liu Wu-ding. EFFECTS OF TEMPERATURE ON CHARACTERISTICS OF BORON ADSORPTION-DESORPTION BY MINERALS[J]. Acta Pedologica Sinica,2002,39(6):822-829.

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History
  • Received:December 21,2000
  • Revised:July 08,2001
  • Adopted:
  • Online: February 25,2013
  • Published: