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应用生态学报 ›› 1995, Vol. 6 ›› Issue (2): 206-211.

• 研究论文 • 上一篇    下一篇

洗涤剂LAS在土壤上吸附行为及机理研究

区自清, 贾良清, 何耀武, 常士俊, 孙铁珩, Ayfer Yediler, Antonius Kettrup   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110015;
    2. 德国环境与辐射研究中心生态化学研究所
  • 收稿日期:1994-10-21 修回日期:1995-01-26 出版日期:1995-04-25 发布日期:1995-04-25
  • 基金资助:

    国家自然科学基金;UNESCO中德国际合作CERP计划资助.

Adsorption behaviour and its mechanism of linear alkylbenzene sulphonate (LAS) on soils

On Ziqing, Jia Liangqing, He Yaowu, Chang Shijun, Sun Tieheng, Ayfer Yediler, Antonius Kettrup   

  1. 1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015;
    2. CSF-Forschungszentrum für Umwelt und Cesundheit CmbH, Institut für Okologische Chemie, Neuherb D-85758 Öberschleibheim, Germany
  • Received:1994-10-21 Revised:1995-01-26 Online:1995-04-25 Published:1995-04-25

摘要: 使用连续反应器研究了25℃温度下LAS在土壤上吸附的行为和机理。LAS在自然土壤上的吸附等温线可分成线性和指数增长两个阶段。在低LAS浓度(<90μgml-1)下,吸附等温线为直线,Kd=1.2-2.0.在高LAS浓度(>90μgml-1)时,LAS产生协同吸附,吸附量呈指数增加。土壤吸附LAS的机理主要是专性点位表面相互作用及氢键,吸附容量主要取决于土壤物理性粘粒的含量。

关键词: 表面活性剂, 洗涤剂, 直链烷基苯磺酸, LAS, 吸附, 分配系数, 固氮树种, 磷脂脂肪酸, 杉木, 酶活性

Abstract: The adsorption behaviour and its mechanism of linear alkylbenzene sulphonate (LAS) onsoils are studied at 25℃ using a continuous adsorption apparatus.The adsorptionisotherms of LAS on natural soils could be divided into two stages of linear and exponentially increasing.At low LAS contents (<90 μg ml-1), the adsorption isotherms are linear (Kd= 1.2-2.0), and at high contents (>90 μg ml-1), the cooperative adsorption isobserved and the adsorption amount of LAS is increased exponentially.The adsorptionmechanisms are mainly specific site surface interactions and hydrogen bonding, while theadsorption capacity is significantly dependent on the physical clay content of soils.

Key words: Surfactant, Detergent, Linear alkylbenzene sulphonate (LAS), Adsorption, Distribution coefficient, N-fixing tree species, enzyme activity, Chinese fir, PLFA