表面活性剂(SDS、CTAB)对苯达松在土壤中吸附的影响
首发时间:2017-05-26
摘要:采用批量平衡法研究了苯达松在 2 种土壤中的吸附行为,探讨了阴离子表面活性剂 SDS 和阳离子表面活性剂 CTAB 对苯达松在土壤中吸附的影响。结果表明,苯达松在 2 种土壤(宣城红壤土和亳州潮土)中的吸附均可用线性方程和Frenundlich 方程进行描述,苯达松在土壤中吸附常数Kf在 1.23-1.73 之间,说明苯达松在土壤中吸附较弱。通过比较 Kf 值,发现苯达松在土壤中的吸附量很小,其中宣城红壤土中的吸附量大于亳州潮土中的吸附量。阳离子表面活性剂 CTAB 能够明显提高苯达松在土壤中的吸附量,且随着 CTAB 浓度的增大而增大;阴离子表面活性剂 SDS 随着浓度的增加,苯达松的吸附量出现呈先下降后增高的规律。
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Effects of surfactant (SDS、CTAB) on the adsorption of Bendazone in different soils
Abstract:Batch equilibrium adsprption was used to research the adsorotion behavior of bentazone in two kinds of soils. The effect of anionic sufactant of SDS and the cationic sufactant of CTAB on the adsorption of bendazone in different soils was studied. The results showed that the adsorption equilibrium of bentazone in two soils(red soil from Xuancheng and moisture soil from Bozhou) could be verified by linear equation and Frenundlich equation, the adsorption constant of Kf ranged from1.23 to 1.73, which indicated that bentazone was lack of adsorption in solis. Comparing with the adsorption constant of Kf, the absorption rate of bentazone in the red soil was greater than that in the moisture soil. The cationic surfactant of CTAB could improve the absorption capacity of bentazone in two soils and the absorption increased with the CTAB concentration. And with the increase of the anionic surfactans SDS concentration, the adsorption of bentazone declined first and then increased.
Keywords: Bentazone surfactant adsorption soil
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No.4735440115186314****
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