土壤悬浮液中双酚A的光降解研究

Photodegradation of bisphenol A in soil suspensions

实验研究了双酚A在土壤表面的吸附特征及在土壤悬浮液中的光降解。研究结果表明,双酚A在土壤表面的吸附为单分子的化学吸附,用Langmuir模型或Freundlich模型拟合时相关性较好。在高压汞灯(λ=300nm)照射下,双酚A在土壤悬浮液中能快速降解,降解速度随酸度的增大而加快。在此体系中双酚A光降解动力学遵循Langmuir-Hinshelwood(H-L)方程,在土壤量不超过10g/L的条件下,降解率随土壤量增加而增加,加入腐殖酸可以促进双酚A的光解,同时增大光照强度有利于双酚A的降解。

The adsorption performances and photodegradation of Bisphenol A（ BPA ） in soil suspensions were investigated in this study. The results showed that the adsorption of BPA on the surface of soils was fitted to the Langmuir equation or Freundlich equation, BPA could be quickly degraded in the soil suspensions under the irradiation of a high pressure mercury lamp （λ=300nm） ,and the rate increased with increasing the acid of the systems. The photodegradation rate of BPA was fitted well into the Langmuir-Hinshelwood equation. Results also indicated that the ratio of BPA degradation increased with increasing the dosage of soil within the 10g/L. tlumic acids led to enhanced photodegmdation of BPA ,and the higher light intensity result in the more effective photodegradation of BPA.