三种铁矿物对双酚A吸附性能的影响

Eeffects of three kinds of iron minerals on the adsorption behavior of bisphenol A

为利用铁矿进行非均相Fenton/光-Fenton处理有机污染物提供理论基础,对针铁矿、赤铁矿、磁铁矿等3种不同的铁矿物在不同条件下对双酚A(BPA)的吸附性能进行了研究。结果表明,在选定的条件范围内,铁矿物对(BPA)的吸附率普遍较低:在中性条件下,3种铁矿对BPA的吸附效果更好,去除率分别为11. 0%、9. 0%、4. 8%,p H高于或低于7. 0时BPA的吸附率均降低;初始铁氧化物浓度为0. 25 g/L的固定条件下,当BPA的浓度为5μmol/L时,BPA的吸附效果最佳,其吸附率分别为16. 0%、14. 8%、7. 8%; BPA的吸附率随3种铁矿投加量的增加而提高,铁氧化物的浓度为0. 5 g/L时,3种铁矿对BPA的吸附效果最好,其吸附率分别为12. 56%、12. 10%、6. 76%。

In order to provide a theoretical basis for the use of iron oxides in heterogeneous Fenton/photo-Fenton process,the experiment was conducted to detect the BPA adsorption onto the goethite,hematite and magnetite respectively under different conditions.The results showed that the BPA adsorption onto the iron oxides was quite low under the experimental conditions.The maximum BPA adsorption was achieved at neutral pH,with the removal rate of 11.0%,9.0%and 4.8%,respectively.The BPA adsorption decreased when the pH was higher or lower than 7.0.Under the conditions of 0.25 g/L iron oxide and 5μmol/L BPA concentration,the removal efficiency by goethite,hematite and magnetite for bisphenol A was the highest,with the removal rate of 16.0%,14.8%and 7.8%,respectively.The adsorption increased according to the increase of the iron oxides,under the conditions of 0.5 g/L iron oxide,the removal efficiency by goethite,hematite and magnetite for bisphenol A was the best,with the removal rate of 12.56%,12.10%and 6.76%,respectively.