Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-05-10 , DOI: 10.1016/j.jhazmat.2021.126026 Lu Li 1 , Jinlan Xu 2 , Yuheng Wang 3 , Zena Zhang 3 , Yin Ye 3
Recyclable Fe in soil was prepared by using fermented food waste supernatant. The efficient cyclic oxidation of long-chain alkanes in oil-contaminated soils could be achieved by Fenton oxidation with the recyclable Fe. The oxidation efficiency of macro long-chain alkanes (C27-C30) from the first cycle (63.4%) to the last cycle (60.1%) showed no significant decrease during three-cycle Fenton oxidation with the recyclable Fe. However, for the oil-absorbing Fe prepared by HA and Fe-SOM prepared by Cs, the oxidation efficiency of C27-C30 could not be efficiently cyclic oxidized during three-cycle Fenton oxidation. Further analysis showed that the proportion of Fe(III) in the recyclable Fe was higher than that in the oil-absorbing Fe or the Fe-SOM, where the iron content was similar. Moreover, more fulvic-like acid and humic-like acid were found in the recyclable Fe, and thus many Fe(III) ions simultaneously combined with the fulvic-like acid and humic-like acid through –C–O–C and C˭O bonds in the recyclable Fe. It was the recyclable Fe with such a stable structure that could still maintain high catalytic activity and efficiently cyclic oxidize macro long-chain alkanes during three-cycle Fenton oxidation, which is valuable for its repeated use.
中文翻译:
利用可回收铁的Fenton氧化技术对土壤中长链长链烷烃进行高效循环氧化
土壤中的可回收铁是通过使用发酵后的食物垃圾上清液制备的。长链烷烃在油污染土壤中的有效循环氧化可通过Fenton可回收铁氧化实现。大环长链烷烃(C 27 -C 30)从第一个循环(63.4%)到最后一个循环(60.1%)的氧化效率在三循环Fenton氧化过程中没有显示出明显的下降。然而,对于HA制得的吸油Fe和Cs制得的Fe-SOM,C 27 -C 30的氧化效率在三循环芬顿氧化过程中不能被有效地循环氧化。进一步的分析表明,在可回收的Fe中,Fe(III)的比例高于铁含量相似的吸油Fe或Fe-SOM中的比例。此外,在可回收的Fe中发现了更多的黄腐酸和腐殖酸,因此许多Fe(III)离子通过–C–OC–C和C˭同时与黄腐酸和腐殖酸结合。可回收铁中的O键。具有这种稳定结构的可回收铁仍可以保持高催化活性,并在三循环Fenton氧化过程中有效地循环氧化长链长链烷烃,这对于其重复使用非常有价值。