电气石辅助芬顿反应提高废水可生化性的试验

以电气石陶粒辅助芬顿(Fenton)反应降解焦化废水。对比试验表明,常规Fenton反应和电气石陶粒辅助Fenton反应对化学需氧量(COD)降低效果无明显区别,但可生化性效果有显著差别,BOD_5与COD_Cr比值分别为20.3%和73.5%。原因是,电气石阴极的还原性使Fenton试剂的关键要素Fe~(2+)得以持续生成,有利于形成更多的羟基自由基·OH,使废水中的高毒大分子有机物分解为低毒、无毒的小分子有机物;同时,电气石的静电场和远红外线发挥了辅助作用。

The Experimental Research on the Biodegradability Enhancement of Wastewater by the Tourmaline Ceramsite Assisted Fenton Reaction

In this experiment,the coking wastewater was degraded by Fenton reaction assisted by tourmaline ceramsite.Comparative experiments showed that there was no significant difference in CODCr reduction between conventional Fenton reaction and tourmaline ceramsite assisted Fenton reaction,but there was significant difference in biodegradability,with the ratio of BOD5 and CODCr being 20.3%and 73.5%,respectively.The reason is that the reductivity of tourmaline cathode enables the continuous production of Fe2+,which is conductive to the formation of more hydroxyl radical·OH,promoting the decomposition of high-toxic macromolecular organic matter in wastewater into low-toxic and non-toxic small-molecule organic matter.At the same time,the electrostatic field and far infrared ray of tourmaline play an auxiliary role.