鎳鐵氧體催化過硫酸氫鉀對(duì)奧卡西平的降解研究
發(fā)布時(shí)間：2018-08-03 14:15
【摘要】：研究了通過水熱合成法制備的鎳鐵氧體(NiFe_2O_4),催化過硫酸氫鉀(PMS)產(chǎn)生自由基,在常溫常壓下降解奧卡西平(OXC).采用掃描電子顯微鏡(SEM)、X射線粉末衍射(XRD)及磁滯回線對(duì)鎳鐵氧體催化劑進(jìn)行了表征;探究了PMS投加量、NiFe_2O_4投加量以及初始pH對(duì)OXC降解效率的影響,結(jié)果顯示提高PMS和NiFe_2O_4的投量以及偏中性的初始pH均有利于OXC的降解.通過投加不同種類的猝滅劑(甲醇和叔丁醇),證實(shí)了OH·和SO_4~-·對(duì)OXC的降解起著重要作用,且SO_4~-·的作用更顯著.此外,進(jìn)一步的試驗(yàn)發(fā)現(xiàn)NiFe_2O_4具有較好的穩(wěn)定性和重復(fù)利用性:經(jīng)6次重復(fù)使用后,NiFe_2O_4對(duì)OXC的降解效率仍可以維持在88%左右;并且,PMS/NiFe_2O_4對(duì)濾后水和原水中的OXC也能進(jìn)行高效催化去除.這些試驗(yàn)結(jié)果表明PMS/NiFe_2O_4催化氧化體系對(duì)OXC等PPCPs的降解具有良好的應(yīng)用前景.
[Abstract]:Nickel ferrite (NiFe_2O_4) prepared by hydrothermal synthesis has been prepared to catalyze the production of free radicals by potassium persulfate (PMS) and degrade oxacepine (OXC). At room temperature and atmospheric pressure. The nickel ferrite catalyst was characterized by scanning electron microscope (SEM) X-ray powder diffraction (XRD) and hysteresis loop, and the effects of the dosage of PMS and the initial pH on the degradation efficiency of OXC were investigated. The results showed that increasing the dosage of PMS and NiFe_2O_4 and the neutral initial pH were beneficial to the degradation of OXC. By adding different kinds of quenching agents (methanol and tert-butanol), it is proved that OH and so _ 4- play an important role in the degradation of OXC, and so _ 4- plays a more important role in the degradation of OXC. In addition, further experiments showed that NiFe_2O_4 has good stability and reuse: after six times of repeated use, the degradation efficiency of OXC can still be maintained at about 88% by NiFe2O4, and the OXC in filtered water and raw water can also be effectively removed by PMS/ NiFeS2O4. These results show that PMS/NiFe_2O_4 catalytic oxidation system has a good application prospect for the degradation of PPCPs such as OXC.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;湖南大學(xué)建筑安全與節(jié)能教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：“十二五”國(guó)家科技支撐計(jì)劃資助項(xiàng)目(2012BAJ24B03)
【分類號(hào)】：X52;X703
本文編號(hào)：2162002
[Abstract]:Nickel ferrite (NiFe_2O_4) prepared by hydrothermal synthesis has been prepared to catalyze the production of free radicals by potassium persulfate (PMS) and degrade oxacepine (OXC). At room temperature and atmospheric pressure. The nickel ferrite catalyst was characterized by scanning electron microscope (SEM) X-ray powder diffraction (XRD) and hysteresis loop, and the effects of the dosage of PMS and the initial pH on the degradation efficiency of OXC were investigated. The results showed that increasing the dosage of PMS and NiFe_2O_4 and the neutral initial pH were beneficial to the degradation of OXC. By adding different kinds of quenching agents (methanol and tert-butanol), it is proved that OH and so _ 4- play an important role in the degradation of OXC, and so _ 4- plays a more important role in the degradation of OXC. In addition, further experiments showed that NiFe_2O_4 has good stability and reuse: after six times of repeated use, the degradation efficiency of OXC can still be maintained at about 88% by NiFe2O4, and the OXC in filtered water and raw water can also be effectively removed by PMS/ NiFeS2O4. These results show that PMS/NiFe_2O_4 catalytic oxidation system has a good application prospect for the degradation of PPCPs such as OXC.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;湖南大學(xué)建筑安全與節(jié)能教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：“十二五”國(guó)家科技支撐計(jì)劃資助項(xiàng)目(2012BAJ24B03)
【分類號(hào)】：X52;X703
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，本文編號(hào)：2162002
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