Effect Of Acid Modification Of Kaolinite On Nano Zero-valent Iron Loading And Its Microwave Degradation Of Antibiotics In Water

Antibiotic pollution has become more and more serious in recent years,which has aroused widespread concern in society,it is great significance to find effective methods for removing antibiotics.In this paper,kaolinite was acid-modified,loading nano zerovalent iron on modified kaolinite,removal of antibiotics under microwave irradiation.Mainly achieved the following results:1.The effect of acid modification on the surface acidity and chemical composition of kaolinite was studied.The results show that sulfuric acid solution has a better modification effect on kaolinite,modified temperature of kaolinite is the main factor affecting the modification effect of kaolinite.2.The effect of acid modification on the loading of nano zero-valent iron on kaolinite was discussed.It is found that the acid modification of kaolinite can uniformly disperse nano zero-valent iron on the modified kaolinite and inhibit the agglomeration of nano zero-valent iron,the nano zero-valent iron specific surface area is greatly increased,and the reactivity of the nano zero-valent iron is improved.The active sites generated by acid-soluble aluminum and the Zeta potential of modified kaolinite can affect the loading of nano zero-valent iron,the active site generated by the acid-soluble aluminum element is the main factor.3.Under microwave irradiation,the tetracycline in the water was removed by the prepared composite material,the effects of reaction time and microwave power on the loading of nano zero-valent iron and the removal of tetracycline were investigated.It is found that acid modification can effectively increase the loading of nano zero-valent iron,and the higher the modification temperature,the higher the loading,and the better the tetracycline removal rate.