The cotton template Zn/Ti/Fe layered double oxide (YLDO) and Zn/Ti/Fe layered double oxide (NLDO) were prepared by coprecipitation-baking method. The adsorbents were characterized by SEM

N2 adsorption

FTIR and XRD. The adsorption mechanism of nitrate on YLDO and NLDO in water and the regeneration mechanism of ultraviolet photocatalytic were investigated. The results showed that using cotton as template

the specific surface area of YLDO increased to 74.8 m2·g-1

and the number of large pores increased. The C element is introduced into the chemical composition

which enhances the adsorption capacity. The magnetic materials are composed to magnetic separation. The equilibrium adsorption capacity of YLDO is 66.57 mg·g-1 at 298 K and pH of 7

which is 22.6% higher than that of NLDO. The adsorption isotherms of nitrate on YLDO and NLDO can be described better with Langmuir equation model than Freundlich model

and the pseudo-second-order kinetics equation fit well with the adsorption data. The adsorption process for nitrate on YLDO and NLDO are exothermic and spontaneous. The saturated YLDO and NLDO can be regenerated under ultraviolet light

which keep high adsorption capacity after five cycles for continuous adsorption and regeneration. YLDO can effectively remove nitrate from water by adsorption-magnetic separation-ultraviolet photocatalytic regeneration process without secondary pollution and has potential application prospects in nitrate wastewater treatment.