An optimal study of the preparation conditions of urea-modified titanium ore adsorbent

摘要

The four main effect production factors,doping rate,calcination temperature,soaking time and heating rate,are chose to design experiments based on the orthogonal table L9(34) to prepare urea-modified titanium ore (UTO) sorbents.And the decoloration efficiency of methyl orange is examined by using UTO as sorbents under dark-state absorption.Based on the orthogonal experiments,we obtained the optimal operating parameters:urea 8.0wt％,soaking time 3h,calcination temperature 300℃ and heating rate 10℃/min.As the preparation condition was run at the optimal conditions,the decoloration efficiency of methyl orange reached 98.1％,which was significantly better than the undoped samples.Thus,it is feasible to treat dye wastewater by these UTO sorbents.