Method for efficiently removing butyl 4-hydroxybenzoate by using MWCNTs-persulfate system high-efficiency and application of method

The invention discloses a method for efficiently removing butyl 4-hydroxybenzoate (BPB) by using MWCNTs-persulfate (PS) system high-efficiency and application of the method. The method comprises the following steps of: (1) preparing a BPB target solution of which the pH value is 2.6-10.6, and the concentration is 1.0-10mg/L; (2) changing the experimental conditions, adding a certain amount of commercial MWCNTs and potassium hydrogen sulfate/sodium persulfate into the BPB target liquid, and placing to react at the room temperature; and (3) recycling and pretreating MWCNTs, and performing MWCNTs cyclic utilization experiment. The method shows for the first time that under the conditions that a relatively small amount of MWCNTs is used and the solution condition changes relatively greatly, the MWCNTs-PS composite system can rapidly and effectively remove BPB (greater than 98%). The method is simple in process procedure, easy to operate, low in equipment requirement, easily obtainable in MWCNTs material and easy