degradation of isothiazolinone biocides in reverse osmosis concentrate by go/fe3o4/mgo nanocomposite

The presence of biocide, significant risks for humans, animals, and the environment. isothiazolinone biocides are the most commonly used non-oxidizing biocides in ro systems, and they have commonly been detected in ro concentrates. in this work, go/fe3o4/mgo nanocomposite was synthesized and fully characterized. the effect of pertinent factors (ph, the amount of catalyst, and organophosphate concentration) in the synthesis process was studied using a central composite design by response surface methodology. the band gap of the synthesized go/fe3o4/mgo nanocomposite appropriate for visible light photocatalytic activity. according to the obtained results, go/fe3o4/mgo photocatalyst showed more than 95% degradation efficiency for isothiazolinone as biocide. the magnetic characteristic of the synthesized photocatalyst helped its recovery from the solution after the reaction. according to the obtained data, go/fe3o4/mgo nanocomposite could degrade isothiazolinone (efficiency more than 90%) even after five consecutive runs. the go/fe3o4/mgo nanocomposite shows promising performance for catalytic degradation of isothiazolinone with the possibility to expand its application for other toxic chemicals removal.