Microwave/UV-Vis/H2O2 Process for Environmental Remediation: Elimination of Phototransformation of Malachite Green (MG) into Leuco-Malachite Green (LMG)

摘要

Phototransformations of malachite green（MG) into leuco-malachite green（LMG) with UV-Vis irradiation from microwave-powered electrodeless discharge lamps（EDL) during MW/UV-Vis and MW/UV-Vis/H2O2 process were comparatively investigated. For gain insig-ht about the degradation courses during MW/UV-Vis-based and MW/UV-Vis/H2O2-based pr-ocesses，high performance liquid chromatogramphy-electrospray ionization-mass spectrometry（HPLC-ESI-MS)，gas chromatography-mass spectrometry（GC-MS) and high perfor-mance liquid chromatogramphy（HPLC) techniques were utilized to disclose degradation differences from two chosen criterions，as follows:（1) main intermediates and itsconcentration,（2) the proportion of primary courses after certain interval.