Ultra-trace recognition and removal of toxic chromium (VI) ions from water using visual mesocaptor

► An optical aluminosilica mesocaptor design of CrVI ion was achieved via a dense pattern of DPC probe. ► This mesocaptor approach creates removal responses with ion-revisable and -selective system. ► The visual detection of CrVI ion eliminates the necessity for instrument-dependent analysis. ► The captor model might develop a simple technique for wastewater treatment and management.