Applications of chitosan and chitosan derivative

The invention belongs to the technical field of ocean chemical engineering, relates to applications of chitosan and a chitosan derivative, and specifically relates to applications of chitosan and the chitosan derivative as fine particular matter scavengers. According to the invention, absorption characteristics of natural marine organism glycosaminoglycan-chitosan and the derivative are used for sedimentation of fine particular matters in the air; novel approach is provided for application of marine organism resources for land industrial; a novel method used for preventing and controlling haze is provided; it is beneficial for improving resident living environment, and improving human health; and the invention possesses significant social meaning.