The invention belongs to the fields of micro-nano bubble preparation technologies and
water environment pollution treatment, and discloses a micro-nano bubble releasing material for repairing a
natural water body and a preparation method thereof. After the material is added into a target
water body, a large amount of micro-nano bubbles is generated in water, bulk phase micro-nano bubbles are dispersed in overlaying water, the
oxygen content of the overlaying water is quickly increased, in the interface, micro-nano bubbles are adhered on the material interface, and thus exist in the covering layer; micro-nano bubbles directly contact with anaerobic deposits, the
redox potential of the deposits-water interface is inverted for a long term, and the
surface layer deposits are passivated. By controlling the properties of the material, the micro-nano bubble releasing performance is regulated. The provided method for treating a
natural water body is ecologically safe and active for a long term, does not used any
chemical agent, is nontoxic and harmless, can relieve the
oxygen deficiency of the
natural water body, avoids the generation of black and
odor water, promotes the oxidation and degradation of
reducing substances in overlaying water, and creates good conditions for the ecological restoration of polluted water.