Black and odorous water bottom mud in-situ remediation material and preparation method thereof

Abstract

The invention discloses a black and odorous water bottom mud in-situ remediation material and a preparation method thereof. The material is prepared from an oxygen release agent, an ammonia-nitrogen oxidant, aggregates, a binder, a pH regulator and a solidification regulator. The black and odorous water bottom mud in-situ reduction and solidification function material is prepared from the following steps that all raw materials are mixed to be uniform, granulation is conducted, or a mold is filled with chemicals, maintenance is conducted, and after the maintenance period is finished, the material can be obtained. Accordingly, the applied materials are easy to obtain and friendly to environment, preparation is easy, and the cost is low; meanwhile, oxygen slowly released from the chemicals and hypochlorite ions can improve the redox potential of black and odorous water, ammonia and nitrogen can be oxidized, sulfur release is inhibited, and remediation can be provided for the black and odorous water efficiently and enduringly.

Description

technical field [0001] The invention belongs to the field of water body treatment, and in particular relates to an in-situ restoration material for black and odorous water bottom mud and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and the improvement of industrialization, the excessive discharge of living and production wastewater has caused the eutrophication of the water body, and microorganisms consume oxygen in the water body and reproduce in large numbers, reducing the oxygen in the water body to the level of anoxic. In anoxic water, organic matter is anaerobically decomposed to form a large amount of sulfide, which makes the water black and smelly. The black and odorous water body not only leads to the destruction of the river ecosystem, but also seriously affects people's life. [0003] At present, there are two types of black and odorous water restoration methods commonly used: ex-situ restoration and in-situ res...

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Problems solved by technology

Patent CN102267788A discloses a nitrate slow-release material and its preparation method, aiming to use nitrate to repair black and odorous water bodies. Although nitrates can increase the redox potential of black and odorous water bodies, the dosage of nitrates is not easy to control, and it is easy to As a result of excessive dosing, water quality continues to deteriorate and biodiversity decreases; calcium peroxide, as a powdery solid, is easily dispersed when directly added into water, and has limited repairing effect on black and odorous water bodies, so the patent CN104560051A has announced a pollution The preparation method of the oxygen slow-release agent for site restoration, the oxygen-producing peroxide is wrapped with another chemical substance as the core, but the tertiary amine ion of the coating layer is a kind of surfactant, which may have negative ecological effects; and the patent CN102491502A The outer casing is made of environmentally friendly materials, but only peroxide is used as a single component to treat black and odorous water, which only plays the role of slow release of oxygen, and has limited effect on the restoration of black and odorous water; patent CN107572610A published a A kind of black and odorous water body treatment agent and its use method, but wherein adopts PAM, can produce acrylamide (AM) after hydrolysis, has neurotoxicity, the potential risk that is unfavorable to ecological environment

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