Sustained-release material for black and odorous water body remediation and remediation method

Abstract

The invention relates to a sustained-release material for black and odorous water body remediation and a remediation method. A component A comprises the following components in percentage by mass: 50%of calcium nitrate tetrahydrate, 20% of cement and 30% of bottom mud; and a component B comprises the following components in percentage by mass: 50% of industrial-grade calcium peroxide, 20% of cement and 30% of bottom mud. A granular material is prepared from the component A and the component B. The slow-release material prepared by the invention is good in oxygen and calcium nitrate slow-release effect, convenient to prepare, long in action effect period and capable of effectively controlling black and odorous riverway water bodies. The required contents of the component A and component Bare calculated according to the pollution degree of the bottom mud, then the component A is uniformly injected into the bottom mud, and the component B is uniformly injected into the bottom mud after7-14 days of remediation. The method not only scientifically, economically and effectively solves the problem of black and odorous water, but also utilizes the bottom mud of the riverway to be repaired as a raw material for preparing the slow-release material to realize resource utilization of the bottom mud.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a slow-release material and a repairing method for repairing black and odorous water bodies; it is a method for water body repairing and resource utilization of polluted sediment. Background technique [0002] In recent years, the urbanization process has developed rapidly, but water pollution control measures and equipment treatment effects have lagged behind, resulting in the expansion of the scope of black and odorous water bodies, and the degree of black and odorous water bodies has also continued to intensify. Therefore, reducing the content of pollutants in sediment and controlling the release of pollutants in sediment have become the current research hotspots in water restoration. The main measures of sediment remediation include: biological method, chemical method and physical method. Compared with biological and physical methods, chemical me...

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Problems solved by technology

The three embedding agents all have a certain slow-release effect, but the addition of stearic acid and polyvinyl alcohol will increase the organic matter content of the water body, which is likely to cause secondary pollution

[0005] At the same time, currently about CaO 2 and Ca(NO 3 ) 2 There is a lack of relevant calculation and research on the dosage and dosage methods. Most of the research uses a small amount of multiple times, and the next dosage is determined based on the previous dosage effect, which may limit the application of this technology in industry.

At the same time, some studies lack the analysis of the nature of the water body, and the direct addition of chemical agents will not only easily cause waste of resources, but also cause secondary pollution

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