A high-efficiency improver for eutrophic water surface polluted sediment and its preparation method

Abstract

The invention discloses an efficient improver for polluted bottom mud on the surface layer of a eutrophic water body, and a preparation method of the efficient improver and relates to a polluted bottom mud improver. The improver comprises the main components in percentage by weight: 8 to 15 percent of iron mineral, 30 to 40 percent of clay mineral and 25 to 30 percent of quartz powder; the improver comprises the additional components in percentage by weight based on the sum of the main components: 5 to 8 percent of an activating agent, 1 to 5 percent of an adhesive and 5 to 10 percent of a filling agent. The method comprises the following steps: (1) weighing the main components according to the ratio, putting the main components in a reaction kettle to stir, adding the activating agent and reacting at normal temperature for 6 to 8 hours; (2) enabling the reactant to be pasty; (3) taking out the paste, adding the adhesive and the filling agent and performing pelleting; (4) drying damp granules at 50 to 60 DEG C; (5) polishing the dried materials, packaging and putting the materials into a storage; and (6) mixing the waste and the paste and pelleting again. The efficient improver for the polluted bottom mud on the surface layer of the eutrophic water body, and the preparation method of the efficient improver have the advantages that addition and mixing are adopted, so reasonable proportion of the effective components is guaranteed; the production process is simple; 'three wastes' are avoided in the preparation process; the production application process is simple; the urgent requirements of treatment and remediation of the polluted bottom mud on the surface layer of the eutrophic water body are effectively met.

Description

technical field [0001] The invention relates to a polluted bottom mud improver, in particular to a high-efficiency modifier for polluted bottom mud on the surface of eutrophic water bodies and a preparation method thereof, which is suitable for improvement and ecological restoration of polluted bottom mud on the surface of eutrophic water bodies. Background technique [0002] The invention and application of polluted sediment amendments and similar products are mainly accompanied by the development of endogenous control technology in the process of eutrophic water treatment and ecological restoration, and have a history of application in the past few decades. In the past, the control of sediment pollution in eutrophic water bodies mostly used sediment dredging or chemical and biological control, with the goal of improving the bottom habitat and inhibiting the release of endogenous pollutants into the water column. [0003] As far as chemical treatment is concerned, its goal ...

AI Technical Summary

Problems solved by technology

At present, there are some unsolvable problems in the treatment of polluted sediment by chemical substances, such as iron oxide and manganese oxide, etc., when improving the polluted sediment, due to the low utilization efficiency and large dosage, the reduced Iron and manganese are easily soluble in water, and oxidize on the surface of the water body to form precipitation, which affects the transparency of the water body and the natural landscape

Nitrate has a good effect in improving the oxidation-reduction potential of polluted sediment and eliminating black and odor, and the product is easy to obtain and low in price. The disadvantage is that special injection tools are required; the construction process is complicated, slow and the construction cost is high

However, due to factors such as low active ingredients, large dosage, high transportation costs, and inconvenient construction, it has not been widely used.

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