Repair material special for riverway bottom sediment pollution and preparation process thereof

Abstract

The invention relates to a repair material special for riverway bottom sediment pollution and a preparation process thereof. The repair material is prepared from, by weight, 20-30 parts of medical stone, 10-20 parts of zeolite powder, 6-12 parts of molecular sieve, 4-6 parts of sodium silicate, 7-11 parts of fiber ball filter material, 20-25 parts of bentonite, 6-10 parts of 2 mg / L polyacrylamide solution, 30-40 parts of saw dust, 10-20 parts of humus, 6-8 parts of compound flora and 60-80 parts of deionized water. The repair material is easy to obtain, medical stone and zeolite are rich in nutrition and release nutrition, the survival rate of organisms in water is improved, the surface is in a porous shape, heavy metal ions in the water are effectively adsorbed, probiotic breeding can be effectively performed by adopting the compound flora, hazardous substances, excessive sulfide and the like in water are removed and are cured with other substances on the surface, sludge is cleared from the inside, dissolved oxygen is effectively released, and required nutrients are provided for the organisms.

Description

technical field [0001] The invention relates to a special restoration material for river bottom mud pollution and a preparation process thereof. Background technique [0002] The sources of water pollution can be divided into internal sources and external sources. In the process of treating polluted water bodies, in addition to cutting off or controlling external source pollution, the impact of internal source pollution cannot be ignored. After the pollutants enter the water body, they will eventually be deposited in the bottom mud through precipitation, adsorption and other ways and accumulate gradually. Due to continuous enrichment and accumulation, the concentration of pollutants such as nitrogen, phosphorus, oxygen-consuming organic matter, and refractory organic matter in the sediment of the polluted water body is often an order of magnitude multiple of the concentration of each pollutant in the overlying water. The production of ammonia nitrogen, hydrogen sulfide, vol...

AI Technical Summary

Problems solved by technology

The physical control methods mainly include dredging method and covering method, which have the advantage of quick results, but the amount of engineering is large, the cost is high, and it is destructive to the benthic ecosystem. The dredging method also needs to consider the issue of sediment resettlement sites

The principle of the chemical method is that chemical reagents react with pollutants such as oxidation, reduction, precipitation, polymerization, etc., so that pollutants are separated from the sediment or transformed into a low-pollution or non-pollution state. cause secondary pollution