| abstract |
The invention discloses a porous magnetic ceramsite based on municipal sludge and a preparation method and application thereof, comprising the following raw materials in parts by weight: 100 parts of municipal sludge, 6-10 parts of bauxite, 4-8 parts of diatomite, powder 2-6 parts of coal ash, 0.01-0.1 part of cyclopentadienyl iron, 1-2 parts of magnesium lithium silicate, 0.1-1 part of iron nitrate, 0.1-0.3 part of cobalt nitrate, 0.1-1 part of nickel nitrate, pore making 1-3 parts of agent; its preparation method is as follows: (1) raw materials such as municipal sludge, bauxite are digested with acid; (2) ammonia water is adjusted to PH to 8.4-9.2, and nitrate is added to age; (3) pottery making Granular raw meal; (4) sintered ceramsite. The invention adopts a one-step method to directly prepare the porous ceramsite supported by magnetic nanometer Fe 2 O 3 /Co 3 O 4 /NiO, and does not need to be pre-impregnated with a composite precursor solution of iron salt, nickel salt and cobalt salt, and the method is simple and convenient to operate. , the loading capacity is higher, suitable for large-scale industrial production, and at the same time, the nanoparticles can be stably distributed in the ceramsite network structure to form a uniform system and avoid the delamination and shedding of the nanoparticles. |