Filter medium for removing dioxin from water and preparation method for filter medium
A filter medium and dioxin technology, applied in the field of water treatment, can solve the problems of difficult biodegradation, complex process, difficult natural degradation and elimination of dioxin
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[0021] The invention discloses a preparation method of a filter medium for removing dioxins in water, comprising the following steps:
[0022] Under the protection of an inert gas, the mixture is molded in a mold press, then sintered at 160-220° C. for 50-80 minutes, cooled and demoulded to obtain a filter medium, and the mixture includes 300-500 parts by weight of activated carbon, 3 ~10 parts by weight of aluminum powder, 50~70 parts by weight of oleic acid modified titanium dioxide nanomaterials, 80~150 parts by weight of modified natural calcium carbonate, the modified natural calcium carbonate is natural calcium carbonate, carbon dioxide reaction product with oxalic acid.
[0023] The activated carbon used in the present invention is generally prepared as follows: charcoal prepared from plants such as peat, charcoal, wood, coconut shells and petroleum is activated by high-temperature pyrolysis in steam containing oxidizing gas, and then cleaned and dried by inorganic pick...
Embodiment 1
[0038] At 55°C, react limestone with carbon dioxide and oxalic acid to obtain modified limestone with a specific surface area of 50m 2 / g;
[0039] Under the protection of argon, weigh 400g with a specific surface area of 1200m 2 / g of medical wood activated carbon, 3g of aluminum powder with a particle size of 200 meshes, 50g of oleic acid-modified titanium dioxide nanomaterials and 120g of modified limestone particles were placed in a mixer and stirred for 120 minutes, and the removed part was loaded into a tubular mold and pressed , sintered at 200° C. for 60 minutes, and demolded after cooling to obtain a filter element.
Embodiment 2
[0041] At 55°C, react limestone with carbon dioxide and oxalic acid to obtain modified limestone with a specific surface area of 50m 2 / g;
[0042] Under the protection of argon, weigh 300g with a specific surface area of 1200m 2 / g of medical wood activated carbon, 3g of aluminum powder with a particle size of 200 meshes, 50g of oleic acid-modified titanium dioxide nanomaterials and 120g of modified limestone particles were placed in a mixer and stirred for 120 minutes, and the removed part was loaded into a tubular mold and pressed , sintered at 200° C. for 60 minutes, and demolded after cooling to obtain a filter element.
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Abstract
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