A kind of method utilizing modified calcium-magnesium mineral material to treat formaldehyde waste water
A technology of mineral materials and formaldehyde wastewater, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high investment cost, large consumption of oxidant, etc., and achieve good treatment effect, Ease of operation and simple processing procedures
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[0032] In another preferred mode of the present invention, the preparation method of the above-mentioned modified calcium-magnesium mineral material may include the following steps: first, obtaining at least one calcium element with a mass fraction greater than or equal to 25% or a magnesium element with a mass fraction greater than or equal to 20% % mineral raw materials, crushing, grinding, and sieving the mineral raw materials to obtain calcium-magnesium mineral materials with a particle size of 50-500 mesh; secondly, immersing the calcium-magnesium mineral materials with a particle size of 50-500 mesh in an alkaline solution at a specified temperature; finally, The calcium-magnesium mineral material impregnated in the alkaline solution is washed to neutrality and subjected to subsequent treatment to produce a modified calcium-magnesium mineral material.
[0033] The aforementioned calcium-magnesium mineral material with a particle size of 50-500 mesh can be 50-100 mesh, 100...
Embodiment 1
[0044] (1) Take 200ml of formaldehyde wastewater water sample to be treated, and place it in a water bath at 35°C to preheat for 15 minutes;
[0045] (2) Weigh 0.2g of modified calcium-magnesium mineral material, add it to the preheated formaldehyde wastewater water sample, seal the container containing the formaldehyde wastewater water sample, place it in a water bath shaker at 40°C for 200min, and process After the completion, the formaldehyde wastewater is cooled to room temperature to obtain the treated formaldehyde wastewater.
[0046] Wherein, the preparation method of the modified calcium-magnesium mineral material is as follows: limestone (limestone from Shunze Mineral Products Processing Plant, Lingshou County) is pulverized, ground, and sieved to obtain calcium-magnesium mineral material with a particle size of 50-100 mesh, and the Immerse in 20mol / L potassium hydroxide aqueous solution for modification treatment, the solid-to-liquid mass ratio of calcium magnesium m...
Embodiment 2
[0049] (1) Take 200ml of formaldehyde wastewater water sample to be treated, and place it in a water bath at 80°C to preheat for 30 minutes;
[0050] (2) Weigh 1g of modified calcium-magnesium mineral material, add it to the preheated formaldehyde wastewater water sample, seal the container containing the formaldehyde wastewater water sample, and place it in a water bath shaker at 90°C for 30 minutes, and the treatment is completed Finally, the formaldehyde wastewater is cooled to room temperature to obtain the treated formaldehyde wastewater.
[0051] Among them, the preparation method of the modified calcium-magnesium mineral material is: crushing, grinding, and sieving olivine (magnesite ore from Hongqi magnesite mine in Pailou Town, Haicheng City, batch number HY-MGLS-041031) to obtain 100-200 mesh The calcium-magnesium mineral material of the particle size is modified by immersing it in 2mol / L sodium hydroxide aqueous solution. The solid-to-liquid mass ratio of calcium-ma...
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