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An active filter material for manganese removal by catalytic oxidation in a water purification plant and its preparation method

A technology for catalytic oxidation and water purification plants, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc. The preparation speed is fast, the preparation method is simple, and the preparation cost is low.

Inactive Publication Date: 2018-07-17
HEFEI WATER SUPPLY GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an active filter material for catalytic oxidation manganese removal in water purification plants and its preparation method, so as to solve the problem of excessively long maturation period of the existing contact oxidation manganese removal filter and manganese sand expensive flaw

Method used

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  • An active filter material for manganese removal by catalytic oxidation in a water purification plant and its preparation method
  • An active filter material for manganese removal by catalytic oxidation in a water purification plant and its preparation method
  • An active filter material for manganese removal by catalytic oxidation in a water purification plant and its preparation method

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Embodiment 1

[0031] This embodiment provides an active filter material for manganese removal by catalytic oxidation in a water purification plant and a preparation method thereof, comprising the following steps:

[0032] (1) Acid etching: the particle size is d 10 =Coarse quartz sand of 0.9-1.2 mm is used as a raw material, and the quartz sand is soaked with 7.3% HCl for 48 hours for acid etching, taken out, and drained;

[0033] (2) Alkaline etching: the quartz sand after the treatment of step (1) is washed several times with a mass ratio of 1% NaOH solution, then soaked for 24 hours with a mass ratio of 4% NaOH solution, then the quartz sand is taken out, After washing with distilled water, draining or drying, place it in a muffle furnace, calcinate at 600°C for 2 hours in an air atmosphere, and cool naturally;

[0034] (3) Submerge the treated quartz sand in step (2) in MnSO with a concentration of 0.15mol / L 4 In the solution, soak for 2 hours, and keep stirring slowly during the soak...

Embodiment 2

[0039] This embodiment provides an active filter material for manganese removal by catalytic oxidation in a water purification plant and a preparation method thereof, comprising the following steps:

[0040] (1) Take 5kg of quartz sand and put it in a plastic bucket, its d 10 =0.9-1.2mm, immerse the quartz sand with 7.3% HCl solution for 48 hours, the HCl solution just submerges the quartz sand, after acid etching, take out the quartz sand and drain the liquid.

[0041] (2) washing the quartz sand after step (1) with a mass ratio of 1% NaOH solution for several times, and then immersing it in a 4% NaOH solution for 24 hours, the NaOH solution just submerged the quartz sand, after the immersion finished, Wash with distilled water several times, dry, and then calcined at 600°C for 2 hours, and cool naturally.

[0042] (3) Accurately add MnSO with a concentration of 0.15mol / L 4 1325ml of the solution is submerged in the quartz sand, soaked for 2 hours, and continuously stirred ...

Embodiment 3

[0050] This embodiment provides an active filter material for manganese removal by catalytic oxidation in a water purification plant and a preparation method thereof, comprising the following steps:

[0051] (1) Take 5kg of quartz sand and put it in a plastic bucket, its d 10 =0.9-1.2mm, immerse the quartz sand with 7.3% HCl solution for 48 hours, the HCl solution just submerges the quartz sand, after acid etching, take out the quartz sand and drain the liquid;

[0052] (2) washing the quartz sand after step (1) with a mass ratio of 1% NaOH solution for several times, and then immersing it in a 4% NaOH solution for 24 hours, the NaOH solution just submerged the quartz sand, after the immersion finished, Wash with distilled water several times, dry, and then calcined at 600°C for 2 hours, and cool naturally.

[0053] (3) Accurately add MnSO with a concentration of 0.15mol / L 4 1325ml of the solution is submerged in the quartz sand, soaked for 2 hours, and continuously stirred ...

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Abstract

The invention belongs to the technical field of drinking water treatment processes and specifically provides an active filter material for removing manganese by catalytic oxidation in a water treatment plant and a preparation method thereof. The method comprises the following steps: etching coarse quartz sand under acidic and alkaline conditions respectively; then oxidizing bivalent Mn<2+> into manganese oxide hydrate under a room-temperature reaction condition by utilizing KMnO4 and loading the manganese oxide hydrate on a quartz sand filter material. According to the preparation method provided by the invention, prepared oxide has very thin granularity and has a colloidal state; under a weak alkaline condition, the oxide is very easily attached to the surface of the quartz sand subjected to acid and alkali etching; the method is operated at room temperature and a product has abundant surface hydroxyls and good catalytic activity; when the product is used for treating source water with the average inlet water Mn<2+> concentration of 0.56mg / L, the average manganese removal rate reaches 90.4 percent. The active filter material provided by the invention is used for preparing an active filter membrane with a manganese catalytic oxidation capability; the preparation method is relatively simple and easy to operate and the filter material obtained by the preparation method has relatively good Mn<2+> catalytic oxidation activity.

Description

technical field [0001] The invention relates to the technical field of drinking water treatment technology, in particular to an active filter material used for manganese removal by catalytic oxidation in a water purification plant and a preparation method thereof. Background technique [0002] At present, the concentration of manganese in groundwater and surface water in many places exceeds the standard. Although manganese is an essential trace element for the human body, excessive manganese in production and domestic water will cause a series of problems: unpleasant color and odor in water. Spots form on sanitary ware, clothing, and industrial products; long-term drinking of high-manganese-containing water can cause a series of diseases, and existing epidemiological reports suggest that manganese can be harmful to the nerves; manganese can cause sediment accumulation in water distribution systems , when its concentration is above 0.20mg / l, manganese will often form a layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F101/20
CPCC02F1/725C02F2101/206
Inventor 施微杨妍唐玉朝黄明黄显怀葛绍阳乔龙君
Owner HEFEI WATER SUPPLY GRP CO LTD
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