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Water treatment method using tourmaline as catalyst

A technology of tourmaline and catalyst, applied in the field of water treatment using tourmaline as a catalyst, can solve the problems of difficult process control, complicated wastewater treatment process, etc. Effect

Inactive Publication Date: 2006-10-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But using this method makes Fe in solution 2+ As the concentration increases, the treated water may be colored, and the treated water should be added with alkali to precipitate Fe 2+ ions and adjust the pH value of the solution, making the wastewater treatment process more complicated
At the same time, Fenton reagent treatment needs to be carried out under acidic conditions (pH=3.5), the process is not easy to control, and corrosion-resistant equipment is required, and Fe(OH) will be produced under medium-alkaline conditions 3 Precipitation, there are great limitations in practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The wastewater comes from coking wastewater after biochemical treatment of a steel group company. The main pollutant indicators are shown in Table 1.

[0023] Chroma (times)

[0024] Take 100ml of waste water, add 4.0g of tourmaline with a particle size of 200 mesh, stir at 25°C, slowly add 3ml of 30% H 2 o 2 solution, reacted for 150min and then filtered to measure the chromaticity, cyanide ion, fluoride ion and COD of the wastewater after treatment Cr , see Table 2.

[0025] Chroma (times)

[0026] Test results show that the present invention can remove 80.3% of COD in coking wastewater after biochemical treatment while effectively removing chroma Cr , 89.5% of ammonia nitrogen compounds, and effectively reduce the content of cyanide and fluoride ions.

Embodiment 2

[0028] Take 100ml of dye wastewater with a methylene blue concentration of 20mg / L, add 1.0g of tourmaline with a particle size of 400 mesh, stir at 60°C, and slowly add 1ml of 30%H 2 o 2 solution, measure the COD of methylene blue solution at different times, and obtain the COD removal rate see figure 1 .

Embodiment 3

[0030] Take 100ml of phenol solution with an initial concentration of 5mg / L, 10mg / L, 30mg / L, and 40mg / L, add 0.5g of tourmaline with a particle size of 2000 mesh, stir at 40°C, and slowly add 0.1ml of 30% H 2 o 2 solution, the removal rate of phenol was measured at different times, see figure 2 .

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Abstract

The invention discloses a water treatment process by using tourmaline as the catalyst, using hydrogen dioxide as oxidation agent, wherein the weight volumetric ratio of the tourmaline and the water to be treated is 0.5-4g : 100ml, the volumetric ratio of the 30% hydrogen peroxide solution and the water to be treated is 0.1-4g : 100ml, the treatment temperature being 25-60 deg. C.

Description

technical field [0001] The invention relates to a water treatment method using tourmaline as a catalyst. Background technique [0002] Source water, groundwater, surface water, and industrial wastewater contain various refractory organic pollutants, such as various pesticides, herbicides, and dyes, to varying degrees. The composition of these refractory organic substances is complex. If the water containing these organic substances is not treated or discharged up to the standard, it will not only pollute the water body, directly endanger human health, but also poison aquatic animals and plants, and destroy the water body and soil ecosystem. However, these organic substances are difficult to degrade under natural conditions or by microorganisms, and it is difficult to discharge them up to standard by traditional biochemical treatment; other physical treatment methods such as filtration, precipitation, and adsorption are only "pollution transfer" and will cause pollution. Sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 夏枚生胡彩虹张红梅宋保强
Owner ZHEJIANG UNIV
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