Compound water treatment agent based on ferrate and preparation method of compound water treatment agent

A ferrate and water treatment technology, which is applied in the direction of special compound water treatment, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of weak oxidation performance, narrow application range, poor sustainability, etc., and improve the oxidation capacity , broaden the pH range, improve the solubility of the effect

Active Publication Date: 2016-09-07
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problems of poor stability, weak oxidation performance and poor sustainability, narrow application range, large dosage of chemicals used, residual hydrogen peroxide easily causing sludge to float up, and high iron salt content in sludge, etc., existing water treatment chemicals, the present invention Provided is a ferrate-based composite water treatment agent and a preparation method thereof. The preparation method has a high utilization rate of raw materials, the active ingredient ferrate in the composite agent has good stability, and the agent is used in combination with hydrogen peroxide. Continuous, greatly improves the biodegradability of wastewater, and has good decolorization and adsorption and flocculation performance, which can effectively reduce the chromaticity of wastewater and the content of heavy metal ions such as Cd, Cr, Pb, etc. Low content of iron salts in sludge

Method used

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  • Compound water treatment agent based on ferrate and preparation method of compound water treatment agent
  • Compound water treatment agent based on ferrate and preparation method of compound water treatment agent
  • Compound water treatment agent based on ferrate and preparation method of compound water treatment agent

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Proportion of raw materials by weight: 18 parts of sodium hydroxide, 15 parts of potassium hydroxide, 10 parts of sodium hypochlorite, 15 parts of ferric nitrate, 1 part of copper chloride, 30 parts of disodium edetate, 18 parts of calcium chloride , the step of preparing compound water treatment agent is: take each component by the ratio described above, sodium hypochlorite is prepared into a 10% (mass fraction) solution, then sodium hydroxide solid is added in the 10% sodium hypochlorite solution , stir, then add ferric nitrate solid and stir to dissolve; add copper chloride solid and edetate disodium solid to the solution, and stir until completely dissolved; add potassium hydroxide solid to the solution, precipitate for 15 minutes after stirring, and pump The filter cake was obtained by filtration, dried at 70°C for 1 hour, and recorded as solid A; the pH of the filtrate was adjusted to 8.0 with sulfuric acid, and calcium chloride was prepared into a saturated soluti...

Embodiment 2

[0041] Proportion of raw materials by weight: 19 parts of sodium hydroxide, 18 parts of potassium hydroxide, 12 parts of sodium hypochlorite, 16 parts of ferric nitrate, 2 parts of copper chloride, 33 parts of disodium edetate, 19 parts of calcium chloride The steps for preparing the composite water treatment agent are basically the same as in Example 1, except that the pH of the solution is adjusted to 8.5 with nitric acid, and the drying condition of the filter cake is 40 minutes at 80° C.

Embodiment 3

[0043] Proportion of raw materials by weight: 20 parts of sodium hydroxide, 20 parts of potassium hydroxide, 14 parts of sodium hypochlorite, 17 parts of ferric nitrate, 3 parts of copper chloride, 34 parts of disodium edetate, 20 parts of calcium chloride , the steps of preparing the composite water treatment agent are basically the same as in Example 1, except that the pH of the solution is adjusted to 8.0 with nitric acid, and the drying condition of the filter cake is 60° C. for 1 hour.

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Abstract

The invention discloses a compound water treatment agent based on ferrate and a preparation method of the compound water treatment agent, and belongs to the field of industrial wastewater treatment. The compound water treatment agent is prepared from the following raw materials: 18-20 parts of sodium hydroxide, 15-20 parts of potassium hydroxide, 10-15 parts of sodium hypochlorite, 15-18 parts of ferric nitrate, 1-3 parts of copper chloride, 30-35 parts of ethylene diamine tetraacetic acid and 18-20 parts of calcium chloride. The prepared water treatment agent is good in stability and high in oxidability, has the characteristics that the oxidizing capacity is continuous, the decolourising property is good, the pH application range is wide, the added amounts of acid, base and chemicals are small, sludge is unlikely to float and the content of ferric salt in the sludge is relatively low, and has adsorption and flocculent precipitation performance, so that the heavy metals such as Cd, Cr and Pb in industrial wastewater can be effectively removed, and the biodegradability of the wastewater is greatly improved.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and more specifically relates to a ferrate-based composite water treatment agent and a preparation method thereof. Background technique [0002] With the expansion of my country's industrial scale and industrial types, a large amount of industrial wastewater is produced in the production process. Especially in petroleum, chemical industry, electrolysis, printing and dyeing, textile and other industries, not only the discharge of wastewater is large, but also the physical and chemical properties of wastewater are complex. A lot of industrial wastewater has high COD, high chroma, contains a variety of heavy metals, and the BOD / COD value is very low, resulting in poor biodegradability of wastewater, so that biological methods cannot be directly applied to the treatment of these industrial wastewater. For this type of industrial wastewater that is difficult to biodegrade, chemical oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/52
CPCC02F1/5236C02F1/72C02F1/722C02F2305/026
Inventor 刘波孙信柏梁子姚芳侯翔宇王德鹏丁新春
Owner NANJING UNIV
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