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Method for removing copper ions in vanillin production wastewater

A technology for producing wastewater and vanillin, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as being unsuitable for heavy metals, not well suited for copper ion removal, and unsatisfactory heavy metal adsorption effects. , to achieve the effect of fast removal, less secondary pollution and high treatment efficiency

Inactive Publication Date: 2018-09-28
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these commonly used adsorbents have many deficiencies, and cannot be well suited for the removal of copper ions in vanillin production wastewater.
For example, activated carbon and macroporous adsorption resin do not contain ion exchange groups, so the adsorption effect of heavy metals in water is not ideal.
Ion exchange resins are interfered by high background alkali metals and alkaline earth metals, and are not suitable for the removal of low concentrations of heavy metals in water

Method used

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  • Method for removing copper ions in vanillin production wastewater

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Embodiment 1

[0018] A method for removing copper ions in vanillin production wastewater, specifically comprising the following steps:

[0019] (1) Add sodium hydroxide to 1L of acidic vanillin wastewater after the main organic substances have been removed, and adjust the pH value to 7.5; the copper ion concentration in the vanillin wastewater is measured to be 48.64mg / L, and the sodium ion concentration is 92g / L, COD Cr It is 62mg / L.

[0020] (2) Preparation of thiacalixarene modified adsorption resin: Weigh 46.5 g of D-101 non-polar resin, wash it with deionized water three times, and dry it at 50°C for later use; weigh p-tert-butylthia Dissolve 3.5 g of calix[6]arene in 300 mL of chloroform, and oscillate ultrasonically for 1 hour to obtain a chloroform solution of p-tert-butylthiacalix[6]arene; p-tert-butylthiacalix[6]arene chloroform solution, stirred at 0°C for 24 hours, then separated by filtration, and dried at 50°C to obtain thiacalixarene-modified adsorption resin (the content ...

Embodiment 2

[0026] A method for removing copper ions in vanillin production wastewater, specifically comprising the following steps:

[0027] (1) Add sodium hydroxide to 1L of acidic vanillin wastewater after the main organic matter has been removed, and adjust the pH value to 8; the measured copper ion concentration in the vanillin wastewater is 52.23mg / L, and the sodium ion concentration is 95g / L, COD Cr It is 75mg / L.

[0028] (2) Preparation of thiacalixarene modified adsorption resin: Weigh 45.5 g of D-101 non-polar resin, wash it with deionized water three times, and dry it at 50°C for later use; weigh p-tert-butylthia Dissolve 4.5 g of calix[6]arene in 300 mL of chloroform, and oscillate ultrasonically for 1 hour to obtain a chloroform solution of p-tert-butylthiacalix[6]arene; add the dried D-101 non-polar resin to the above p-tert-butylthiacalix[6]arene chloroform solution, stirred at 0°C for 24 hours, then separated by filtration, and dried at 50°C to obtain thiacalixarene-mod...

Embodiment 3

[0034] A method for removing copper ions in vanillin production wastewater, specifically comprising the following steps:

[0035] (1) Add sodium hydroxide to 1L of acidic vanillin wastewater after the main organic substances have been removed, and adjust the pH value to 7.7; the copper ion concentration in the vanillin wastewater is measured to be 55.78mg / L, and the sodium ion concentration is 89g / L, COD Cr It is 82mg / L.

[0036] (2) Preparation of thiacalixarene modified adsorption resin: Weigh 45 g of D-101 non-polar resin, rinse with deionized water three times, and dry at 50°C for later use; weigh p-tert-butylthiacalixarene [6] Dissolve 5 g of arene in 300 mL of chloroform, and vibrate ultrasonically for 1 hour to obtain a chloroform solution of p-tert-butylthiacalix[6]arene; Butylthiacalix[6]arene chloroform solution, stirred at 0°C for 24 hours, then filtered and separated, and dried at 50°C to obtain thiacalixarene modified adsorption resin (the content of which is p...

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Abstract

The invention discloses a method for removing copper ions in vanillin production wastewater. The method disclosed by the invention comprises the following steps: regulating the pH value of vanillin production wastewater in which main organic matters are removed to be 7-8 by adopting alkaline matters; mixing a thiacalixarene modified polymeric adsorbent and vanillin wastewater according to a ratioof 10-15g to 1L according to different copper ion concentrations in the vanillin wastewater, stirring and reacting for 1-3 hours, wherein the removal rate of copper ions in the vanillin wastewater reaches 99% or higher, the concentration of the copper ions is decreased to 0.5mg / L or less, and an emission standard of national industrial wastewater is met. The method disclosed by the invention has the beneficial effects that the method is capable of realizing selective adsorption removal of heavy metal copper ions in the vanillin production wastewater under a high sodium-ion coexistence condition, has the characteristics of being high in treatment efficiency, less in secondary pollution, high in removal speed, capable of recycling adsorbing materials and the like, and meets green and environmental-friendly requirements.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for removing copper ions in vanillin production wastewater. Background technique [0002] Vanillin, a widely used edible spice, can be found in the seeds of vanilla, and can also be synthesized artificially. It has a strong milky aroma. Vanillin is an important spice and food additive, which is widely used in flavoring various foods and daily chemical products. Currently, the global annual usage has reached about 18,000 tons. The production of vanillin also produces a large amount of wastewater. The main pollutants in the wastewater include organic pollutants, sodium sulfate and copper ions. Cr 5000-6000mg / L, the concentration of sodium sulfate is 87-99g / L, and the concentration of copper ions is generally around 50mg / L. For different pollution factors, different technical methods need to be designed to remove them separately. The usual treatmen...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20C02F103/36
CPCC02F1/285C02F1/66C02F9/00C02F2101/20C02F2103/36
Inventor 胡晓钧刘敏敏毛海舫张滢曹钟林邹炳其
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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