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Enzyme imitation type water treatment agent for degrading polycycic/heterocyclic aromatic hydrocarbon, and preparation method for enzyme imitation type water treatment agent

The technology of a water treatment agent and heterocyclic aromatic hydrocarbons is applied in the field of imitative enzyme type water treatment agent and its preparation, and achieves the effects of reducing loss, improving removal efficiency and high removal efficiency.

Inactive Publication Date: 2012-02-15
WUHAN UNIV OF SCI & TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Nanomagnetic catalysts are mainly concentrated in goethite (α-FeOOH) and maghemite (γ-Fe 2 o 3 ), while for magnetite (Fe 3 o 4 ) degradation of polycyclic aromatic hydrocarbons and heterocyclic aromatic hydrocarbons has not been reported

Method used

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  • Enzyme imitation type water treatment agent for degrading polycycic/heterocyclic aromatic hydrocarbon, and preparation method for enzyme imitation type water treatment agent
  • Enzyme imitation type water treatment agent for degrading polycycic/heterocyclic aromatic hydrocarbon, and preparation method for enzyme imitation type water treatment agent
  • Enzyme imitation type water treatment agent for degrading polycycic/heterocyclic aromatic hydrocarbon, and preparation method for enzyme imitation type water treatment agent

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preparation example Construction

[0027] An enzyme-like water treatment agent for degrading poly / heterocyclic aromatic hydrocarbons and a preparation method thereof. The steps of its preparation method are as follows:

[0028] Step 1. Mix bentonite: deionized water according to the mass ratio of 1: (30-40), put it in the reaction kettle, stir for 20-40min under the conditions of 20-30°C and 60-150r / min, and let it stand After 8-12 hours, remove the upper layer, take the middle layer, then dry at 70-90°C for 5-6 hours, and crush to obtain purified bentonite.

[0029] Step 2. Mix the purified bentonite: sodium chloride solution evenly in a mass ratio of 1: (1-1.5), place it in another reaction kettle, and put it in a constant temperature water bath at 70-90°C and under the condition of 60-150r / min Stir for 30-60 minutes; then conduct liquid-solid separation to obtain a solid, wash the solid with deionized water until there is no chloride ion; then dry and grind at 100-120°C, and pass through a 200-mesh sieve to...

Embodiment 2

[0039] An enzyme-like water treatment agent for degrading poly / heterocyclic aromatic hydrocarbons and a preparation method thereof. The steps of its preparation method are as follows:

[0040] Step 1. Mix bentonite: deionized water according to the mass ratio of 1: (40-50), put it in the reaction kettle, stir for 20-40min under the conditions of 20-30°C and 60-150r / min, and let it stand After 8-12 hours, remove the upper layer, take the middle layer, then dry at 70-90°C for 5-6 hours, and crush to obtain purified bentonite.

[0041] Step 2. Mix the purified bentonite: sodium chloride solution evenly in a mass ratio of 1: (1.5-2.0), place it in another reaction kettle, and put it in a constant temperature water bath at 70-90°C and under the condition of 60-150r / min Stir for 30-60 minutes; then conduct liquid-solid separation to obtain a solid, wash the solid with deionized water until there is no chloride ion; then dry and grind at 100-120°C, and pass through a 200-mesh sieve ...

Embodiment 3

[0052] An enzyme-like water treatment agent for degrading poly / heterocyclic aromatic hydrocarbons and a preparation method thereof. The steps of its preparation method are as follows: step 1, mix bentonite: deionized water in a mass ratio of 1: (50-60), place it in a reaction kettle, and heat it under the conditions of 20-30°C and 60-150r / min Stir for 20-40 minutes, stand still for 8-12 hours, remove the upper layer, take the middle layer, then dry at 70-90 °C for 5-6 hours, and crush to obtain purified bentonite.

[0053] Step 2. Mix the purified bentonite: sodium chloride solution evenly in a mass ratio of 1: (2.0-2.5), place it in another reaction kettle, and put it in a constant temperature water bath at 70-90°C and under the condition of 60-150r / min Stir for 30-60 minutes; then conduct liquid-solid separation to obtain a solid, wash the solid with deionized water until there is no chloride ion; then dry and grind at 100-120°C, and pass through a 200-mesh sieve to obtain s...

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Abstract

The invention relates to an enzyme imitation type water treatment agent for degrading polycycic / heterocyclic aromatic hydrocarbon, and a preparation method for the enzyme imitation type water treatment agent. The technical scheme comprises the following steps of: uniformly mixing bentonite and deionized water in a mass ratio of 1:(30-60), standing, and taking an intermediate layer to obtain purified bentonite; mixing the purified bentonite and NaCl in a mass ratio of 1:(1-2.5), and stirring for 30 to 60 minutes to obtain sodium-activated bentonite; adding 1.5 to 5.0 weight percent of sodium-activated bentonite slurry into an aluminum crosslinker until the volume ratio of the sodium-activated bentonite slurry to the aluminum crosslinker is (4-7):1 to obtain aluminum pillared bentonite; andmixing aluminum pillared bentonite, deionized water, and hexadecyltrimethylammonium bromide in a mass ratio of 1:(40-100):(0.1-0.4), adding ferrous sulfate and ferric trichloride until the molar ratio of Fe<2+> to Fe<3+> is 1:(1.5-3), introducing nitrogen, stirring at the temperature of between 60 and 80 DEG C for 10 and 15 minutes, and adjusting pH to be 9 to 12 to obtain the enzyme imitation type water treatment agent for degrading polycycic / heterocyclic aromatic hydrocarbon. The enzyme imitation type water treatment agent has the advantages of high removal efficiency, low cost and environment-friendliness, and can be recycled.

Description

technical field [0001] The invention belongs to the technical field of water treatment agents. In particular, it relates to an enzyme-like water treatment agent for degrading poly / heterocyclic aromatic hydrocarbons and a preparation method thereof. Background technique [0002] Coking wastewater is a kind of organic industrial wastewater with large volume and complex chemical composition that is difficult to treat. It contains a variety of organic substances and inorganic salts that are difficult to be degraded by microorganisms and are highly toxic. If discharged into water bodies, it will cause serious water pollution. and ecotoxicity. However, the current treatment methods fail to efficiently deal with the refractory organic matter in such water bodies, or part of it can be achieved but will produce secondary new pollution, which seriously affects the regeneration and recycling of this type of wastewater. [0003] The traditional treatment of coking wastewater adopts th...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30B01J23/745C02F1/58C02F1/72C02F1/28
Inventor 王光华李文兵陈坤刘文敏刘向勇常红兵鲁云洲
Owner WUHAN UNIV OF SCI & TECH
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