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Kieselguhr modified adsorption material and preparation method and application thereof

An adsorption material, diatomite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of low adsorption capacity, achieve simple preparation process, uniform loading, and improve adsorption performance Effect

Inactive Publication Date: 2011-06-15
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of known chemical reagents is that the adsorption capacity is low, and they can only partially remove soluble phosphate and other nutrients in water. Therefore, artificial synthesis and development of high-performance adsorption materials for removing eutrophication salts have attracted more and more attention.
The method of the present invention prepares diatomite modified adsorption material, and is applied to the adsorption of phosphorus in acidic eutrophic water bodies, and there is no report yet

Method used

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  • Kieselguhr modified adsorption material and preparation method and application thereof
  • Kieselguhr modified adsorption material and preparation method and application thereof
  • Kieselguhr modified adsorption material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Pretreat the surface of the diatomite carrier: soak the diatomite carrier in a mixed solution of hydrochloric acid and nitric acid with pH=0.01 at a ratio of solid-to-liquid mass ratio of 1:2, pickle for 2 hours under low-speed stirring, and pump Filter and rinse with distilled water until neutral, then dry at 110°C for 2 h, cool and put into sealed bags for later use;

[0033] (2) configure ferric chloride solution: take by weighing the ferric chloride of 16.25g, be dissolved in the water of 500ml and be configured into the ferric chloride solution that solubility is 0.2mol / L;

[0034](3) Prepare diatomite modified adsorption material by iron salt method: impregnate the diatomite carrier treated in step (1) into the ferric chloride solution in step (2), stir at a low speed to make it fully mixed, and control it at 70 ℃~80℃ for 24 hours, take it out and cool it to room temperature and wash off the unsupported iron oxyhydroxide particles with distilled water, then pu...

Embodiment 2

[0037] (1) Surface pretreatment of the diatomite carrier: operate according to the method in Example 1; wherein the surface of the diatomite carrier is pretreated: the diatomite carrier is soaked in the solid-liquid mass ratio of 1:5 In the mixed solution of hydrochloric acid and nitric acid with pH=0.5;

[0038] (2) configure ferric chloride solution: configure by the method in embodiment 1, FeCl 3 The concentration is 0.2mol / L;

[0039] (3) diatomite modified adsorption material prepared by iron salt method: operate according to the method in Example 1;

[0040] (4) Performance evaluation of diatomite modified adsorption material: Weigh 0.05g of the adsorption material in 7 times, place in 7 100mL Erlenmeyer flasks, add a solution with an initial phosphorus concentration of 2mg / L, and use HCl and KOH solutions in sequence Adjust the pH value of the phosphorus-containing solution to 3-9, put it into a constant temperature shaker, the rotation speed is 120r / min, the temperat...

Embodiment 3

[0042] (1) Surface pretreatment of the diatomite carrier: operate according to the method in Example 1, wherein the surface of the diatomite carrier is pretreated: the diatomite carrier is soaked in the solid-liquid mass ratio of 1:3 In the mixed solution of hydrochloric acid and nitric acid with pH=0.3;

[0043] (2) configure ferric chloride solution: configure by the method in embodiment 1, FeCl 3 The concentration is 0.2mol / L;

[0044] (3) diatomite modified adsorption material prepared by iron salt method: operate according to the method in Example 1;

[0045] (4) Performance evaluation of diatomite modified adsorption material: Weigh 0.05g of the adsorption material in 5 times, put it in five 100mL Erlenmeyer flasks, add a solution with an initial phosphorus concentration of 2mg / L, and adjust the pH value to about 6 , placed in 5 different constant temperature shakers, the temperature was set at 15°C, 20°C, 25°C, 30°C and 35°C in turn, the rotation speed was 120r / min, a...

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Abstract

The invention discloses a kieselguhr modified adsorption material and a preparation method and application thereof. The kieselguhr modified adsorption material is formed by directly loading ferric hydroxide solution on the acid-washed pretreated raw kieselguhr and drying the kieselguhr. Through the kieselguhr modified adsorption material, the modified kieselguhr micropores and the surface roughness are obviously changed, the specific surface area is enlarged by 10 times, H<+> of ferric hydroxide loaded on the kieselguhr has extremely strong affinity with O<2-> in the structure in the solution of low pH value range, and Fe<3+> is released to the solution, so that the solubility of the adsorption material is increased, the adsorption capacity is enhanced, and the adsorption material is suitable for decontamination research of meta-acid water and has potential application value in the treatment of eutrophic water of Pearl River valley. The preparation method for the kieselguhr modified adsorption material is convenient for operation, simple in process and low in cost. The kieselguhr modified adsorption material is convenient and practical in application.

Description

technical field [0001] The invention is a diatomite modified adsorption material and its preparation method and application, especially a diatomite modified adsorption material used for phosphorus removal in eutrophic water bodies and its preparation method and application, belonging to diatomite modification Modification technology of adsorbent materials and their preparation methods and applications. Background technique [0002] Since the 20th century, the discharge of industrial wastewater and domestic sewage, the increase in the use of chemical fertilizers, and the loss of fertilizers have caused eutrophication of water bodies. Eutrophication is a serious environmental problem facing the world today. In our country greater than 1Km 2 Of the more than 2,300 natural lakes in China, 24% are between eutrophication and high eutrophication, and 32% are between mesotrophication and eutrophication. From a global perspective, 30% to 40% of lakes and reservoirs have been affe...

Claims

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Application Information

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IPC IPC(8): B01J20/14B01J20/30C02F1/28C02F1/58
Inventor 彭进平姚煌余倩李俊程高
Owner GUANGDONG UNIV OF TECH
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