Water treatment method for adsorbing humic acid in water by metal organic framework HKUST-1

A HKUST-1, metal-organic framework technology, applied in the field of environmental engineering, can solve the problems of difficult recovery of catalysts and high processing costs, and achieve fast and efficient adsorption and good regenerative effects

Inactive Publication Date: 2021-05-07
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the removal of NOM by ozone-based advanced oxidation technology has the problem of generating aldehydes and carboxylic acid-based small molecule by-products, and the removal of NOM by ultraviolet-based advanced oxidation technology has problems such as high processing costs and difficult recovery of catalysts.

Method used

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  • Water treatment method for adsorbing humic acid in water by metal organic framework HKUST-1
  • Water treatment method for adsorbing humic acid in water by metal organic framework HKUST-1
  • Water treatment method for adsorbing humic acid in water by metal organic framework HKUST-1

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Experimental program
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Effect test

example 1

[0070] 1) Preparation of HKUST-1

[0071] HKUST-1 was prepared by solvothermal method.

[0072] 2) Preparation and determination of humic acid standard solution

[0073] Prepare a 1g / L humic acid standard stock solution, dilute it into a 1-20 mg / L humic acid use solution, and use an ultraviolet spectrophotometer to measure the humic acid concentration.

[0074] 3) The specific adsorption process is implemented according to the following steps

[0075] The dosage of HKUST-1 is 0.6g / L, under the conditions of temperature 298K, 313K and 333K, and oscillation intensity of 200r / min, place it in a water bath constant temperature oscillator for oscillation, absorb for 120min, and measure the adsorption equilibrium after passing through the membrane. Humic acid solution concentration Ce.

[0076] The Langmuir adsorption isotherm model can more accurately describe the adsorption process of humic acid by HKUST-1. The adsorption capacity of humic acid of HKUST-1 at 298K is 14.423mg / g...

example 2

[0078] 1) Preparation of HKUST-1

[0079] HKUST-1 was prepared by solvothermal method.

[0080] 2) Preparation and determination of humic acid standard solution

[0081] Prepare a 1g / L humic acid standard stock solution, dilute it into an 8mg / L humic acid use solution, and use an ultraviolet spectrophotometer to measure the humic acid concentration.

[0082] 3) The specific adsorption process is implemented according to the following steps

[0083] The dosage of HKUST-1 is 0.6g / L, the initial concentration of HA is fixed at 8mg / L, and the pH value of the solution is adjusted to 5. Under the condition of shaking intensity of 200r / min, adsorption of 2, 5, 20, 30, 40, 90 , 120, 240 and 400min after sampling, after passing through the membrane, measure the concentration of humic acid solution.

[0084] 10 minutes before the start of the reaction, the adsorption rate of HKUST-1 to humic acid is fast and linear, and the highest adsorption capacity can reach 5.856mg / g (298K), 6.74...

example 3

[0086] 1) Preparation of HKUST-1

[0087] HKUST-1 was prepared by solvothermal method.

[0088] 2) Preparation and determination of humic acid standard solution

[0089] Prepare a 1g / L humic acid standard stock solution, dilute it into a 5mg / L humic acid use solution, and use an ultraviolet spectrophotometer to measure the humic acid concentration.

[0090] 3) The specific adsorption process is implemented according to the following steps

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Abstract

The invention provides a water treatment method for adsorbing humic acid in water by using a metal organic framework material HKUST-1. An adsorption material 1,3,5-trimesic acid copper (HKUST-1) is prepared by adopting a solvothermal method, after the adsorption material HKUST-1 adsorbs a 5mg / L humic acid solution for 120 minutes under the conditions that the tempeature is 298K, the pH value of the solution is 5 and the dosage of the HKUST-1 is 0.6 g / L, the highest removal rate can reach 100%, and the adsorption capacity is 8.33 mg / g. The adsorption of the HKUST-1 on the humic acid accords with a Langmuir adsorption isotherm model, the HKUST-1 is monomolecular layer adsorption, and the theoretical saturated adsorption capacity can reach 16.385 mg / g. A quasi-secondary kinetic model can be used for well describing the adsorption kinetics of the HKUST-1 on the humic acid in the water. Adsorption of the HKUST-1 on humic acid is a spontaneous and disordered heat absorption process. A desorption regeneration result shows that the HKUST-1 has good reproducibility and can be repeatedly used. The application of HKUST-1 in water treatment can develop a new way for micro-pollution treatment of a surface water source with the characteristic of high content of traditional organic matter, and an ideal adsorption application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a water treatment method for absorbing humic acid in water by metal organic framework HKUST-1. [0002] technical background [0003] Humus acid (HA) is a supramolecular structure composed of small molecules with heterogeneous functions through weak hydrophobic interactions and hydrogen bonds. It can adsorb and complex with heavy metals to form organically bound pollutants, reducing water pollution. Self-cleaning ability. Humic acid is rich in active sites of halogenation reaction and is the main precursor of disinfection by-products (DBPs) in drinking water. So far, more than 700 DBPs have been identified in drinking water. Trihalomethanes (THMs) and haloacetic acids (HAAs) are the most important DBPs detected in drinking water, and their median concentration in mainland China is 10.53 μg / L and 12.67 μg / L. At the same time, humic acid also has a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/22B01J20/34B01J20/30C02F101/34C02F101/38
CPCC02F1/285B01J20/226B01J20/3475B01J20/3483B01J20/3425C02F2101/34C02F2101/38
Inventor 马晓雁王红王磊朱丽丹宋亚丽
Owner ZHEJIANG UNIV OF TECH
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