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Sulfydryl-phenyl thiosemicarbazide chitosan modified zeolite as well as preparation and applications thereof

A technology for modification of mercaptoaniline and chitosan, which is applied in other chemical processes, adsorption water/sewage treatment, chemical instruments and methods, etc., can solve problems such as low molecular weight and poor water solubility, and achieve good adsorption performance and high adsorption capacity The effect of increasing and reducing production costs

Inactive Publication Date: 2014-09-03
HUANGHUAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chitosan has good organic adsorption capacity, but its application is limited due to its low molecular weight and poor water solubility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of chitosan Schiff base

[0025] Weigh 2g of chitosan and anhydrous potassium carbonate respectively and place them in a four-necked flask, add 100mL of anhydrous methanol, turn on the constant temperature stirrer, stir for 30 minutes at a constant temperature of 20°C and at a speed of 1500 rpm, and divide into two total Add 7.5mL of benzaldehyde (with an interval of 40min in between), react for 20h, and filter the reaction solution with suction to obtain a white solid powder. Use about 100mL of anhydrous methanol to extract the white solid powder in a constant temperature water bath at 80°C for 6h in a Soxhlet extractor, filter it with suction, wash twice with anhydrous ether, and dry at room temperature to obtain chitosan Schiff base.

[0026] (2) Preparation of mercaptochitosan Schiff base

[0027] Put 0.1g of chitosan Schiff base into a four-necked flask, add 1.0g of anhydrous potassium carbonate, then add 10mL of distilled water and absolute ethano...

Embodiment 2

[0035] Get the mercaptophenylthiosemicarbazide chitosan-modified zeolite prepared in Example 1, and test its adsorption situation to humic acid, phenol and nickel ions in wastewater respectively.

[0036] (1) Adsorption of humic acid in wastewater

[0037] Add 0.2g of mercaptoanisemicarbazide chitosan modified zeolite, 0.2g of chitosan and 0.2g of zeolite to 100mL of 10mg / L humic acid solution, adjust the pH of the solution to about 7 at 25°C After ultrasonic oscillation at constant temperature for 2.5 hours, measure its absorbance at 254nm, and calculate the solution concentration according to the formula A=aCL, where: A: absorbance; a: absorption coefficient; C: concentration; L: width of cuvette. According to the formula q=(C 0 -C e )V / m to calculate the adsorption capacity (q), where: C 0 、C e Respectively, the concentration of the solution before and after adsorption (kg / m 3 ); V is the volume of the adsorption solution (mL); m is the amount of adsorbent (g); q is th...

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Abstract

The invention discloses sulfydryl-phenyl thiosemicarbazide chitosan modified zeolite as well as preparation and applications thereof, which belong to the technical field of wastewater treatment. According to the invention, phenylhydrazine and thiourea are introduced to chitosan especially by taking chloromethylthiirane as a crosslinking agent, and then the organic modified chitosan is loaded on zeolite so as to obtain novel sulfydryl-phenyl thiosemicarbazide chitosan modified zeolite. According to the invention, the application of a traditional method implemented by introducing a perchloric acid with extremely strong oxidability and corrosivity into thiocarbamide is avoided, and a broad-spectrum wastewater adsorbent with dual structure characteristics of zeolite and chitosan and good adsorption properties is developed; the production cost is greatly reduced; and a new thought and a new method are provided for the treatment of industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a chitosan-modified zeolite and its preparation and application. Background technique [0002] With the development of modern industry, water pollution has become one of the important problems faced by countries all over the world. Common wastewater treatment methods include: membrane filtration, flocculation, electrochemical method, oxidation method, biochemical method, adsorption method, etc. Among them, the adsorption method is very popular because of its simple operation, low cost, large processing capacity and no harmful substances. . Adsorbents commonly used in the past include diatomaceous earth, slag, fly ash, activated carbon, cellulose, resin, etc. At present, the adsorbents that have been studied more include carbon adsorbents, resin adsorbents, inorganic mineral adsorbents and natural polymer adsorbents. [0003] Zeolite is an important ino...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C08B37/08C02F1/28
Inventor 闫凤美潘庆才李荣强张敬华
Owner HUANGHUAI UNIV
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