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 applicati

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] (1) Preparation of Chitosan Schiff Base

[0025] Weigh 2g of chitosan and anhydrous potassium carbonate in a four-necked flask, add 100mL of anhydrous methanol, turn on the thermostat stirrer, stir for 30 minutes at a constant temperature of 20°C and a rotation speed of 1500 rpm, and divide them into two parts. 7.5 mL of benzaldehyde was added (40 minutes apart), reacted for 20 hours, and the reaction solution was suction filtered to obtain a white solid powder. The white solid powder was extracted with about 100 mL of anhydrous methanol in a Soxhlet extractor in a 80°C constant temperature water bath for 6 hours, filtered with suction, washed twice with anhydrous ether, and dried at room temperature to obtain chitosan Schiff base.

[0026] (2) Preparation of sulfhydryl chitosan Schiff base

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

Example Embodiment

[0034] Example 2

[0035] Take the mercaptoaniline thiosemicarbazide chitosan modified zeolite prepared in Example 1, and test its adsorption of humic acid, phenol and nickel ions in wastewater.

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

[0037] Add 0.2g mercaptoaniline thiosemicarbazide chitosan modified zeolite, 0.2g chitosan and 0.2g zeolite to 100mL of 10mg / L humic acid solution, adjust the pH of the solution to about 7, 25℃ at 25℃ After 2.5 hours of constant-temperature ultrasonic oscillation, the absorbance was measured at 254nm, and the solution concentration was calculated according to the formula A=aCL, where: A: absorbance; a: absorption coefficient; C: concentration; L: width of the cuvette. According to the formula q=(C 0 -C e )V / m to calculate the adsorption capacity (q), where: C 0 , C e 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 the amount of...

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PUM

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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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