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Modified waste tea leaves absorbent and preparation method and application thereof

A tea dregs and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, textile industry wastewater treatment, etc., can solve the problems of waste of resources, seldom use of tea dregs, pollution of the environment, etc., to reduce pollution, Remarkable removal effect, no secondary pollution effect

Active Publication Date: 2013-11-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China is a big tea planting country. In 2012, China’s tea output was 1.915 million tons, but the tea dregs produced after drinking tea are rarely used, and most of them are directly discarded, which not only causes a waste of resources but also pollutes the environment.

Method used

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  • Modified waste tea leaves absorbent and preparation method and application thereof
  • Modified waste tea leaves absorbent and preparation method and application thereof
  • Modified waste tea leaves absorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Soak a certain quality of green tea in boiling water for 2 hours (6 times of soaking), take out the tea leaves and rinse them with distilled water for several times, then mix the waste tea leaves and hydrochloric acid solution according to the weight of waste tea leaves (g): the volume of hydrochloric acid solution (mL) Soak it in a Erlenmeyer flask with a ratio of 1:100, in which the concentration of hydrochloric acid solution is 0.10mol / L, vibrate (150 rpm) in a constant temperature water bath shaker at 20°C for 24 hours, filter and separate, and wash the filter residue with distilled water until The pH is neutral and dried (dried or freeze-dried) to obtain the modified waste tea dregs adsorbent.

Embodiment 2

[0028] Soak a certain quality of green tea in boiling water for 2 hours (7 times of soaking), take out the tea leaves and rinse them with distilled water for several times, then mix the waste tea leaves and hydrochloric acid solution according to the weight of waste tea leaves (g): the volume of hydrochloric acid solution (mL) Soak it in a conical flask at a ratio of 1:60, in which the concentration of hydrochloric acid solution is 0.15mol / L, vibrate (120 rpm) in a constant temperature water bath shaker at 25°C for 24 hours, filter and separate, and wash the filter residue with distilled water until The pH is neutral and dried (dried or freeze-dried) to obtain the modified waste tea dregs adsorbent.

[0029] Take 1g of the modified waste tea residue adsorbent and add it to the active brilliant blue KN-R solution with a solution pH of 1.0, 2.0, 3.0, 5.0, 7.0, 9.0, 11.0, 50mL55mg / L, and place in a constant temperature water bath shaker at 20°C After medium shaking (150 rev / min) ...

Embodiment 3

[0035] Soak a certain quality of green tea in boiling water for 2 hours (8 times of soaking), take out the tea leaves and rinse them with distilled water for several times, then use the waste tea leaves and hydrochloric acid solution according to the weight of waste tea leaves (g): the volume of hydrochloric acid solution (mL) Soak it in a Erlenmeyer flask with a ratio of 1:40, in which the concentration of hydrochloric acid solution is 0.25mol / L, vibrate (150 rpm) in a constant temperature water bath shaker at 30°C for 20 hours, filter and separate, and wash the filter residue with distilled water until The pH is neutral and dried (dried or freeze-dried) to obtain the modified waste tea dregs adsorbent.

[0036] Take 0.20, 0.40, 0.60, 0.80, and 1.00 of the modified waste tea residue adsorbents, respectively, and add them to 50 mL of reactive brilliant blue KN-R solutions with a pH of 1.0 and 50 mg / L, and vibrate in a constant temperature water bath shaker at 20°C (150 rev / min...

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Abstract

The invention discloses a modified waste tea leaves absorbent and a preparation method and an application thereof, and belongs to the technical field of absorbents. The absorbent is the waste tea leaves absorbent being subject to hydrochloric acid modification processing. The preparation method comprises the following steps: selecting and using waste green tea dreg after the tea is made; taking a certain amount of waste tea leaves, and cleaning repeatedly, and soaking the tea leaves in a hydrochloric acid solution for 12-24 h; separating through filtration; cleaning the filter residue until the pH is neutral, and drying. The absorbent provided by the invention is used for removing reactive brilliant blue KN-R in the waste water. The method has the advantages of simplicity in operation, low cost, and environmental friendliness, and provides a new resource utilization way for the waste tea leaves.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, and relates to a method for removing active brilliant blue KN-R in wastewater by using an adsorbent, in particular to a method for removing active brilliant blue KN-R in wastewater by using a modified waste tea dregs adsorbent . Background technique [0002] In recent years, synthetic dyes have been widely used in textiles, leather, plastics, paper and other industries, producing about 7×10 5 ~1×10 6 tons of synthetic dyes, 10-20% of which are discharged into the environment during production and use. Due to the characteristics of stable chemical structure and refractory degradation of dyes, it brings serious harm to the ecological environment. In recent years, pollutant discharge standards have become increasingly stringent. Dye wastewater must be properly treated before it can be discharged. Not only must the high content of COD, ammonia nitrogen and suspended particles in the wastewater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/32C02F1/28C02F103/30
Inventor 高景峰司春英
Owner BEIJING UNIV OF TECH