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Tea residue composite adsorbent and preparation method thereof

A composite adsorption and tea dregs technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve problems such as short service life and unstable adsorption material performance, and achieve reduced water absorption and adsorption performance Excellent, effect of increasing adsorption performance

Inactive Publication Date: 2018-04-13
NANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogel composite material prepared by the invention has not undergone a cross-linking reaction, and the performance of the prepared adsorption material is unstable and the service life is short

Method used

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  • Tea residue composite adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A tea leaves composite adsorbent, made of the following raw materials in parts by weight: 60 parts of tea leaves, 42 parts of acrylic acid emulsion, 8 parts of nano calcium carbonate, 12 parts of polyethylene glycol, 8 parts of expanded perlite, 10% of 40 parts of sodium silicate solution, 5 parts of crosslinking agent, 0.2 part of initiator and 0.2 part of dibutyltin dilaurate.

[0025] Wherein the crosslinking agent is N, N-methylenebisacrylamide.

[0026] The particle size of the expanded perlite is 100 mesh; the initiator is sodium persulfate.

[0027] A preparation method of tea residue composite adsorbent, comprising the following steps:

[0028] (1) Pulverize the tea leaves to a particle size of 100 mesh, place them in high-temperature steam at 150°C for 60 minutes, add 2 times the weight concentration of 0.5mol / L sodium hydroxide solution and soak for 12 hours;

[0029] (2) Then add acrylic emulsion, crosslinking agent, initiator and dibutyltin dilaurate, stir...

Embodiment 2

[0032] A tea leaves composite adsorbent, made of the following raw materials in parts by weight: 65 parts of tea leaves, 40 parts of acrylic acid emulsion, 9 parts of nano calcium carbonate, 11 parts of polyethylene glycol, 9 parts of expanded perlite, 11% of 42 parts of sodium silicate solution, 6 parts of crosslinking agent, 0.25 part of initiator and 0.25 part of dibutyltin dilaurate.

[0033] Wherein the crosslinking agent is N, N-methylenebisacrylamide.

[0034] The particle size of the expanded perlite is 120 mesh; the initiator is benzoyl peroxide.

[0035] A preparation method of tea residue composite adsorbent, comprising the following steps:

[0036] (1) Pulverize the tea leaves to a particle size of 150 mesh, place them in high-temperature steam at 140°C for 70 minutes, add 2.2 times the weight concentration of 0.6mol / L sodium hydroxide solution and soak for 15 hours;

[0037] (2) Then add acrylic emulsion, crosslinking agent, initiator and dibutyltin dilaurate, s...

Embodiment 3

[0040] A tea leaves composite adsorbent, made of the following raw materials in parts by weight: 70 parts of tea leaves, 38 parts of acrylic acid emulsion, 10 parts of nano-calcium carbonate, 10 parts of polyethylene glycol, 10 parts of expanded perlite, 12% of 45 parts of sodium silicate solution, 7 parts of crosslinking agent, 0.3 part of initiator and 0.3 part of dibutyltin dilaurate.

[0041] Wherein the crosslinking agent is divinylbenzene.

[0042] The particle size of the expanded perlite is 150 mesh; the initiator is sodium persulfate.

[0043] A preparation method of tea residue composite adsorbent, comprising the following steps:

[0044] (1) Crush the tea leaves to a particle size of 200 mesh, place them in high-temperature steam at 130°C for 80 minutes, add 2.5 times the weight concentration of 0.7mol / L sodium hydroxide solution and soak for 18 hours;

[0045] (2) Then add acrylic emulsion, crosslinking agent, initiator and dibutyltin dilaurate, stir well and react...

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Abstract

The invention discloses a tea residue composite adsorbent and a preparation method thereof, and belongs to the field of adsorbing material preparation. The tea residue composite adsorbent is preparedfrom the following raw materials in parts by weight: 60-72 parts of tea residues, 32-42 parts of acrylic acid emulsion, 8-12 parts of nano calcium carbonate, 8-12 parts of polyethylene glycol, 8-12 parts of expanded perlite, 40-50 parts of a 10-13% sodium silicate solution, 5-9 parts of a crosslinking agent, 0.2-0.4 part of an initiator and 0.2-0.4 part of dibutyltin dilaurate. The prepared tea residue composite adsorbent has a high adsorption rate on heavy metal cations and organic matters such as methylene blue by modifying the tea residues, and is suitable for treating heavy metal pollutedwastewater or dye wastewater.

Description

technical field [0001] The invention relates to the technical field of adsorbent materials, in particular to a tea residue composite adsorbent and a preparation method thereof. Background technique [0002] Tea dregs are the waste of the tea industry. They are generally discarded or incinerated as garbage, which is not economical and causes environmental pollution to varying degrees. The utilization rate is relatively low. Tea residue itself has the advantages of being porous, large specific surface area, small specific gravity, etc., and has a certain affinity. Its main components, cellulose and lignin, contain a variety of active functional groups such as hydroxyl and carboxyl, which can be etherified, esterified, etc. chemical modification such as chemical modification, and the introduction of corresponding functional groups to increase its adsorption performance. In the prior art, there are also technical solutions for preparing adsorption materials by modifying plant f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20C02F101/36C02F101/38
CPCB01J20/043B01J20/10B01J20/106B01J20/24B01J20/262B01J2220/46C02F1/28C02F2101/20C02F2101/36C02F2101/38C02F2101/40
Inventor 宋伟张莉徐雪丽杨艳菊张丽
Owner NANYANG INST OF TECH
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