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A method for preparing hexavalent chromium ion adsorbent using calla lily as raw material

A technology of calla lilies and raw materials, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem of low adsorption capacity of hexavalent chromium ions, etc., and achieve low production cost, few treatment steps, and high efficiency. remove effect

Active Publication Date: 2021-06-18
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of its material for hexavalent chromium ions is not high, and the maximum adsorption capacity is less than 10 mg / g

Method used

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  • A method for preparing hexavalent chromium ion adsorbent using calla lily as raw material
  • A method for preparing hexavalent chromium ion adsorbent using calla lily as raw material
  • A method for preparing hexavalent chromium ion adsorbent using calla lily as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Cut the calla lily plant into sections, freeze-dry it for later use, and obtain the Original AM;

[0045] (2) Pretreatment of calla lily: boil the freeze-dried calla lily (AM) in distilled water at 100°C for 12 hours to remove soluble organic matter, dry at 80°C for 12 hours to remove excess water, take the dried calla lily and add Stir in 100mL 10% NaOH solution, then place in 100mL 60% H 2 SO 4 Agitation in the solution removes hemicellulose and lignin, and exposes more surface functional groups. Rinse to neutrality with a large amount of distilled water, obtain pretreated calla lily (Pre-AM) after freeze-drying;

[0046] (3) Put 20mg of Pre-AM in tannic acid (TA) aqueous solution, the mass ratio of Pre-AM to TA is 1:1, and the concentration of TA is 4mg / mL. Tetraethylenepentamine (TEPA) was added dropwise under stirring, and the molar ratio of TA to TEPA was 1:3. Rinse with a large amount of distilled water after stirring at room temperature for 24 hours, and...

Embodiment 2

[0048] (1) cut the calla lily plant into sections, freeze-dry and set aside;

[0049] (2) Pretreatment of calla lily: boil the freeze-dried calla lily (AM) in distilled water at 100°C for 12 hours to remove soluble organic matter, dry at 80°C for 12 hours to remove excess water, take the dried calla lily and add Stir in 100mL 10% NaOH solution, then place in 100mL 60% H 2 SO 4 Agitation in the solution removes hemicellulose and lignin, and exposes more surface functional groups. Rinse to neutrality with a large amount of distilled water, obtain pretreated calla lily (Pre-AM) after freeze-drying;

[0050] (3) 20 mg of Pre-AM was placed in tannic acid (TA) aqueous solution, the mass ratio of Pre-AM to TA was 1:1, and the concentration of TA was 2 mg / mL. Tetraethylenepentamine (TEPA) was added dropwise under stirring, and the molar ratio of TA to TEPA was 1:3. Stir at room temperature for 24 hours, rinse with a large amount of distilled water, and freeze-dry to obtain Pre-AM-...

Embodiment 3

[0052] (1) cut the calla lily plant into sections, freeze-dry and set aside;

[0053] (2) Pretreatment of calla lily: boil the freeze-dried calla lily (AM) in distilled water at 100°C for 12 hours to remove soluble organic matter, dry at 80°C for 12 hours to remove excess water, take the dried calla lily and add Stir in 100mL 10% NaOH solution, then place in 100mL 60% H 2 SO 4 Agitation in the solution removes hemicellulose and lignin, and exposes more surface functional groups. Rinse to neutrality with a large amount of distilled water, obtain pretreated calla lily (Pre-AM) after freeze-drying;

[0054] (3) 20 mg of Pre-AM was placed in tannic acid (TA) aqueous solution, the mass ratio of Pre-AM to TA was 1:10 and the concentration of TA was 4 mg / mL. Tetraethylenepentamine (TEPA) was added dropwise under stirring, and the molar ratio of TA to TEPA was 1:1. Stir at room temperature for 24 hours, rinse with a large amount of distilled water, and freeze-dry to obtain Pre-AM-...

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Abstract

The present disclosure relates to a method for preparing a hexavalent chromium ion adsorbent by using calla lily as a raw material. (TEPA) was added into water, stirred and reacted for a period of time at room temperature, and dried to prepare the Pre-AM-P (TA-TEPA) composite adsorbent. The adsorbent prepared by the present disclosure uses the calla lily before and after pretreatment as a supporting structure to coat the polymer through strong intermolecular interactions. Dispersion, and greatly improved the adsorption capacity of hexavalent chromium ions of herbal plants represented by calla lily. This method can be applied to the treatment of chromium-containing wastewater, and has broad practical application prospects.

Description

technical field [0001] The disclosure belongs to the field of polymer composite material preparation, and mainly relates to a method for preparing a hexavalent chromium ion adsorbent by using calla lily as a raw material. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Due to the maturation of the chromium industry, the irregular discharge of chromium-containing wastewater has now become a more and more serious problem. As we all know, chromium ions mainly exist in the form of hexavalent chromium and trivalent chromium ions in water, and the biological toxicity of hexavalent chromium ions is much greater than that of trivalent chromium. However, a large amount of chromium-containing wastewater discharged from the chromium industry contains hexavalent chromium ions with greater biological toxicity. Therefore, it is of great practical value and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/24C02F1/28C02F101/22
CPCB01J20/24B01J2220/485C02F1/28C02F1/285C02F1/286C02F2101/22
Inventor 周国伟张真瑜高婷婷刘钦泽朱耿正
Owner QILU UNIV OF TECH
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