Agricultural waste anion adsorbent and application thereof

An agricultural waste and anion technology, applied in the chemical and environmental fields, can solve the problems of high preparation temperature, complicated equipment, secondary pollution, etc., and achieve the effects of simple production process, wide source of raw materials and obvious economic benefits

Inactive Publication Date: 2012-10-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of high preparation temperature, complex equipment, and secondary pollution caused by large amount of organic matter in the prior art of the wheat straw amine salt anion adsorbent, and provides a kind of adsorbent prepared at normal temperature with little secondary pollution and good storage stability. and adsorption effect of wheat straw anionic adsorbent

Method used

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  • Agricultural waste anion adsorbent and application thereof
  • Agricultural waste anion adsorbent and application thereof
  • Agricultural waste anion adsorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of embodiment 1, (wheat straw) anionic adsorbent

[0023] The wheat straw stalks were cut into pieces about 10 cm in length, and the dirt and dust were washed with tap water. Wash and dry at 105°C for 24 hours; crush the wheat straw stalks, sieve them, and keep 40-100 mesh for later use.

[0024] (1) Take 15g of the above-mentioned wheat straw in a three-neck round bottom flask, add 250ml of NaOH (15wt%), stir and react at room temperature for 1h; add 100ml of epichlorohydrin, stir and react at 30°C for 3.5h; use the product Wash with deionized water and dry under vacuum at 60°C for 12 hours.

[0025] (2) Add the dried product to 120 mL of dimethylamine solution with a mass percent concentration of 40 wt %, stir and react at 30°C for 5 hours; wash the final product with deionized water, and dry it in vacuum at 60°C for 12 hours to obtain modified wheat straw Straw, ie anionic adsorbent (13 g).

[0026] The anionic adsorbent (modified wheat straw) prep...

Embodiment 2

[0027] Embodiment 2, the application of anionic adsorbent

[0028] The anionic adsorbent of Example 1 was used to decolorize the wastewater containing anionic dyes, and the initial concentration of dyes in the wastewater was 100 mg / L.

[0029] Process 1:

[0030] At room temperature, at a vibration speed of 140r / min, use acid to adjust the pH of the wastewater to 2.0, add an anion adsorbent so that the solid-liquid ratio of the adsorbent to the dye wastewater is 1.0g / L, shake for 60min, filter, and separate out the anion adsorption dose.

[0031] Process 2:

[0032] At room temperature, at a vibration speed of 140r / min, use acid to adjust the pH of the wastewater to 4.0, add an anion adsorbent so that the solid-liquid ratio of the adsorbent to the dye wastewater is 1.2g / L, shake for 90min, filter, and separate out the anion adsorption dose.

[0033] Process 3:

[0034] At room temperature, at a vibration speed of 140r / min, use alkali to adjust the pH of the wastewater to ...

Embodiment 3

[0054] Embodiment 3, the preparation of (wheat straw) anionic adsorbent

[0055] The wheat straw stalks were cut into 9cm-long fragments, and the dirt and dust were washed with tap water. Wash and dry at 105°C for 22 hours; crush the wheat straw stalks, sieve them, and keep 40-100 mesh for later use.

[0056] (1) Take 10 g of the above-mentioned wheat straw in a three-necked round-bottomed flask, add 150 mL of NaOH (15 wt %), and stir for 1 h at room temperature; add 60 ml of epichlorohydrin, and stir for 3.5 h at 30° C; Wash with deionized water and dry in vacuum at 60°C for 10h.

[0057] (2) Add the dried product to 100 mL of dimethylamine solution with a mass percent concentration of 40 wt%, and stir and react at 30°C for 5.5h; wash the final product with deionized water, and dry it in vacuum at 60°C for 12h to obtain the modified Wheat straw straw, ie anionic adsorbent (8.5 g).

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Abstract

The invention discloses an agricultural waste anion adsorbent and an application thereof. The agricultural waste anion adsorbent is prepared by adopting wheat straws, epichlorohydrin and dimethylamine as raw materials under the condition that alkaline media exist. Under the condition of room temperature and oscillation, pH value of waste water is adjusted to be smaller than or equal to 7.0, the anion adsorbent is added, and solid-to-liquid ratio of the adsorbent to dye waste water is enabled to be larger than or equal to 0.4 g / L. Oscillation time is not less than 30 minutes, and the anion adsorbent can be separated after filtration. The method has the advantages of simple process, low cost, economical, applicable and reproducible properties and the like. The adsorbent has the characteristics of good stability, good adsorption effect, wide applicable scope and the like, and can be widely applied to anion dye waste water treatment.

Description

technical field [0001] The invention relates to an anion adsorbent prepared by deep processing of agricultural waste and its application, belonging to the technical fields of chemistry and environment. Background technique [0002] Agricultural straw is a renewable biological resource with multiple uses. my country is a large agricultural country with abundant agricultural and sideline products, with many varieties and large quantities. According to the statistics of relevant departments, the total output of crop straw in my country exceeds 700 million tons, but the utilization rate of straw is very low in my country, only accounting for about 5%. After the crops are harvested, in order to ensure the land to be cultivated again, a large amount of crop stalks are burned, which not only wastes a lot of natural resources, but also pollutes the environment. At present, some agricultural wastes such as bagasse, peanut shells, apple pomace, sawdust, coconut shells, and banana pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24C02F1/28
Inventor 李倩钟倩倩岳钦艳高宝玉许醒王文懿
Owner SHANDONG UNIV
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