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Natural dye wastewater adsorbent and preparation and application method thereof

A dye wastewater and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of refractory degradation, deep color, high toxicity, etc., and achieve good effect, rich sources, and high speed fast effect

Inactive Publication Date: 2015-11-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These dye wastewaters are generally dark in color, highly toxic, and difficult to degrade, which have caused serious impacts on the surrounding environment and organisms; methylene blue is a representative compound of water-soluble dyes, a widely used cationic dye, and is used in industry to combine with zinc chloride The formed double salt is widely used for dyeing cotton, linen, paper and leather, but research has found that this dye and its metabolites have teratogenic effects, so the treatment of methylene blue wastewater has received extensive attention

Method used

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  • Natural dye wastewater adsorbent and preparation and application method thereof
  • Natural dye wastewater adsorbent and preparation and application method thereof
  • Natural dye wastewater adsorbent and preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0034] Take a certain amount of agricultural waste Zizania leaves, wash them with tap water and distilled water successively, dry them in a blast drying oven at 60°C for 36 hours, dry, crush and sieve, collect the particles below 50 meshes, and prepare Zizania leaves Adsorbent.

[0035]At room temperature, add 0.05g of Zizania leaves into 50ml, 120mg / L methylene blue solution, stir overnight with magnetic force, centrifuge, and measure the concentration of methylene blue solution after adsorption by visible spectrophotometer. The adsorption capacity was 44.61 mg / g, and the removal rate of methylene blue was 37.25%.

[0036] The experimental operation was repeated with the quality of the adsorbent as a single variable. The results showed that the adsorption capacity was 44.84 mg / g, 36.65 mg / g, 28.03 mg / g, 22.63mg / g, and 18.73mg / g, the methylene blue removal rates were 74.58%, 91.88%, 93.35%, 94.45%, and 93.77%, respectively. The experimental data are shown in Table 1.

[0037...

Embodiment 7-24

[0041] Take a certain amount of agricultural waste Zizania leaves, wash them with tap water and distilled water successively, dry them in a blast drying oven at 60°C for 36 hours, dry, crush and sieve, collect the particles below 50 meshes, and prepare Zizania leaves Adsorbent.

[0042] At room temperature, add 0.1g of Zizania leaves into 50ml, 50mg / L methylene blue solution, stir magnetically for 5min, centrifuge, and measure the concentration of methylene blue solution after adsorption by using visible spectrophotometer. The adsorption capacity was 17.58 mg / g, and the removal rate of methylene blue was 70.38%. The experimental operation was repeated with the adsorption time as a single variable until the adsorption equilibrium time was reached. It was found that when the adsorption time was 10 min, 30 min, 60 min, 120 min, and 180 min, the bamboo leaves The adsorption capacity is 18.95mg / g, 21.19mg / g, 22.53mg / g, 22.60mg / g, 22.51mg / g, and the removal rate of methylene blue is...

Embodiment 25-30

[0047] Take a certain amount of agricultural waste leaves, wash them with tap water and distilled water successively, dry them in a blast drying oven at 50°C for 48 hours, dry them, crush them, and sieve them, collect the particles below 50 meshes, and prepare Zizania leaves Adsorbent.

[0048] At 10°C, add 0.1g of Zizania leaves into 50ml, 100mg / L methylene blue solution, stir magnetically for 1h, centrifuge, and measure the concentration of methylene blue solution after adsorption by visible spectrophotometer. The adsorption amount was 40.59mg / g, and the removal rate of methylene blue was 81.26%. The experimental operation was repeated with temperature as a single variable. The amounts were 39.99mg / g, 38.40mg / g, 35.93mg / g, 34.61mg / g, 32.34mg / g, and the removal rates of methylene blue were 80.05%, 76.64%, 71.79%, 69.43%, 64.61%. The experimental data are shown in Table 3, and the influence of adsorption temperature on the process of adsorption of methylene blue solution by Z...

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Abstract

The present invention belongs to the technical field of dye wastewater adsorption, and in particular relates to a method for treating wastewater containing methylene blue by using agricultural waste Zizania aquatica leaf as an adsorbent. The method is as below: washing waste Zizania aquatica leaves with tap water and distilled water, drying, crushing, screening, and collecting particles less than 50 mesh as the adsorbent; and preparing an aqueous solution of methylene blue, adjusting the pH value of the aqueous solution of methylene blue to 2-12, adding the adsorbent, which has mass volume ratio to the aqueous solution of methylene blue of 1-6g / L, oscillating and adsorbing, wherein the adsorbent can sufficiently adsorb the methylene blue in the aqueous solution. The present invention has the following significant advantages: (1) the adsorbent Zizania aquatica leaf is an agricultural waste, and has rich source, inexpensive price and no toxicity and can be used without special treatment; and (2) the method for adsorption of methylene blue by Zizania aquatica leaves is simple and feasible, and has short adsorption time, easy separation of adsorbent and good adsorption effect.

Description

technical field [0001] The invention belongs to the technical field of dye wastewater adsorption, and in particular relates to a method for treating wastewater containing methylene blue by using agricultural waste water bamboo leaves as an adsorbent. Background technique [0002] With the rapid development of industry, the problem of environmental pollution caused by wastewater has become increasingly prominent. Among them, dyes are a common type of pollutants in wastewater. Dye wastewater contains acids, alkalis, salts, halogens, hydrocarbons, amines, nitro substances and Dyes and their intermediates and other substances, some also contain pyridine, cyanide, phenol, benzidine, and heavy metals such as mercury, cadmium, and chromium. These dye wastewaters are generally dark in color, highly toxic, and difficult to degrade, which have caused serious impacts on the surrounding environment and organisms; methylene blue is a representative compound of water-soluble dyes, a widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 朱琳王亚任启赟沈湘黔
Owner JIANGSU UNIV
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