Methylene blue dye adsorbent and preparation and application method thereof

A methylene blue dye, methylene blue technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc., can solve the problems of less research and utilization of longan shells, and no reasonable utilization of longan shells, and achieve fast adsorption rate. , The effect of less equipment and facilities and abundant sources

Inactive Publication Date: 2015-11-25
JIANGSU UNIV
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Problems solved by technology

[0005] Longan (Longan) is a tropical fruit belonging to Sapindaceae. It is native to South Asia and has been introduced to other regions with warm climates. At present, research on longan at home and abroad is mainly focused on food and medicinal aspects, while research on longan The research and utilization of longan shells are less, and a large number of discarded longan shells are not used rationally every year. The main components of lon

Method used

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  • Methylene blue dye adsorbent and preparation and application method thereof
  • Methylene blue dye adsorbent and preparation and application method thereof
  • Methylene blue dye adsorbent and preparation and application method thereof

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Experimental program
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Embodiment 1-6

[0035] Taking the quality of the longan shell adsorbent prepared by adding the above method as a single variable, investigate the influence of the adsorbent quality on the adsorption effect, the concrete experimental steps are as follows: at room temperature, add 0.05g adsorbent to 50ml, the methylene blue solution of 150mg / L, Magnetically stirred for 12 hours, centrifuged, and measured the concentration of methylene blue solution after adsorption by visible spectrophotometry; then, change the quality of the added adsorbent by 0.1g, 0.15g, 0.2g, 0.25g, 0.3g, and repeat the above experimental operation; The experimental data are shown in Table 1, and the influence of the quality of the adsorbent on the adsorption of methylene blue solution by longan shells is shown in figure 1 .

[0036] by 1 figure 1 It can be seen that the quality of the adsorbent has the opposite effect on the adsorption capacity and dye removal rate. With the increase of the quality of the adsorbent, the ...

Embodiment 7-24

[0042] At different temperatures, taking the adsorption time as a single variable, the influence of the adsorption time on the adsorption effect at different temperatures was investigated. The specific experimental steps: first, at 20°C, add 0.1g of the above method to the 50ml, 150mg / L methylene blue solution to prepare The longan shell adsorbent was magnetically stirred for 5 minutes, centrifuged, and the concentration of methylene blue solution after adsorption was measured by visible spectrophotometry. Then, change the adsorption time to 10min, 30min, 60min, 120min, 180min, and repeat the above experimental operation.

[0043] Under the same conditions, the temperature of the above experiment was changed to 40°C and 60°C in turn, and another two groups of time factor experiments were carried out. The experimental data obtained are shown in Table 2. The influence of adsorption time on the adsorption of methylene blue solution at different temperatures is shown in image 3 ....

Embodiment 25-30

[0049] Taking the initial pH of the methylene blue solution as a single variable, investigate the influence of the initial pH of the solution on the adsorption effect, the specific steps of the experiment are as follows: adjust the pH of the solution with 0.1mol / L HCl or NaOH, adjust the initial pH of the methylene blue solution to 2.34, take 50ml, 150mg / L of methylene blue solution, add 0.1g longan shell adsorbent prepared by the above method, magnetically stir for 12h, centrifuge, use visible spectrophotometry to measure the concentration of methylene blue solution after adsorption; then, change the initial pH of methylene blue solution to 3.05, 3.51 , 4.31, 7.16, 10.34, repeat the above experimental operation; the experimental data obtained are shown in Table 3, and the effect of the initial pH of the solution on the adsorption of methylene blue solution on longan shells is shown in Figure 4 .

[0050] Depend on Figure 4 It can be seen that the initial pH of the solution...

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Abstract

The invention belongs to the technical field of dye adsorption, and especially relates to a longan shell dye adsorbent and a method for adsorbing methylene blue dye in water. A preparation method of the dye adsorbent is as below: first washing waste longan shell with tap water, washing with distilled water several times, removing impurities, separating by filtration and drying; and finally, conducting mechanical crushing and screening to obtain a sample of longan shell adsorbent used for adsorption of methylene blue. The present invention has the following advantages: the adsorbent use non-toxic and inexpensive materials with rich resources; the preparation of the adsorbent does not involve chemical modification, and is simple and feasible; the adsorption process has the characteristics of less equipment and facilities, simple steps, high adsorption rate and high adsorption efficiency; and the highest removal rate of methylene blue dye can reach 96.75%, and the maximum adsorption capacity can reach 136.44mg / g. Accordingly, the longan shell adsorbent is an economical environment-friendly efficient methylene blue adsorbent.

Description

technical field [0001] The invention belongs to the technical field of dye adsorption, in particular to a longan shell dye adsorbent and a method for adsorbing methylene blue dye in water. Background technique [0002] The rapid development of textile, papermaking, printing, medicine, cosmetics and other industries has promoted the large-scale use of dyes. According to incomplete statistics, there are as many as 100,000 dyes currently in use. However, about 10 to 15% of dyes are used in other industries. Released to the environment during preparation and use. These dyes are all organic substances, which hinder the light transmission of the water body after entering the water body, slow down the photosynthesis and growth of aquatic plants, reduce the dissolution of gas in the water, and destroy the aquatic ecosystem; at the same time, the dyes are bright in color and dissolve into water, soil, atmosphere or life In the environment, it causes sensory pollution to people. In a...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/38
Inventor 朱琳王亚任启赟沈湘黔
Owner JIANGSU UNIV
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