Nano alkali lignin as well as preparation method thereof and application thereof as heavy metal ion catcher

An alkali lignin and nanotechnology, which is applied in the directions of alkali metal compounds, alkali metal oxides/hydroxides, chemical instruments and methods, etc. The effect of high efficiency and improved removal efficiency

Active Publication Date: 2019-02-12
江苏纯一新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a nano-alkali lignin and its preparation method and its application as a heavy metal ion scavenger. After the method is modified, it can overcome the problem of low ability of traditional alkali lignin to capture heavy metal ions.

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  • Nano alkali lignin as well as preparation method thereof and application thereof as heavy metal ion catcher
  • Nano alkali lignin as well as preparation method thereof and application thereof as heavy metal ion catcher

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preparation example Construction

[0028] A preparation method of nano-alkali lignin for purifying heavy metal ions, under the condition of normal temperature and pressure, under the condition of having a freezing device and a magnetic stirrer, comprising the following steps:

[0029] (1) At room temperature, dissolve 3g of alkali lignin solid in 50ml of water to prepare an aqueous solution, add 15mL of trisodium thiocyanate trisodium salt dropwise to the aqueous solution, and stir the mixed solution with a magnetic stirrer after the addition 1h.

[0030] (2) Use refrigeration equipment to cool down the mixed solution. Below 0°C, add 4g of iodine element and 20g of potassium iodide, control the temperature of the mixed solution at 0°C, and react with magnetic stirring for 2h.

[0031] (3) After the reaction, the solution was suction filtered, washed several times with deionized water, 50 mL of hydrochloric acid solution was added, and the mixed solution was stirred at room temperature for 3 h.

[0032] (4) Suc...

Embodiment 2

[0037] A preparation method for purifying the nano-alkali lignin of heavy metal ions, comprising the following steps:

[0038] (1) At room temperature, 5 g of solid alkali lignin was dissolved in 45 ml of water to prepare an aqueous solution, 10 mL of trisodium thiocyanate solution was added dropwise to the aqueous solution, and the mixed solution was magnetically stirred for 2 hours.

[0039] (2) Use refrigeration equipment to cool down the mixed solution. Below 0°C, add 3g of iodine element and 15g of potassium iodide, control the temperature of the mixed solution at 0°C, and stir magnetically for 2h.

[0040] (3) After the reaction, the solution was suction filtered, washed several times with deionized water, 60 mL of sulfuric acid solution was added, and the mixed solution was stirred at room temperature for 3 h.

[0041] (4) Filtrate again, wash repeatedly with deionized water, use vacuum freeze-drying to obtain gray solid powder, the structural characteristics and functi...

Embodiment 3

[0045] A preparation method of nano-alkali lignin for purifying heavy metal ions, characterized in that it comprises the following steps:

[0046] (1) At room temperature, dissolve 6g of alkali lignin solids in 60ml of water to prepare an aqueous solution, add 15mL of trisodium thiocyanate trisodium salt dropwise to the water solution, and mix the solution with a magnetic stirrer after the addition. Stir for 1h.

[0047] (2) Use refrigeration equipment to cool down the mixed solution. Below 0° C., add 5 g of iodine element and 10 g of potassium iodide, control the temperature of the mixed solution at 0° C., and react with magnetic stirring for 2 hours.

[0048] (3) After the reaction, the solution was suction filtered, washed several times with deionized water, 70 mL of hydrochloric acid solution was added, and the mixed solution was stirred at room temperature for 3 h.

[0049] (4) Suction filtration again, repeated washing with deionized water several times, and vacuum free...

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Abstract

The invention belongs to the field of heavy metal ion catchers and specifically relates to nano alkali lignin as well as a preparation method thereof and application thereof as a heavy metal ion catcher. According to the nano alkali lignin disclosed by the invention, alkali lignin is utilized as a base raw material; matters such as trisodium thiocyanate and the like are added to modify the alkalilignin, and the nano heavy metal ion catcher with a larger specific surface area and more surface functional groups than original alkali lignin can be obtained; thus, an ideal effect of removing heavymetal ions can be achieved. According to the nano alkali lignin disclosed by the invention, an environment-friendly and clean heavy metal chelating agent is utilized to prepare the nano heavy metal ion catcher, so that the removal efficiency of heavy metal ions in water is improved; furthermore, the nano alkali lignin can be recycled.

Description

technical field [0001] The invention belongs to the field of heavy metal ion scavenger, and relates to a nano alkali lignin and its preparation method and application, in particular to a preparation method and its Application in heavy metal ion wastewater treatment. Background technique [0002] Heavy metal ions mainly include copper, lead, chromium, cadmium, mercury, etc., which mainly enter water bodies, soil, and groundwater through man-made industrial sources, accumulate and enrich in organisms, and further amplify through the food chain and be absorbed by the human body, thereby endangering human beings of good health. Among them, most heavy metals have carcinogenic effects, such as heavy metal cadmium can cause "itai disease", heavy metal mercury can cause "minamata disease", heavy metal lead can cause excessive human blood lead, causing moderate or severe poisoning symptoms, heavy metal chromium ions It can cause damage to the structure and function of normal cells....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/24B01J20/28004C02F1/286C02F2101/20
Inventor 郑春莉王巧蕊沈振兴程星星范宇睿章剑羽
Owner 江苏纯一新材料有限公司
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