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Preparing method for NaOH solution modified leersia hexandra heavy metal adsorbing material

A technology for adsorbing materials and heavy metals, which is applied in the field of preparation of NaOH solution-modified Li Shihe heavy metal adsorption materials, can solve the problem of lack of systematicness, incomplete research on biological adsorption mechanism, and obstacles to the development and utilization of high-performance and high-selectivity adsorbents, etc. question

Inactive Publication Date: 2015-11-18
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The research on the mechanism of biosorption is still incomplete and lacks systematicness, which hinders the development and utilization of high-performance and high-selectivity adsorbents.

Method used

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  • Preparing method for NaOH solution modified leersia hexandra heavy metal adsorbing material
  • Preparing method for NaOH solution modified leersia hexandra heavy metal adsorbing material
  • Preparing method for NaOH solution modified leersia hexandra heavy metal adsorbing material

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Embodiment

[0018] 1. The specific steps of the preparation method of Lishihe heavy metal adsorption material modified by NaOH solution are as follows:

[0019] (1) Lishihe was collected, washed 3 times with tap water, and then washed 3 times with ultrapure water.

[0020] (2) Put Lishihe obtained in step (1) into a kraft file bag, dry in an air-blast drying oven at 80°C for 24 hours, then pulverize with a high-speed pulverizer, and pass through a 50-mesh sieve after pulverization.

[0021] (3) Mix 50 mL of absolute ethanol, 25 mL of 0.25 mol / L NaOH solution and 25 mL of deionized water to prepare a modification solution.

[0022] (4) Add 1 g of Lishihe sieved in step (2) to the modified solution obtained in step (3), adjust the constant temperature of the shaker at 25°C and rotate at 125r / min, react for 12 hours, and wash with deionized water Until the pH is neutral, the target product obtained by filtration is dried in a drying oven at 60° C. for 24 hours, and the NaOH solution obtaine...

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Abstract

The invention discloses a preparing method for a NaOH solution modified leersia hexandra heavy metal adsorbing material. The preparing method comprises the steps that 1, leersia hexandra is collected, then flushed three times with tap water and flushed three times with ultra-pure water; 2, the obtained leersia hexandra is placed into a kraft archival bag, then placed into a blast drying box at the temperature of 80 DEG C to be dried for 24 hours, then smashed through a high-speed pulverizer, and screened in a 50-mesh mode after being smashed; 3, 50mL of absolute ethyl alcohol, 25mL of a NaOH solution with concentration of 0.1-0.5 mol / L and 25mL of deionized water are mixed to prepare a modified solution; 4, 1g of the screened leersia hexandra is added into the modified solution, a shaking table is adjusted with the constant temperature of 25 DEG C and the rotating speed of 125 r / min, after the reaction is carried out for 12 hours, the deionized water is used for washing until a pH value is neutral, the product is dried in the drying box at the temperature of 60 DEG C for 24 hours after being filtered, and then the NaOH solution modified leersia hexandra heavy metal adsorbing material is obtained. The raw material source is wide, cost is low, the effect is remarkable, the operation process is simple, secondary pollution is avoided in the adsorption process, adsorbed Cu2+ is easy to desorb, and resources can be gathered and recovered further.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a preparation method of Lishihe heavy metal adsorption material modified by NaOH solution. Background technique [0002] With the improvement of human science level, the treatment technology of heavy metal polluted wastewater has been continuously developed. Although there are many treatment methods for heavy metal wastewater, they can be roughly divided into three types according to the principle of treatment methods: chemical method, physical chemical method and biological method. Chemical method is to remove heavy metal ions in water through chemical reaction, including chemical precipitation method, redox method and electrolysis method; physical and chemical method is to make heavy metal ions in water adsorb without changing their chemical form. , concentration, and separation methods, including ion exchange, adsorption, reverse osmosis, electrodialysis, and ev...

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62C02F1/64
Inventor 林华梁亮张学洪刘立恒游少鸿
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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