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Method for preparing modified plant fibrous sale price biological adsorption agent

A biosorbent, plant fiber technology, applied in chemical instruments and methods, other chemical processes and other directions, can solve the problems of complex technical process and high raw material cost, and achieve the effect of simple process, low cost and good adsorption effect

Inactive Publication Date: 2008-08-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of raw materials used in this technology is relatively high, and the technical process is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Soybean stalks are used as raw materials, cleaned, dried and pulverized, and screened to obtain 40-100 mesh soybean stalk powder. Then mix and stir for 60 minutes at a ratio of 1g to 20ml 0.1M NaOH, then filter through a 100-mesh sieve and wash the alkali-washed straw powder with water. The cleaning process is repeated several times until the cleaning solution is clear, and then dried at 100°C. Next, mix the soybean stalk powder obtained above at a ratio of 1g corresponding to 9ml 0.6M citric acid solution, stir at a speed of 1000r / min for one hour, place the obtained solid-liquid mixed phase in a stainless steel square pan, and dry it with air at 50°C After 24 hours, the temperature was raised to 120°C, kept for 90 minutes, and then cooled to room temperature. The obtained reactants are washed again until the cleaning solution is clear and neutral, the obtained wet modified soybean stalk powder is dried at 100° C., and the citric acid modified soybean stalk adsorbent i...

Embodiment 2

[0023] Mung bean shells are used as raw materials, cleaned, dried and crushed to obtain 10-40 mesh mung bean shell powder. Then mix and stir for 30 minutes at a ratio of 1g to 30ml 0.05M NaOH, then filter through a 40-mesh sieve and wash the mung bean shell powder after alkali washing with water. The cleaning process is repeated several times until the cleaning solution is clear, and then dried at 60°C. Next, mix the mung bean shell powder obtained above at a ratio of 1g corresponding to 10ml 0.5M lactobionic acid solution, stir at a speed of 500r / min for one hour, place the obtained solid-liquid mixed phase in a stainless steel square pan, and dry it with air at 50°C After 24 hours, the temperature was raised to 100° C., kept for 60 minutes, and then cooled to room temperature. The obtained reactants are washed again until the cleaning solution is clear and neutral, the obtained wet modified mung bean shell powder is dried at 60° C., and after cooling, the lactobionic acid mo...

Embodiment 3

[0025] Using corncobs as raw materials, cleaning them, drying them and pulverizing them, and screening them to obtain 40-60 mesh corncob powders. Then mix and stir at a ratio of 1 g to 25 ml deionized water for 15 minutes, and then filter through a 60-mesh sieve to obtain washed corncob powder. This washing process is repeated several times until the cleaning solution is clear, and dried at 80 ° C. Next, mix the corn cob powder obtained above at a ratio of 1 g corresponding to 8 ml of 1M malic acid solution, stir at a speed of 800 r / min for one hour, place the obtained solid-liquid mixed phase in a stainless steel square pan, and dry it with air at 50 ° C. After 24 hours, the temperature was raised to 80° C., kept for 120 minutes, and then cooled to room temperature. The obtained reactants were washed again until the cleaning solution was clear and neutral, and the obtained wet modified corncob powder was dried at 80° C., and after cooling, the malic acid modified corncob adso...

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Abstract

The present invention provides a method for heavy metal adsorbentusing vegetable fibre waste, including following steps : weighing fibre waste raw material, washing, drying to constant weight; crashing material, screening raw material powder; raw material after being screening mixing with the de-ionized water or aqueous slkali, plant after water washing or caustic washing by using drying net filtering mixer, and adequately cleaning several times by water, till clarification of the cleaning liquid, plant powder after being cleaning dried to constant weight; mixing the material after being water washing or caustic washing and the carboxylic acid solvent, forced air drying mixed solid-liquid mixer after being mixed, generating heat chemical reaction by improving temperature, cooling to door temperature after being heat preservation; cleaning heat reacted plant powder, dying the moisture powder to constant weight, obtaining biological adsorbent corresponding to carboxylic acid modification plant fibre after being cooled. The invention has a lower cost, wide sources and simple process.

Description

technical field [0001] The invention relates to a preparation method in the technical field of wastewater treatment, in particular to a preparation method of a modified plant fibrous cheap biosorbent. Background technique [0002] In recent years, adsorption has become a promising method for heavy metal wastewater treatment. Activated carbon is an excellent adsorption material. But due to the high cost of activated carbons, there has been increasing focus on finding inexpensive adsorbents. These cheap adsorbents include natural substances such as zeolite and clay, industrial waste such as fly ash and slag, and agricultural and forestry waste such as straw and fruit peel. These wastes are low in cost, and their improper disposal can also cause environmental pollution. The preparation of cheap adsorbents through physical treatment and chemical modification not only has great economic benefits, but also has great social benefits. [0003] Through literature search to prior ...

Claims

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Application Information

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IPC IPC(8): B01J20/30
Inventor 朱波范同祥张荻
Owner SHANGHAI JIAO TONG UNIV
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