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Compound biosorbent capable of greatly improving capability of adsorbing heavy metal by waste biomasses and preparation method thereof

A biological adsorbent, a technology for adsorbing heavy metals, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as the difficulty of direct application of granular hydrated iron oxide, and achieve resource utilization and waste treatment Effect

Inactive Publication Date: 2014-11-12
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite biosorbent that greatly improves the adsorption of heavy metals by waste biomass and its preparation method. -COOH, -NH 2 The Donnan membrane benefit triggered by such active groups has greatly improved the adsorption capacity, adsorption speed and adsorption selectivity of agricultural waste to heavy metal ions, so as to realize the popularization and application of agricultural waste to purify heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A. 270g FeCl 3 ·6H 2 O is dissolved in 1L water to obtain Fe(III) solution, wherein the concentration of Fe(III) is 1mol / L;

[0025] B. Place 50g of corn cob particles in the adsorption column, and slowly pass the Fe(III) solution through the adsorption column at a speed of 1BV / h at 25 degrees Celsius until the Fe(III) solution passes through completely, and the Fe(III) will be fully absorbed Exchange to the surface of corn cob pellets;

[0026] C. Pour out the loaded Fe(III) corn cob particles obtained in step B and bake at 50 degrees Celsius for 2h, then add it to a mixed solution containing 4% NaOH and 3% NaCl in mass concentration, and dry it at 30 degrees Celsius Shock 15h;

[0027] D. filter out the corn cob particles obtained in step C, first rinse with 0.001M HCl to pH 4-5, then rinse with distilled water to pH 6-8;

[0028] E. Dry the corn cob particles obtained in step D at 50 degrees Celsius for 12 hours to obtain the composite adsorbent loaded with nanom...

Embodiment 2

[0031] A. Add 600g Fe 2 (SO 4 ) 3 Dissolve in 1L of water to obtain Fe(III) solution, wherein the concentration of Fe(III) is 1.5mol / L;

[0032] B. Place 60g of corn cob particles in the adsorption column, and slowly pass the Fe(III) solution through the adsorption column at a speed of 1BV / h at 35 degrees Celsius until the Fe(III) solution passes through completely, and the Fe(III) will be fully absorbed Exchange to the surface of corn cob pellets;

[0033] C. Pour out the Fe(III) corncob particles obtained in step B and dry at 45 degrees Celsius for 2 hours, then add to a mixed solution containing 4.5% NaOH and 3% NaCl, and shake at 35 degrees Celsius for 12 hours;

[0034]D. filter out the corn cob particles obtained in step C, first rinse with 0.001M HCl to pH 4-5, then rinse with distilled water until the pH value is 7.2;

[0035] E. Dry the corn cob particles obtained in step D at 55 degrees Celsius for 12 hours to obtain the composite adsorbent loaded with nanometer ...

Embodiment 3

[0038] A. 540g FeCl 3 ·6H 2 O was dissolved in 1L water to obtain Fe(III) solution, wherein the concentration of Fe(III) was 2.0mol / L;

[0039] B. Place 50g corn cob particles in the adsorption column, and slowly pass the Fe(III) solution through the adsorption column at a speed of 1.5BV / h at 45 degrees Celsius until the Fe(III) solution passes through completely, and Fe(III) will be absorbed Fully exchanged to the surface of corn cob particles;

[0040] C. Pour out the Fe(III) corncob particles obtained in step B and dry at 60 degrees Celsius for 2 hours, then add to a mixed solution containing 3.2% NaOH and 4% NaCl, and shake at 20 degrees Celsius for 15 hours;

[0041] D. filter out the corn cob particles obtained in step C, first rinse with 0.001M HCl to pH 4-5, then rinse with distilled water to pH 6.8;

[0042] E. Dry the corn cob particles obtained in step D for 12 hours at 45 degrees Celsius to obtain the composite adsorbent loaded with nanometer iron oxide.

[004...

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Abstract

The invention discloses a compound biosorbent capable of greatly improving the capability of adsorbing heavy metal by waste biomasses and a preparation method thereof. The biosorbent comprises following components: particles made of crops or wood wastes and nano ferric oxide hydrate which is loaded on the surfaces of the particles and is 10-100mg / g based on iron. The preparation method of the sorbent comprises the following preparation steps: enabling a Fe (III) solution with a certain mass concentration to slowly pass through an adsorption column filled with particle-form agricultural wastes and sufficiently contacting the Fe (III) solution with solid particles; then drying the solid particles at the temperature of 40-60 DEG C for 2 hours; adding the solid particles into a Na-NaCl mixed solution to be vibrated for 12-24 hours; filtering solid substances and repeatedly washing by using 0.001M HCl solution and distilled water until the pH value is 6-8; and finally, drying the treated agricultural waste particles at the temperature of 40-60 DEG C for 12-24 hours to obtain a needed material. According to the compound biosorbent, the adsorption capacity can be increased by 2-6 times, the adsorption speed can be increased by 2-5 times and the distribution coefficient of representation adsorption selectivity is increased by 10-50 times.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a composite biosorbent capable of greatly improving the heavy metal adsorption performance of crops or wood waste and a preparation method thereof. Background technique [0002] Biosorbents have been a research hotspot in the field of environmental governance in recent years. Natural resources or some by-products in industrial and agricultural production processes have been continuously applied to the governance of environmental pollution due to their advantages of low price, wide range of sources, and light secondary pollution. Agricultural waste is one of many biosorbents. Applying it to the purification of typical heavy metal ions in water can not only reduce pollutants, but also realize the resource utilization of agricultural waste. This point has a lot of literature reports at home and abroad (Adsorption of copper ions from water by modified agricultural by-products, Desali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 万顺利马钊钊薛瑶徐圣友钱丽萍马明海
Owner HUANGSHAN UNIV
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