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Modified pomelo peel metal absorbent and preparation method thereof

The technology of an adsorbent and pomelo peel is applied to an adsorbent for adsorbing low-concentration heavy metal ions in wastewater and its preparation, and the field of metal adsorbent and its preparation can solve the problem that the adsorption capacity of heavy metal ions is not very strong.

Inactive Publication Date: 2010-08-25
JINHUA VOCATIONAL TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unmodified pomelo peel is directly used as a heavy metal adsorbent, and there are still some pectin and cellulose with high crystallinity, and the adsorption capacity for heavy metal ions is not very strong.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: collect fresh pomelo peel, peel off the outer skin, leave the white inner skin, chop it into small particles with a diameter of 1.0 cm, put it into 10% NaOH solution and soak it at room temperature for 2 hours, pull out the squeezed solution, and rinse with water Wash until pH2+ In the solution, put 1g of adsorbent, the adsorption rate is 98.7%; when the pH is 8, in 100mL, 100μg / mL of Cr 6+ In the solution, put 1g of adsorbent, the adsorption rate is 97.8%; when the pH is 7, in 100mL, 100μg / mL of Pb 2+ In the solution, 1 g of adsorbent was added, and the adsorption rate was 94.9%.

Embodiment 2

[0009] Embodiment 2: collect fresh pomelo peel, peel off the outer skin, leave the white inner skin, chop it into small particles with a diameter of 3.0 cm, throw it in 5% NaOH solution and boil it for 1 hour, remove and squeeze the solution, and wash it with clear water Wash until pH2+ In the solution, put 1g of adsorbent, the adsorption rate is 94.3%; when the pH is 8, in 100mL, 100μg / mL of Cr 6+ In the solution, put 1g of adsorbent, the adsorption rate is 96.7%; when the pH is 7, in 100mL, 100μg / mL of Pb 2+ In the solution, 1 g of adsorbent was added, and the adsorption rate was 97.8%.

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PUM

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Abstract

The invention relates to a modified pomelo peel metal absorbent and a preparation method thereof. The preparation method comprises the following steps of: collecting the fresh pomelo peel, peeling the outer skin to leave the white inner skin, cutting the while inner skin into small pieces, soaking the small pieces in alkali liquor, washing the small pieces by water, adjusting the pH value to be 6 to 8, taking out and drying the small pieces, and finally, crushing the small pieces to obtain the modified pomelo peel absorbent. Before use, the modified pomelo peel absorbent is soaked for 0.5 to 1 hour in hot water of 80 DEG C and filled in an absorbing column. The absorbent can absorb many kinds of low-concentration heavy metal ions at room temperature and in the pH value range of 5 to 9.

Description

technical field [0001] The invention relates to a metal adsorbent and a preparation method thereof, belonging to the field of biological adsorbents, in particular to an adsorbent for adsorbing low-concentration heavy metal ions in waste water prepared by modifying pomelo peel and its preparation method. Background technique [0002] The harm of heavy metal pollution in environmental water is a very serious problem. Traditional treatment methods for heavy metal pollution in water bodies include chemical precipitation, electrolysis, ion exchange, membrane treatment, and mixed treatment. However, these methods have defects such as complex process, cumbersome operation, high operating cost, and secondary pollution when dealing with low-concentration (less than 100mg / L) heavy metal wastewater. Due to the advantages of abundant raw material sources, low price, simple equipment, easy operation, and no secondary pollution, biosorption technology has become one of the options for t...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 肖珊美林鸿刁银军卢政明罗小会
Owner JINHUA VOCATIONAL TECH COLLEGE