Method for preparation of biological adsorbent with canna edulis ker slags

The technology of a biological adsorbent and canna is applied in the field of preparation of biological adsorbents, which can solve the problems of restricting popularization and application, and achieve the effects of large adsorption capacity, simple preparation process and low price.

Inactive Publication Date: 2011-10-19
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the first time, we reported the adsorption of methylene blue by directly using plantain taro residue, but the maximum adsorption capacity of unmodified plantain taro residue to methylene blue can only reach 185mg / g, which limits the popularization and application in industrial water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Wash the plantain and taro dregs, filter, and dry at 85°C. Grind the dried plantain taro residue with a pulverizer, pass through a 20-mesh sieve, and set aside;

[0026] (2) Add 10g of plantain taro residue powder into 50ml of 1M phosphoric acid solution, mix and soak at a mass ratio of 1:3, soak for 5h at 30°C; filter, and wash with water until neutral. Dry at 105°C, crush and pass through a 200-mesh sieve to obtain the biosorbent of the present invention.

[0027] (3) The adsorption amount of the adsorbent to methylene blue is 325 mg / g, the adsorption amount to hexavalent chromium ion is 175 mg / g, the adsorption amount to nickel ion is 68 mg / g, and the adsorption amount to copper ion is 52 mg / g , the adsorption capacity of lead ions is 125mg / g.

Embodiment 2

[0029] (1) Wash the plantain and taro dregs, filter, and dry at 90°C. Grind the dried plantain taro residue with a pulverizer, pass through a 20-mesh sieve, and set aside;

[0030] (2) Add 10g of plantain taro residue powder into 50ml of citric acid solution with a concentration of 2M, mix and soak at a mass ratio of 1:15, and soak for 7h at 50°C; filter and wash with water until neutral. Dry at 105°C, crush and pass through a 200-mesh sieve to obtain the biosorbent of the present invention.

[0031] (3) The adsorption amount of the adsorbent to methylene blue is 385 mg / g, the adsorption amount to hexavalent chromium ion is 245 mg / g, the adsorption amount to nickel ion is 78 mg / g, and the adsorption amount to copper ion is 55 mg / g , the adsorption capacity of lead ions is 135mg / g.

Embodiment 3

[0033] (1) Wash the plantain and taro dregs, filter, and dry at 85°C. Grind the dried plantain taro residue with a pulverizer, pass through a 20-mesh sieve, and set aside;

[0034] (2) Add 10g of plantain taro residue powder into 50ml of 0.05M nitric acid solution, mix and soak in a mass ratio of 1:5, soak for 7h at 60°C; filter, and wash with water until neutral. Dry at 105°C, crush and pass through a 200-mesh sieve to obtain the biosorbent of the present invention.

[0035] (3) The adsorption amount of the adsorbent to methylene blue is 216 mg / g, the adsorption amount to hexavalent chromium ion is 115 mg / g, the adsorption amount to nickel ion is 58 mg / g, and the adsorption amount to copper ion is 50 mg / g , the adsorption capacity of lead ions is 87mg / g.

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Abstract

The invention relates to a method for preparation of a biological adsorbent with canna edulis ker slags, comprising the steps of: washing and air-drying or drying the canna edulis ker slags from which canna edulis ker starch is extracted, pulverizing the slags, and sieving the pulverized powder through a 20-mesh sieve; modifying the canna edulis ker slag powder in an acid solution at a concentration of 0.02-2M, with the powder and the acid in a mass ratio of 1:2-20 and a soaking time of 1-8 hours; washing the powder into neutrality and drying at a temperature of 30-120 DEG C, pulverizing the dried canna edulis ker slag powder and sieving it through a 200-mesh sieve, thus obtaining the product of biological adsorbent. The adsorption capacity of the biological adsorbent of canna edulis ker slags to basic dyes can reach 120-385mg / g, and the adsorption capacity to metal ions reaches 50-248mg / g. The preparation method of the invention is characterized by easily available raw material, simple, economical and environmentally friendly preparation process, as well as capability to make waste profitable. And the adsorbent prepared by the method can purify water resources, thus realizing the sustainable development of ecological resources.

Description

technical field [0001] The invention belongs to the field of biosorbents, and in particular relates to a preparation method of a biosorbent using plantain and taro dregs as raw materials. The biosorbent can be applied to the removal of metal ion wastewater and dye wastewater. Background technique [0002] In recent years, with the development of the national economy and people's increasing attention to environmental protection issues, more and more attention has been paid to the advanced treatment of metal ions and dyes in electroplating wastewater, printing and dyeing wastewater, and tannery wastewater. Commonly used chemical methods, ion exchange methods, microbial methods and other treatment methods have better results when dealing with high-concentration metal ion solutions and high-concentration dye wastewater, but there are technical problems in the advanced treatment of low-concentration metal ions and printing and dyeing wastewater. complex and costly issues. The n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 卢玉栋吴宗华游瑞云叶琳林筱璇
Owner FUJIAN NORMAL UNIV
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