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Fibrillar heavy metal ion adsorbent as well as preparation method and application thereof

A technology of heavy metal ions and adsorbents, which is applied in the preparation of spinning solutions, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of limited application due to mechanical characteristics, achieve good biocompatibility, low cost, and good development prospects Effect

Inactive Publication Date: 2013-04-03
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a problem that has to be paid attention to is that the granular morphology and unbearable mechanical characteristics of hydroxyapatite limit its application in actual wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Disperse 0.66 g of hydroxyapatite and 50 g of water under the action of a probe-type ultrasonic disperser for 3 minutes, so that the two are evenly mixed. Then, under the condition of 60°C in the above steps, add 1.545 grams of sodium alginate, and stir it magnetically to prepare a high-viscosity, uniformly mixed sodium alginate / hydroxyapatite mixed spinning solution. The first coagulation bath is a solute mass The fraction is 5% calcium chloride aqueous solution, the temperature of the first coagulation bath is 30°C, the draft ratio of the spinning head is 1:1, the second coagulation bath is soaked in pure aqueous solution for 12 hours, washed with water for 5 minutes, and dried naturally. The strength value measured by the strength tester is 1.97CN / dtex, and the cadmium ion adsorption amount reaches 253.95mg / g through the atomic spectrophotometer.

example 2

[0022] Disperse 0.66 g of hydroxyapatite and 50 g of water under the action of a probe-type ultrasonic disperser for 3 minutes, so that the two are evenly mixed. Then, under the condition of 60°C in the above steps, sodium alginate is added, and stirred by magnetic force to prepare a high-viscosity, uniformly mixed sodium alginate / hydroxyapatite mixed spinning solution. The quality of sodium alginate is the solvent 3.09% of the water quality, the first coagulation bath is that the solute mass fraction is 10% calcium chloride aqueous solution, the first coagulation bath temperature is 45 ℃, and the spinning head draft ratio is 1: 1.5, and the second coagulation bath is that the mass fraction is Soak in 5% calcium chloride aqueous solution for 12 hours, wash with water for 5 minutes, and dry naturally. The strength value measured by the single fiber strength meter is 1.20CN / dtex, and the cadmium ion adsorption amount reaches 242.62mg / g through the atomic spectrophotometer.

example 3

[0024] Disperse 0.66 g of hydroxyapatite and 50 g of water under the action of a probe-type ultrasonic disperser for 3 minutes, so that the two are evenly mixed. Then, at 60°C in the above steps, add 1.545 grams of sodium alginate and stir it magnetically to prepare a high-viscosity, well-mixed sodium alginate / hydroxyapatite mixed spinning solution. The first coagulation bath is a solute mass Fraction is 15% calcium chloride aqueous solution, the first coagulation bath temperature is 60 ℃, and the drawing ratio of spinning head is 1: 2, and the second coagulation bath is that the mass fraction is 5% calcium chloride aqueous solution soaking 12h, washing 12h, After drying naturally, the strength value measured by the single fiber strength meter is 1.04CN / dtex, and the cadmium ion adsorption amount reaches 236.44mg / g through the atomic spectrophotometer.

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Abstract

The invention discloses a fibrillar metal ion adsorbent as well as a preparation method and application thereof. The fibrillar metal ion adsorbent is prepared by taking hydroxylapatite and sodium alginate as raw materials and adopting a wet spinning method and different spinning processes. The fibrillar metal ion adsorbent has higher absorption capacity reaching 258.62 mg / g at most on cadmium ions, and the sodium alginate has nontoxicity, degradability and good biocompatibility, and therefore the problem of difficulty in processing of adsorbing materials absorbing heavy metal ions can be solved. The fibrillar metal ion adsorbent disclosed by the invention has the advantages of solvent spinning capability, low cost, simplicity, feasibility, easiness for preparation in practical application, and energy-saving and emission-reduction performances, thereby having a better development prospect in the field of water purification.

Description

technical field [0001] The invention relates to a metal ion adsorbent, in particular to a fibrous metal ion adsorbent and a preparation method and application thereof. Background technique [0002] With the improvement of people's living standards, people's awareness of environmental protection is increasing. As we all know, global environmental pollution is increasingly destroying the ecological balance formed by the earth's biosphere for hundreds of millions of years, and posing a threat to the living environment of human beings. The problem of wastewater treatment has become the top priority of today's scientific research. Wastewater contains various pollutants such as heavy metals, dyes, and organic matter. Among them, heavy metal ions, as the main source of harm to human health, animal and plant growth, and water sources and soils, have received more urgent attention, such as the world’s major pollution incident that caused a sensation” Minamata disease and bone pain d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62D01D1/02D01D5/06C02F101/22
Inventor 王晓宋志云杨子泽徐明媚王娜
Owner DALIAN POLYTECHNIC UNIVERSITY