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Method for preparing porous alginic acid noble metal adsorbent through template method

A technology of alginic acid and precious metals, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of inability to deal with mixed metal ion solutions, limit industrial application and promotion, etc., and achieve excellent selective adsorption effect , good practical application prospects, and the effect of improving the adsorption rate

Inactive Publication Date: 2019-03-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many current studies are done in a single metal solution, which cannot deal with the mixed metal ion solution in actual production; moreover, most of the adsorbents are in the form of powder and hydrogel, and their structural limitations restrict these biomass Industrial application and popularization of adsorbent

Method used

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  • Method for preparing porous alginic acid noble metal adsorbent through template method
  • Method for preparing porous alginic acid noble metal adsorbent through template method

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Experimental program
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Effect test

Embodiment 1

[0024] Add 10 mL of carbon disulfide into 250 mL of 14% sodium hydroxide solution, then add 5 g of sodium alginate powder, stir until completely dissolved, and keep at 20°C for 12 hours. Add 2.0g of alumina powder to the solution, stir it rapidly with a mechanical stirrer for 90s, and place the solution in an ultrasonic cleaner to remove air bubbles. The resulting solution was added dropwise through a syringe (20Gauge needle) into a calcium chloride solution with a mass concentration of 2% to solidify into a ball, left to stand for 12 hours, filtered out the prepared hydrogel, and transferred to a hydrochloric acid solution with pH=1 to remove Alumina formwork, rinsed repeatedly. Finally, the porous alginic acid noble metal adsorbent was obtained by drying at room temperature.

Embodiment 2

[0026] Add 10 mL of carbon disulfide to 250 mL of 14% sodium hydroxide solution, then add 8 g of sodium alginate powder, stir until completely dissolved, and keep at 30°C for 12 hours. Add 4.0g of alumina powder to the solution, stir rapidly with a mechanical stirrer for 120s, and place the solution in an ultrasonic cleaner to remove air bubbles. The resulting solution was added dropwise through a syringe (16Gauge needle) into a calcium chloride solution with a mass concentration of 1% to solidify into a ball, left to stand for 12 hours, filtered out the prepared hydrogel, and transferred to a hydrochloric acid solution of pH=1 to remove Alumina formwork, rinsed repeatedly. Finally, the porous alginic acid noble metal adsorbent was obtained by drying at room temperature.

Embodiment 3

[0028] Add 10 mL of carbon disulfide to 250 mL of 14% sodium hydroxide solution, then add 10 g of sodium alginate powder, stir until completely dissolved, and keep at 30°C for 12 hours. Add 4.0g of alumina powder to the solution, stir rapidly with a mechanical stirrer for 120s, and place the solution in an ultrasonic cleaner to remove air bubbles. The resulting solution was added dropwise through a syringe (16Gauge needle) into a calcium chloride solution with a mass concentration of 2% to solidify into a ball, left to stand for 12 hours, filtered out the prepared hydrogel, and transferred to a hydrochloric acid solution of pH=1 to remove Alumina formwork, rinsed repeatedly. Finally, the porous alginic acid noble metal adsorbent was obtained by drying at room temperature.

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Abstract

The invention discloses a method for preparing a porous alginic acid noble metal adsorbent through a template method and belongs to the technical field of adsorption and recovery of noble metals. Themethod is characterized by uniformly diffusing aluminum oxide powder in a chemically-modified sodium alginate solution, spheroidizing through a calcium chloride solution, removing an aluminum oxide template by using a dilute hydrochloric acid solution to prepare a porous spherical sodium alginate adsorbent. Compared with the conventional spherical noble metal adsorbent, the prepared adsorbent hashigh adsorption rate and high adsorption capacity, so that the defect that the conventional spherical adsorbent is difficult to fill in a dynamic adsorption column is overcome; a novel method is provided for industrial application of a biomass adsorbent; meanwhile, the prepared adsorbent has an extremely excellent effect on selectively adsorbing ions of noble metals such as gold, palladium and platinum in multiple metal mixing solutions, so that the adsorbent has broad application prospects in field of adsorption and recovery of the noble metals.

Description

technical field [0001] The invention belongs to the technical field of adsorption and recovery of precious metals, and in particular relates to a preparation method of a porous adsorbent using sodium alginate as a raw material. The adsorbent can selectively adsorb and separate noble metal ions in a mixed metal ion solution. Background technique [0002] The traditional methods for treating precious metal ions in water mainly include ion exchange method, reverse osmosis method, neutralization precipitation method, activated carbon adsorption and so on. These methods have certain application limitations, such as low processing efficiency, complicated operation, high operating cost, and difficulty in repeated use. Compared with these traditional noble metal ion treatment methods, the biomass adsorption method has the characteristics of low cost, high efficiency, and renewability, and has broad development space in the field of water treatment. The most common biomass in natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28C02F101/20
CPCB01J20/24B01J20/28019B01J20/28095C02F1/28C02F1/286C02F2101/20
Inventor 高翔鹏辛藜莉何晓春高志芳雷鹰李明阳
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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