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Resin base adsorbent with high selectivity to heavy metal and preparing process thereof

A high-selectivity, adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem of no specific report on the adsorption performance of heavy metal ions, difficult industrial adsorption applications, poor water purification capacity, etc. problem, to achieve the effect of good mechanical strength, improved adsorption selectivity, and increased adsorption capacity

Active Publication Date: 2007-03-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(The preparation of crystallinezirconium phosphate and some observation on its ion exchange behaviors, Inorg.Nucl.Chem.1964, 26:117-129), but its adsorption performance on heavy metal ions has not been specifically reported
At the same time, since zirconium phosphate generally exists in extremely fine particles (about 0.2-20 microns), it is difficult to directly realize industrial adsorption applications due to the huge pressure drop during application.
Due to the poor selectivity of conventional cation exchange resins to heavy metals, when other conventional cations such as Na in water or industrial wastewater + , Mg 2+ 、K + , Ca 2+ When the concentration is high, the actual purification ability of water body is poor, and the application cost is high
There is no relevant literature report on the selective adsorption of zirconium phosphate to heavy metals and its immobilization on the resin surface

Method used

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Examples

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Effect test

Embodiment 1

[0027] A resin-based adsorbent with a polystyrene skeleton and a surface-linked sulfonic acid group and a preparation method thereof. In a 200ml beaker, add 40g ZrOCl 2 ·8H 2 O, 8ml of concentrated hydrochloric acid, add water to fully dissolve and set the volume to 50ml, the concentration of zirconium oxychloride in this solution is about 2.5mol / l, hydrochloric acid 2mol / l. Slowly add 30g of macroporous cation exchange resin (D-001) into this beaker, so that the solution completely immerses the resin. Put the resin and solution solid-liquid mixed system in an oven to dry, so that the zirconium salt can completely enter the resin pores, control the temperature at 40°C, and dry for 12 hours. Put the dried resin in a 500ml round bottom flask, slowly add 350ml 4mol / l phosphoric acid solution, and keep stirring, the stirring time is controlled for 24h. After the reaction, use 1mol / l NH 4 NO 3 solution to wash away excess phosphoric acid, and then repeatedly rinse with a large...

Embodiment 2

[0029] A resin-based adsorbent with a polystyrene skeleton and a surface-bonded carboxylic acid group and a preparation method thereof. In a 200ml beaker, add 30g ZrOCl 2 ·8H 2 0, 4ml of concentrated hydrochloric acid, add water to fully dissolve and settle to 50ml, the concentration of zirconium oxychloride in this solution is about 2mol / l, hydrochloric acid 1mol / l. Slowly add 30 g of macroporous acrylic acid type ion exchange resin (D-113) into this beaker, so that the solution completely immerses the resin. Put the resin and solution solid-liquid mixed system in an oven to dry, so that the zirconium salt can completely enter the resin pores, control the temperature at 40°C, and dry for 12 hours. Put the dried resin in a 500ml round bottom flask, slowly add 350ml, 4mol / l phosphoric acid solution, and keep stirring, the stirring time is controlled for 24h, after the reaction, use 0.5mol / l NH 4 NO 3 solution to wash away excess phosphoric acid, and then repeatedly rinse wi...

Embodiment 3

[0031] A resin-based adsorbent with a polystyrene skeleton and a surface-linked phenolic hydroxyl group and a preparation method thereof. First, bond the phenolic hydroxyl group on the surface of the resin skeleton: import 15ml of nitrobenzene into a beaker with 30g of chloromethylated polystyrene spheres (referred to as chlorine spheres) and soak for 24 hours, then add 2g of anhydrous aluminum chloride as a catalyst, And gradually add 30g of phenol, raise the temperature to 330K within 1 hour under the protection of nitrogen, continue the reaction for 6 hours, and extract the obtained resin with ethanol to obtain a polystyrene skeleton with phenolic hydroxyl groups on the surface. In a 200ml beaker, add 50g ZrOCl 2 ·8H 2 O, 8ml of concentrated hydrochloric acid, add water to fully dissolve and set the volume to 50ml, the concentration of zirconium oxychloride in this solution is about 3mol / l, hydrochloric acid 2mol / l. Slowly add 30 g of the above-mentioned synthesized resin...

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PUM

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Abstract

The present invention discloses a resin base adsorbing agent with high selectivity for heavy metal and its preparation method, belonging to the field of macroporous resin. The main structure composition of this adsorbing agent includes: (1), basic skeleton, it is a macroporous polystyrene skeleton; (2), functional group bond-linked on the skeleton is acid group or low-polar group; and (3), effective component of functional material fixedly-loaded on the inner surface of skeleton is Zr(HPO4)2. Said invention also provides its preparation method and concrete steps.

Description

1. Technical field [0001] The invention relates to a resin-based adsorbent with a macroporous polystyrene resin as a matrix and a preparation method thereof, more specifically a resin-based adsorbent for highly selective removal of heavy metals such as lead, zinc, and cadmium from water bodies and its preparation method. 2. Background technology [0002] Regarding the preparation of zirconium phosphate and its ion exchange properties for alkali metals or alkaline earth metals, Abraham Clearfield et al. have conducted systematic research abroad. (The preparation of crystallinezirconium phosphate and some observation on its ion exchange behaviors, Inorg.Nucl.Chem.1964, 26:117-129), but its adsorption performance on heavy metal ions has not been specifically reported. At the same time, since zirconium phosphate generally exists in extremely fine particles (about 0.2 to 20 microns), it is difficult to directly realize industrial adsorption applications due to the huge pressure ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 潘丙才张庆瑞潘丙军杜伟张炜铭张庆建许正文郑凯张全兴
Owner NANJING UNIV
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