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Titanium-zirconium adsorbent as well as preparation method and application thereof

An adsorbent, titanium-zirconium technology, applied in the field of new-type titanium-zirconium adsorbent and its preparation, can solve the problems of complex process and long reaction cycle of titanium-zirconium adsorbent, achieve the effect of reducing reaction time, simple process and increasing ethanol concentration

Active Publication Date: 2021-11-26
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems that the existing two-step method for preparing titanium-zirconium adsorbent has complicated process and long reaction period, the present invention provides a new preparation method of titanium-zirconium adsorbent with simple process. Titanium and zirconium are simultaneously loaded in the channel, which simplifies the preparation steps, shortens the reaction cycle, and improves the loading rate of titanium-zirconium bimetallic. The titanium-zirconium adsorbent can be applied to copper ions, pyrophosphate, coke in heavy metal wastewater or electroplating wastewater. The simultaneous removal of pollutants such as copper phosphate greatly improves the adsorption performance

Method used

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  • Titanium-zirconium adsorbent as well as preparation method and application thereof
  • Titanium-zirconium adsorbent as well as preparation method and application thereof
  • Titanium-zirconium adsorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A method for preparing a novel titanium-zirconium adsorbent with simple procedures. The titanium-zirconium adsorbent is synthesized by an integral continuous loading method, and the specific steps are:

[0053] S1 First prepare the zirconium-titanium ion solution: add 250ml ethanol and 15ml hydrochloric acid to a 500ml beaker, put the beaker in an ice water bath, add 20ml TiCl while stirring constantly 4 Solution, stir until no smoke is produced and the solution turns pale yellow, then stop;

[0054] S2 then added 60g ZrOCl 2 ·8H 2 O (the molar ratio of titanium to zirconium is 1:1), add 20mL of deionized water, and continue to stir until completely dissolved. At this time, the concentration of titanium ions in the solution was 9g / L, the concentration of zirconium ions was 17g / L, the concentration of hydrochloric acid was 4.9%, the concentration of ethanol was 82.0%, and the conductivity of the measured solution was 29mS / cm.

Embodiment 2

[0056] The steps of this comparative example are basically the same as those in Example 1, keeping the concentration of titanium ions in the solution at 9 g / L, the concentration of zirconium ions at 17 g / L, the concentration of hydrochloric acid at 4.9%, and the molar ratio of titanium to zirconium at 1:1. The difference is: in step S1, ethanol, hydrochloric acid, TiCl 4 The addition amount of solution is respectively: 250ml ethanol, 21ml hydrochloric acid, 27ml TiCl 4 Solution; ZrOCl in step S2 2 ·8H 2 The addition amount of O is 82.6g, and deionized water is 122ml.

[0057] The concentration of ethanol was 59.5%, and the measured conductivity of the solution was 51 mS / cm.

Embodiment 3

[0066] The present embodiment is the method for the novel titanium-zirconium adsorbent prepared by the titanium-zirconium ion solution in Example 1, Example 2 and comparative examples A and B, comprising the following steps:

[0067] S3 Weigh 20g of strongly basic anion exchange resin D201 produced by Hangzhou Zhengguang Resin Factory, add it to the zirconium-titanium ion solution, set the temperature at 50°C, and stir at 180rpm under closed conditions for 12 hours;

[0068] S4 then, add 15g sodium hydroxide and 15g sodium chloride, 21g sodium hydroxide and 21g sodium chloride, 28g sodium hydroxide and 28g chlorine respectively in the solution of embodiment 1, embodiment 2 and comparative example A, B Sodium chloride, 56g sodium hydroxide and 56g sodium chloride, maintain the amount of adding sodium hydroxide and sodium chloride to be 5% by mass. Set the temperature at 50°C and stir at a speed of 180rpm for 3 hours; after the stirring is completed, the resin is filtered out an...

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Abstract

The invention discloses a titanium-zirconium adsorbent and a preparation method and application thereof, and belongs to the field of wastewater treatment and environmental functional materials, the preparation method comprises the following steps: S1, dissolving TiCl4 in an ethanol-concentrated hydrochloric acid mixed solution; s2, adding ZrOCl2.8H2O powder and water into the solution obtained in the step S1, stirring the mixture till the ZrOCl2.8H2O powder is dissolved to generate a zirconium-titanium ion solution, wherein the amount of ethanol in the ethanol-concentrated hydrochloric acid mixed solution is controlled, so that the conductivity of the zirconium-titanium ion solution is smaller than 60 mS / cm; s3, adding the pretreated resin into the zirconium-titanium ion solution in the step S2, and stirring the mixture to obtain a resin solution loaded with zirconium and titanium; s4, adding a precipitant and a transformation agent into the zirconium and titanium loaded resin solution, stirring and filtering the solution, and washing a solid to obtain the titanium zirconium adsorbent. According to the one-step method, the titanium and zirconium are simultaneously loaded in a resin pore channel by a method of adjusting the solution conductivity, so that the preparation steps are simplified, the reaction period is shortened, and the loading rate of titanium and zirconium bimetals is improved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and environmental functional materials, and more specifically relates to a novel titanium-zirconium adsorbent with simple process and its preparation method and application. The titanium-zirconium adsorbent can be applied to copper in heavy metal wastewater or electroplating wastewater Ions, pyrophosphate, copper pyrophosphate and other pollutants are removed, and copper and phosphorus pollutants are adsorbed simultaneously. Background technique [0002] Metal oxides and hydrated metal oxides, such as metal zirconia, metal titania, etc., have been widely studied as heavy metal adsorbents. A large number of studies have shown that nano-sized metal oxides have a large specific surface area and abundant hydroxyl functional groups on the surface, which can resist the interference of various coexisting salt ions. Therefore, metal oxides not only have high adsorption capacity for heavy metals, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/22B01J20/30C02F1/28C02F101/10C02F101/20C02F103/16
CPCB01J20/0211B01J20/22C02F1/285C02F2101/105C02F2101/20C02F2103/16Y02W10/37
Inventor 花铭胡煜宋学玮潘丙才张炜铭吕路
Owner NANJING UNIV
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