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Preparation method and application of nanometer aluminum oxide modified by copper reagent

A nano-alumina and copper reagent technology, applied in the field of water treatment, can solve the problems of poor selectivity and low treatment efficiency, and achieve the effects of high surface activity, improved adsorption performance and selectivity, and simple preparation method

Active Publication Date: 2016-12-14
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The key to treating wastewater by adsorption method depends on the adsorption performance of adsorption materials. There are many water treatment materials in sewage treatment, but due to the problems of low treatment efficiency and poor selectivity, it is necessary to study new high-efficiency and low-cost water treatment materials. appears to be particularly important

Method used

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  • Preparation method and application of nanometer aluminum oxide modified by copper reagent
  • Preparation method and application of nanometer aluminum oxide modified by copper reagent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of the nano alumina modified by embodiment 1 copper reagent

[0034] A. Activation stage:

[0035] ①Weigh 5g of nano-alumina material and disperse it in 30mL of mixed solution containing hydrochloric acid and potassium nitrate. The solid-to-liquid ratio of the reaction system, that is, the g / mL of nano-alumina / mixed solution is 1:6; For: hydrochloric acid 0.001mol / L, KNO 3 It is 0.035mol / L.

[0036] ②Put the above system solution under the conditions of ultrasonic frequency 40KHz and ultrasonic power 250W to ultrasonically disperse for 10-15min, filter, wash with secondary water until neutral, and set aside.

[0037] B. Modification modification:

[0038] ①The modification is carried out in the presence of surfactants, and the reaction temperature is 50°C.

[0039] ②Weigh 3g of activated nano-alumina material and suspend in 30mL mixed solution containing sodium lauryl sulfate and copper reagent. The solid-liquid ratio of the reaction system, that is,...

Embodiment 2

[0043] The preparation of the nano-alumina of embodiment 2 copper reagent modification

[0044] The activation stage is the same as in Example 1.

[0045] Modifications:

[0046] ①The modification is carried out in the presence of surfactants, and the reaction temperature is 70°C.

[0047] ②Weigh 3g of activated nano-alumina material and suspend in 30mL mixed solution containing sodium lauryl sulfate and copper reagent. The solid-liquid ratio of the reaction system, that is, the g / mL of activated nano-alumina / mixed solution is 1 : 10; the solute concentration in the mixed solution is: sodium lauryl sulfate is 2g / L, and the copper reagent concentration is 10.0g / L.

[0048] ③ Place the above system solution under the conditions of ultrasonic frequency 40KHz, ultrasonic power 250W, heating power 400W for 15min.

[0049] ④ After the ultrasonic impregnation, in order to further ensure the thorough impregnation, the system was kept in a constant temperature water bath at 70°C for...

Embodiment 3

[0051] Example 3 Copper Reagent Modified Nano-alumina Adsorption and Removal of Cadmium Ions in Water

[0052] The nano-alumina modified with the copper reagent prepared in Example 1 adsorbs and removes cadmium ions in water. Weigh 50 mg of adsorbent and add it into a cadmium nitrate solution containing cadmium ions at a concentration of 2 mg / L. The pH of the solution is 9 and the volume is 200 mL. Shake in a constant temperature water bath shaker at 25°C for 1 hour. After the oscillation, centrifuge, accurately pipette 10.0mL of the solution, measure the concentration of cadmium ions in the removed solution with an atomic absorption spectrometer, and calculate the adsorption and removal rate of cadmium ions in the water according to the difference between the concentration of cadmium ions before and after adsorption. The calculated removal rate of cadmium ions in water is above 99%.

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Abstract

The invention relates to a preparation method and application of nanometer aluminum oxide modified by a copper reagent, and belongs to the technical field of functional materials and water treatment. The method specifically includes the steps of conducting modification reaction between active groups on surfaces of nanometer aluminum oxide and organic matter under the effect of a surface active agent with nanometer aluminum oxide as the carrier and the copper reagent as the functional reagent, and wrapping an organic molecular film on surfaces of nanoparticles. Organic matter contains functional groups with strong coordination complexation capacity for cadmium ions, and the modified nanometer material can remarkably improve the adsorption performance and adsorption selectivity for cadmium ions in water. The nanometer absorbent obtained through the method overcomes the defects that a pure nanometer aluminum oxide carrier is small in adsorption capacity and poor in selectivity, and cadmium ions in a water solution can be effectively removed; the adsorption material has the advantages of being easy to prepare, convenient to operate, good in selectivity, large in adsorption capacity, good in removal effect and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for preparing copper reagent-modified nano-alumina and its application for removing cadmium ions in water. Background technique [0002] Cadmium is one of the most toxic heavy metals. Cadmium is widely used in electroplating, chemical industry, electronics and nuclear industries. According to the source of cadmium-containing wastewater, cadmium-containing wastewater can be roughly divided into the following categories: cadmium-containing mine and smelting wastewater, nickel-cadmium battery production wastewater, cadmium compound industrial wastewater, and electroplating cadmium-containing wastewater. The composition of mine and smelting wastewater is relatively complex. In addition to cadmium, it also contains metal ions such as copper, lead, zinc, and nickel. If it is discharged directly without treatment, it will cause serious pollution to soil and water. Duri...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/02B01J20/08B01J20/28004C02F1/281
Inventor 连宁何锦涛唐江宏贺香红赵德建
Owner JIANGSU UNIV OF TECH