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A modified nanomaterial and its application in antimony-containing wastewater treatment

A wastewater treatment and nanotube technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of reducing pollutant treatment efficiency and weak adsorption capacity, and achieve improved removal The effect of increasing efficiency, adsorption capacity and removal rate

Inactive Publication Date: 2018-07-17
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional nano-TiO 2 The isoelectric point is between pH 4.5-6.5, and the isoelectric point is low, so its adsorption capacity is weak, thus reducing its treatment efficiency for pollutants

Method used

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  • A modified nanomaterial and its application in antimony-containing wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A humic acid-modified titanium dioxide nanotube used for the treatment of antimony-containing wastewater, the preparation method of which comprises the following steps:

[0040] (1) Take 20 mg of titanium dioxide nanotubes with a pipe diameter of 12-15nm and an inner diameter of 11-12nm and add them to 50ml of deionized water, and ultrasonically treat them to form a stable suspension of titanium dioxide nanotubes in the solution, and control the pH value to 6.8 -7.2.

[0041] (2) Add humic acid in the suspension of titanium dioxide nanotubes, the concentration of humic acid is 50ppm, put into shaking table and process 2h, the temperature of shaking table is 20 degrees Celsius, and the rotating speed is 150r / min, obtains humic acid modified Titanium dioxide nanotubes. Humic acid is fully modified to the surface of titanium dioxide nanotubes under the action of electrostatic attraction, and the negative charge density on the surface of titanium dioxide nanotubes increase...

Embodiment 2

[0047] The method for removing antimony in water by the humic acid-modified titanium dioxide nanotubes prepared in Example 1 may further comprise the steps:

[0048] (1) Add 20mg of humic acid-modified titanium dioxide nanotubes to 50ml 30ppm Sb 3+ or Sb 5+ solution, adsorption for 60min;

[0049] (2) The elution process of the humic acid-modified titanium dioxide nanotubes adsorbed with antimony: the humic acid-modified titanium dioxide nanotubes adsorbed with antimony were centrifuged, and the centrifuged solid was eluted with ethanol to remove the adsorbed on the humic acid. Antimony on phytic acid-modified titania nanotubes.

[0050] The antimony adsorption capacity of the humic acid-modified titanium dioxide nanotubes in this example is 75.4 mg / g, and the antimony removal rate can reach 100%.

Embodiment 3

[0052] A humic acid-modified titanium dioxide nanotube for antimony-containing wastewater treatment, the preparation method comprising the following steps: (1) taking 20 mg of titanium dioxide nanotubes with a pipe diameter of 12-15 nm and an inner diameter of 11-12 nm and adding 50 ml of deionized In water, it is subjected to ultrasonic treatment to form a stable suspension of titanium dioxide nanotubes in the solution, and the pH value is controlled to be 6.5-7.8.

[0053] (2) Add humic acid in the titanium dioxide nanotube suspension, the concentration of humic acid is 55ppm, put into shaker and handle 1h, the temperature of shaker is 25 degrees Celsius, and the rotating speed is 200r / min, obtains humic acid modified Titanium dioxide nanotubes. Humic acid is fully modified to the surface of titanium dioxide nanotubes under the action of electrostatic attraction, and the negative charge density on the surface of titanium dioxide nanotubes increases, and more functional group...

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Abstract

The invention provides an antimony-containing wastewater treatment method and in particular relates to a modified nano material. A preparation process of the modified nano material comprises the stepof adding humic acid into titanium dioxide nanotube suspension. The invention also provides a method for treating antimony-containing wastewater by utilizing humic acid modified titanium dioxide nanotubes. According to the invention, the humic acid is modified on the surfaces of the titanium dioxide nanotubes and used for adsorbing Sb<3+> or Sb<5+> in a water environment, antimony removal efficiency is obviously improved, removal cost is reduced, and the used material is non-toxic, harmless and environment-friendly.

Description

technical field [0001] The invention discloses a method for treating antimony-containing wastewater, in particular to a modified nanometer material and its application in the treatment of antimony-containing wastewater. Background technique [0002] Antimony has certain carcinogenicity. The existence of antimony in the water environment greatly threatens the safety of aquatic organisms and human beings. However, the removal effect of antimony in the water environment is not ideal at present, and it is difficult to remove Sb efficiently and simultaneously. 3+ and Sb 5+ It meets the water quality standard requirements of antimony, and has a good application prospect for engineering use. [0003] At present, there are mainly the following methods for the treatment of antimony in the water environment at home and abroad: precipitation method, adsorption method, pH adjustment, coagulation method, and electrochemical method. Among them, precipitation method and coagulation metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30B01J20/34C02F1/28C02F101/20
CPCB01J20/24B01J20/3475C02F1/286C02F2101/20C02F2303/16
Inventor 赵天慧汤智赵晓丽吴丰昌
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI