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Nitrogen modified nanometer titanium dioxide and Phanerochete chrysosporium composite adsorbent, and its preparation method and application

A technology of nano-titanium dioxide and chrysosporium plain leather, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of difficult recovery, easy loss, poor effect, etc., to improve treatment efficiency, Safe and environmentally friendly recycling, solving the effect of easy loss

Inactive Publication Date: 2012-04-25
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, titanium dioxide (TiO 2 ) is easy to be lost and difficult to recycle during use, so it is often loaded on various carriers, such as diatomaceous earth, bamboo charcoal, and activated carbon. These loading materials generally have a large specific surface area and can be better combined with titanium dioxide. , to improve its photocatalytic performance, but less effective in dealing with heavy metals

Method used

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  • Nitrogen modified nanometer titanium dioxide and Phanerochete chrysosporium composite adsorbent, and its preparation method and application
  • Nitrogen modified nanometer titanium dioxide and Phanerochete chrysosporium composite adsorbent, and its preparation method and application
  • Nitrogen modified nanometer titanium dioxide and Phanerochete chrysosporium composite adsorbent, and its preparation method and application

Examples

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Effect test

Embodiment 1

[0033] The nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent of the present invention includes Phanerochaete chrysosporium balls, the hyphae of Phenerochaete chrysosporium balls are loaded with nitrogen-modified nano-titanium dioxide and entangled with seaweed Calcium acid and nitrogen-modified nano-titanium dioxide were mainly distributed in the interior of the Phanerochaete chrysosporium spheres; calcium alginate was mainly distributed on the surface of the Phanerochaete chrysosporium spheres. The composite adsorbent is in the shape of microspheres, the diameter of the microspheres is 1cm-2cm, and the water content is 97%±0.5%.

[0034] The nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent of the present invention is prepared by the following method:

[0035] 1. Preparation of nitrogen-modified nano-titanium dioxide by sol-gel method: First, weigh 0.0705g of urea and place it in a beaker, add...

Embodiment 2

[0046] The nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent of the present invention includes Phanerochaete chrysosporium balls, the hyphae of Phenerochaete chrysosporium balls are loaded with nitrogen-modified nano-titanium dioxide and entangled with seaweed Calcium acid and nitrogen-modified nano-titanium dioxide were mainly distributed in the interior of the Phanerochaete chrysosporium spheres; calcium alginate was mainly distributed on the surface of the Phanerochaete chrysosporium spheres. The composite adsorbent is in the shape of microspheres, the diameter of the microspheres is 1cm-2cm, and the water content is 97%±0.5%.

[0047] The nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent of the present invention is prepared by the following method:

[0048] 1. The method of Example 1 was used to prepare nitrogen-modified nano-titanium dioxide.

[0049] 2. Take 0.8g of nitrogen-modified nan...

Embodiment 3

[0054] The nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent of the present invention can be used to remove cadmium and 2,4-dichlorophenol (2,4-DCP) in wastewater, comprising the following steps:

[0055] 1. Prepare the initial concentration of 2,4-dichlorophenol as 10mg / L, and the initial concentration of cadmium as 2mg / L, 5mg / L, 10mg / L, 20mg / L, 40mg / L, 80mg / L, 100mg / L , 100ml each of the 8 groups of simulated wastewater of 120mg / L, and adjust the pH to 6.

[0056] 2. Add 3 g of nitrogen-modified nano-titanium dioxide and Phanerochaete chrysosporium composite adsorbent prepared in Example 1 to the above-mentioned 8 groups of simulated wastewater, and place them in a shaking incubator at 37°C and 150 rpm / min. , reacted for 60h, and separated the solid phase and liquid phase after standing still to complete the adsorption.

[0057] The residual amounts of cadmium and 2,4-dichlorophenol in the treated wastewater samples were measured re...

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Abstract

The invention discloses a nitrogen modified nanometer titanium dioxide and phanerochete chrysosporium composite adsorbent, and its preparation method and application. The composite adsorbent comprises Phanerochaete chrysosporium pellets, mycelia of the Phanerochaete chrysosporium pellets is loaded with nitrogen modified nanometer titanium dioxide, and calcium alginate winds on the mycelia of the Phanerochaete chrysosporium pellets. The preparation method comprises the following steps: adding nitrogen modified nanometer titanium dioxide into a sodium alginate solution after calcining and sieving, and heating an obtained mixture so as to allow nitrogen modified nanometer titanium dioxide to decompose and dissolve; adding Phanerochaete chrysosporium spore suspension, and carrying out uniformstirring; dropwise adding a prepared mixed solution into a calcium chloride solution with a syringe so as to prepare embedding beads; transferring the embedding beads into Kirk inorganic nutrient solution for culture, and carrying out filtration and rinsing to obtain the composite adsorbent. The composite adsorbent provided in the invention can be used for removing cadmium and 2,4-dichlorophenol and has the advantages of high adsorption efficiency, good selectivity, low cost, convenience in separation and recovery, etc.

Description

technical field [0001] The invention relates to the field of biological materials and wastewater treatment, in particular to a composite adsorbent and its preparation method and application. Background technique [0002] With the rapid development of industry, the current environmental pollution problem is becoming more and more prominent, and compound pollution has gradually become a major problem that needs to be solved urgently at this stage. Different from single-factor pollution, compound-polluted wastewater is often difficult to treat due to its complex water quality, and many factors need to be considered in the process of treatment. Among the composite polluted wastewater, the composite polluted wastewater of heavy metals and organic matter accounts for a relatively large proportion, which is the focus of current research. [0003] The methods for treating heavy metal and organic compound polluted wastewater include adsorption method, enhanced coagulation method, ph...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 官嵩陈桂秋曾光明陈安伟尚翠范佳琦邹正军
Owner HUNAN UNIV
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