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Preparation method and application of a kind of nanoparticle-loaded foamed granular carbon adsorbent for phosphorus removal

A technology of nano-particles and expanded particles, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the waste of activated carbon resources, secondary environmental pollution, equipment corrosion, etc. problems, to achieve the effect of improving adsorption capacity, improving adsorption effect, and simple operation

Active Publication Date: 2017-12-12
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the preparation process, the chemical reagents are highly corrosive to the equipment, the secondary environmental pollution is serious, and chemicals are easy to remain in the activated carbon.
In addition, since most activated carbon is a powdery substance, it is difficult to separate from the solution and recycle it after adsorption, and it is also difficult to fill the adsorption column as a filler, resulting in a waste of activated carbon resources.

Method used

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  • Preparation method and application of a kind of nanoparticle-loaded foamed granular carbon adsorbent for phosphorus removal
  • Preparation method and application of a kind of nanoparticle-loaded foamed granular carbon adsorbent for phosphorus removal
  • Preparation method and application of a kind of nanoparticle-loaded foamed granular carbon adsorbent for phosphorus removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 Preparation of amino starch prepolymer

[0035]Put 100g of starch into 180g of distilled water, carry out hydrolysis in the environment of pH 3.5, the hydrolysis temperature is 65°C, then add 5g of paraformaldehyde, react for 10min, then add 22.5g of urea for hydroxymethylation pre-shrinkage reaction for 30min, and finally raise the temperature To 85°C, add 50g of polyvinyl alcohol solution with a mass fraction of 15%, keep it warm for 20min, and cool down naturally to obtain the amino starch prepolymer.

Embodiment 2

[0036] Example 2 Preparation of foamed granular charcoal adsorbent for phosphorus removal loaded with nanoparticles

[0037] (1) Remove impurities from the crop straw raw material (wheat straw is used in this example), air-dry until the moisture content is 11%-13%, and pass through a 40-mesh sieve after crushing;

[0038] (2) After mixing 1000g of crushed wheat straw powder with 8g of Tween-80 and 2g of silane coupling agent KH-560 evenly, mix them at 45°C and 100rpm for 20min to obtain the surface-modified wheat straw powder material;

[0039] (3) 1000g of the amino starch prepolymer obtained in Example 1, 5g of sodium bicarbonate and 5g of azodicarbonamide, 50g of nano-SiO 2 , after being mechanically stirred evenly, place it in an ultrasonic wave with a power of 100w for 10 minutes to obtain an amino starch adhesive with evenly dispersed nanoparticles;

[0040] (4) Add 500g of modified wheat straw powder material and 50g of amino starch binder with evenly dispersed nanopar...

Embodiment 3

[0045] Example 3 Effect of Nanoparticles on Phosphorus Removal Performance of Foamed Granular Carbon

[0046] In order to study the influence of nanoparticles on the phosphorus removal performance of foamed granular carbon, this embodiment is divided into three groups,

[0047] The preparation method of the experimental group is as follows:

[0048] (1) Remove impurities from the corn stalks, air-dry and crush them, with a moisture content of 11%-13%, and pass through a 40-mesh sieve;

[0049] (2) After mixing 1000g of crushed corn stalk powder with 5g of sodium dodecylbenzenesulfonate and 5g of polyoxyethylene-polyoxypropylene copolymer, mix them at a temperature of 65°C and a speed of 200rpm for 10 minutes to obtain a surface Modified corn stalk powder material;

[0050] (3) 1000g of the amino starch prepolymer obtained in Example 1, 3.5g of sodium bicarbonate and 6.5g of n-pentane, 50g of nano-SiO 2 After mechanically stirring with 50g of nano-iron oxide, place it in an ...

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Abstract

The invention discloses a preparing method of a dephosphorization adsorbent carrying nano particle foamed carbon particles.The preparing method comprises the specific steps that a wood fiber biomass raw material is air-dried, smashed and then added with a surfactant, and a surface-modified wood fiber material is obtained; then, an amidogen starch adhesive is added for hot-press forming, then the mixture is put in a tube furnace to be carbonized, and the dephosphorization adsorbent carrying nano particle foamed carbon particles is obtained.According to the preparing method, the defect that adsorbing materials cannot be recycled is overcome, the amidogen starch adhesive evenly coats straw in a homogeneous phase mode so as to change the surface chemical property of carbon particles in the carbonization process, and thus the adsorption capability of the carbon particles on phosphate radical ions is improved.The adsorbent is low in cost and easy to use and operate; in addition, secondary pollution can be avoided, solid-liquid separation is easy to achieve, and the adsorbent can be recycled repeatedly and is suitable for treating phosphorus-containing wastewater.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a preparation method and application of a foamed granular charcoal phosphorus-removing adsorbent loaded with nanoparticles. Background technique [0002] Phosphorus is one of the key nutrient elements leading to eutrophication of water bodies. Excessive phosphorus content in water bodies will lead to eutrophication, causing changes in the structure and function of water ecosystems, deterioration of water quality, landscape destruction, and decline in biodiversity. High phosphorus content causes algae to multiply and accumulate in large numbers, and the chemical substances produced by excessively proliferated cyanobacteria directly affect the safety of domestic water and industrial water. [0003] Phosphorus in environmental water mainly comes from domestic sewage, industrial wastewater and farmland drainage, and its phosphorus content has always been a matter of great concern ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/20C02F1/28
CPCB01J20/20B01J20/28016B01J20/28045B01J2220/4806B01J2220/4812B01J2220/485C02F1/283
Inventor 孙恩惠黄红英常志州艾玉春武国峰靳红梅徐跃定
Owner JIANGSU ACAD OF AGRI SCI