Functional filler for repairing phosphorus in riverway as well as preparation method and use method of functional filler

A technology for functional fillers and river channels, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. Good adsorption rate and good hydrophilicity

Active Publication Date: 2021-03-26
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its adsorption phosphorus removal rate needs to be further improved

Method used

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  • Functional filler for repairing phosphorus in riverway as well as preparation method and use method of functional filler
  • Functional filler for repairing phosphorus in riverway as well as preparation method and use method of functional filler
  • Functional filler for repairing phosphorus in riverway as well as preparation method and use method of functional filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The model of the polyurethane filler in this embodiment is TPU481; the tensile strength is 0.14 MPa, the elongation at break is 150%, and the contact angle is 80°.

[0067] (1) Stir 0.02mol / L lanthanum chloride and 0.04mol / L ferric chloride solution to obtain a mixed solution, soak the polyurethane sponge in the solution for 20min with a filling rate of 75%, to obtain a loaded sponge filler; wherein lanthanum ions and iron ions The molar ratio is 0.5:1;

[0068] (2) Take out the loaded sponge filler after soaking and put it into a vacuum freeze dryer, vacuumize it under the preheat pump for 20 minutes; dry the filler at -50°C for 24 hours to ensure sufficient loading of the phosphorus adsorbent;

[0069] (3) After taking out the lyophilized and loaded sponge filler, place it at room temperature for 1 hour; put the filler in an oven and dry it at 115°C for 14 hours to evaporate water.

[0070] (4) Take out and dry the sponge filler and place it at room temperature for 0...

Embodiment 2

[0074] The type of polyurethane filler selected in this embodiment is TPU70A, the tensile strength is 0.16MPa, the elongation at break is 200%, and the contact angle is 70°;

[0075] (1) Stir 0.02mol / L neodymium chloride and 0.04mol / L ferric chloride solution to obtain a mixed solution, soak the polyurethane sponge in the solution for 30min with a filling rate of 70%, to obtain a loaded sponge filler;

[0076] (2) Take out the stuffing after soaking and put it into a vacuum freeze dryer, and evacuate it under the preheat pump for 30 minutes; dry the stuffing at -40°C for 30 hours to ensure the full loading of the phosphorus adsorbent; the molar ratio of neodymium ions to iron ions 1:1;

[0077] (3) After taking out the lyophilized and loaded sponge packing, place it at room temperature for 0.5h; put the packing in an oven and dry at 105°C for 12h to evaporate water.

[0078] (4) Take out the loaded sponge filler after drying and place it at room temperature for 1 hour; add wa...

Embodiment 3

[0082] The type of polyurethane filler used in this embodiment is TPU80A; the tensile strength is 0.16MPa, the elongation at break is 200%, and the contact angle is 70°.

[0083] (1) Stir 0.02mol / L cerium chloride and 0.04mol / L ferric chloride solution to obtain a mixed solution, soak polyurethane sponge in the solution for 40min with a filling rate of 80%, to obtain a loaded sponge filler.

[0084] (2) Take out the filler after soaking and put it into a vacuum freeze dryer, vacuumize it under the preheat pump for 10 minutes; dry the filler at -60°C for 24 hours to ensure sufficient loading of the phosphorus adsorbent;

[0085] (3) After taking out the lyophilized and loaded sponge packing, place it at room temperature for 1 hour; put the packing in an oven and dry at 105°C for 14 hours to evaporate water.

[0086] (4) Take out the loaded sponge filler after drying and place it at room temperature for 1 hour; add water 20 times the volume of the loaded sponge filler to the fil...

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Abstract

The invention relates to riverway phosphorus restoration, and in particular, relates to a functional filler for repairing phosphorus in riverway and a preparation method of the functional filler. Thefunctional filler comprises the raw materials: polyurethane filler, lanthanide-series metal chloride and ferric chloride; the lanthanide-series metal chloride and the ferric chloride are mixed, then the polyurethane filler is soaked in the mixed solution, taken out, subjected to cold drying, dried, cleaned and dried again, and the functional filler is obtained. The prepared functional filler lanthanide is combined with an easily available iron element and a polyurethane filler with a huge specific surface area for synergistic phosphorus removal, and the phosphorus removal rate of river restoration is remarkably increased; meanwhile, the filler is renewable, the cost of a phosphorus removal material is reduced, adsorbed phosphorus-containing substances can also be collected, and recycling of resources is achieved.

Description

technical field [0001] The invention relates to river channel phosphorus repair, in particular to a functional filler for river channel phosphorus repair and a preparation method. Background technique [0002] Our country's annual sewage discharge far exceeds the environmental capacity, and a large number of rivers have been seriously polluted and lost their drinking water function. The river pollutants are mainly organic nitrogen and phosphorus. Different types of organic reducing nitrogen and phosphorus substances will be aerobically decomposed by microorganisms in the water body, resulting in a gradual decrease in the dissolved oxygen concentration in the water body, deterioration of water quality, and black and odorous water bodies. However, at present, river restoration mainly focuses on denitrification treatment, and there are few studies on phosphorus removal. In fact, the abundant phosphorus in the water body will cause the rapid reproduction of green plants and mic...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/58C02F3/00C02F101/10
CPCC02F1/28C02F1/58C02F3/00C02F2101/105Y02A20/402
Inventor 冯华军陈禹杞汪锐肖咪沈东升汪美贞徐颖峰
Owner ZHEJIANG GONGSHANG UNIVERSITY
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