A bimetal anti-wind and wave-type phosphorus-locking material and its preparation method and application

An anti-wave and bimetallic technology, applied in the field of water pollution control, can solve the problems of eutrophication and pollution of water bodies, and achieve the effect of alleviating the degree of eutrophication, broad application prospects, and natural non-toxic ecological safety

Active Publication Date: 2021-03-09
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the severe pollution of endogenous phosphorus in the above lakes and the serious water eutrophication caused by continuous release, the present invention proposes a solution for the treatment of eutrophic lakes based on the passivation of endogenous phosphorus in sediment

Method used

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  • A bimetal anti-wind and wave-type phosphorus-locking material and its preparation method and application
  • A bimetal anti-wind and wave-type phosphorus-locking material and its preparation method and application
  • A bimetal anti-wind and wave-type phosphorus-locking material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]The dolomite attapulgite powder in the powder state is granulated by drum, and water is used as a granulating agent (with a particle size of 1-2mm), wherein the mass content of the attapulgite is 30%, and the mass content of dolomite is 10%. The granulated dolomite attapulgite clay was calcined at 700 °C for 2 h in a high-temperature calcination furnace. Weigh a certain mass of aluminum chloride hexahydrate and set the volume to 100 mL, and prepare 1mol / L aluminum chloride solution, 2 mol / L aluminum chloride solution, 0.1mol / L lanthanum chloride solution, 0.2mol / L Lanthanum solution, 0.3mol / L lanthanum chloride solution, 2 mol / L aluminum chloride and 0.1mol / L lanthanum chloride mixed solution, 2 mol / L aluminum chloride and 0.2mol / L lanthanum chloride mixed solution, 2 mol / L aluminum chloride and 0.3mol / L lanthanum chloride mixed solution and 2 mol / L aluminum chloride and 0.4mol / L lanthanum chloride mixed solution. Add the materials that have been calcined at high tempe...

Embodiment 2

[0039] The dolomite attapulgite powder in the powder state is granulated by drum, and water is used as a granulating agent (with a particle size of 1-2mm), wherein the mass content of the attapulgite is 40%, and the mass content of dolomite is 30%. The granulated dolomite attapulgite clay was calcined at 800 °C for 2 h in a high-temperature calcination furnace. Weigh a certain mass of aluminum chloride hexahydrate and set the volume to 100 mL, and prepare a mixed solution of 2mol / L aluminum chloride and 0.16mol / L lanthanum chloride. Add the materials that have been calcined at high temperature to each of the above mixed solutions according to the ratio of water to soil mass ratio of 1:3, place them in a shaker, shake fully at 27°C (160rpm) for 1 hour, let stand at room temperature for one day, and then discard Remove the upper liquid, age the lanthanum-aluminum-loaded material in an oven at 70°C for 24 h, cool to room temperature, and finally wash the material with water until...

Embodiment 3

[0041] The dolomite attapulgite powder in the powder state is granulated by drum, and water is used as a granulating agent (particle size is 1-2mm), wherein the mass content of attapulgite is 50%, and the mass content of dolomite is 20%. The granulated dolomite attapulgite clay was calcined at 600 °C for 2 h in a high-temperature calcination furnace. Weigh a certain mass of aluminum chloride hexahydrate and set the volume to 100 mL, and prepare a mixed solution of 2mol / L aluminum chloride and 0.2mol / L lanthanum chloride. Add the material that has been calcined at high temperature to the above mixed solution according to the ratio of water to soil mass ratio of 1:2, place it in a shaker, shake it fully at 25°C (160rpm) for 1 hour, let it stand at room temperature for one day, and then discard it For the upper liquid, the lanthanum-aluminum-loaded material was aged in an oven at 50°C for 24 h, cooled to room temperature, and finally the material was washed with water until the s...

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Abstract

The invention discloses a bimetal wind wave resistance phosphorus locking material which is prepared by the method including the steps: granulating powdery dolomite attapulgite clay and then performing high-temperature heat treatment to obtain a semi-finished product; soaking the semi-finished product into lanthanum chloride and aluminum chloride mixed solution for loading; performing low-temperature stabilizing treatment, cleaning and drying to obtain the bimetal wind wave resistance phosphorus locking material. The material is high in phosphorus fixation capacity and has remarkable wind waveresistance, and lanthanum and aluminum phosphorus fixation functions in pH (potential of hydrogen) value change of different water environments can be transformed, so that complete phosphorus fixation capacity is realized. The material is wide in material drawing, low in price, natural, non-toxic and high in ecological safety and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and relates to a bimetal anti-wind and wave phosphorus-locking material, a preparation method and application thereof. Background technique [0002] Eutrophication of lakes has become a global water environment problem. Pass to 138 more than 10km 2 The lake survey found that 85.4% of the lakes are in a state of eutrophication, and 40.1% of the lakes are in a state of severe eutrophication. Therefore, it is urgent to take corresponding measures to control and restore the polluted water bodies, and controlling the concentration of phosphorus in lakes is considered to be the key to the control of eutrophication in lakes. However, relevant studies have shown that even after exogenous phosphorus pollution in lakes is effectively controlled, eutrophication of lake water can still last for decades. The reason is that there is an "inner ghost" in the lake, that is, the release of endog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F11/00C02F101/10C02F101/30
CPCC02F1/00C02F11/00C02F11/008C02F2101/105C02F2101/30C02F2103/007C02F2209/06
Inventor 尹洪斌
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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