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Lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication, their preparation methods, phosphorus-fixing method and phosphorus-fixing grid plate

A coating material and eutrophication technology, applied in chemical instruments and methods, polluted waterways/lakes/ponds/rivers treatment, water pollutants, etc., can solve problems such as destroying the water body system and affecting the exchange of mud and water substances, Achieve the effects of simple preparation process, strong phosphorus binding ability and strong operability

Inactive Publication Date: 2018-12-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above materials also have defects, such as: with the failure of the original materials, continuous paving is required, which will lead to continuous accumulation at the bottom of the water body, affect the exchange of mud and water substances, and destroy the original water body system

Method used

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  • Lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication, their preparation methods, phosphorus-fixing method and phosphorus-fixing grid plate
  • Lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication, their preparation methods, phosphorus-fixing method and phosphorus-fixing grid plate
  • Lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication, their preparation methods, phosphorus-fixing method and phosphorus-fixing grid plate

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Experimental program
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preparation example Construction

[0046] The present invention controls the preparation method of the lanthanum-loaded coating material of lake eutrophication, and the steps are as follows:

[0047] Step 1, adding 100-200ml of acetic acid with a mass percentage of 10-20% to every 1.50-2.50 grams of chitosan, until the chitosan is fully dissolved to obtain solution 1;

[0048] Step 2, add 0.05-0.15mol / L lanthanum nitrate solution to solution 1, and stir until fully dispersed to obtain solution 2, wherein the volume ratio of solution 1 to lanthanum nitrate solution is (1:7)-(1: 12);

[0049] Step 3, adding ammonia water with a mass percentage of 20-30% to the solution 2 to precipitate colloids in the solution 2 until the colloids are completely precipitated, and then separate the precipitated colloids, and the obtained colloids are lanthanum-loaded coating materials.

[0050] The present invention controls the preparation method of the phosphorus fixing material of lake eutrophication, comprises the following s...

Embodiment 1

[0069] The preparation process of the phosphorus-fixing grid plate of the present embodiment is as follows:

[0070] Add 100ml of acetic acid with a mass percentage of 10% to every 1.50 grams of chitosan, and wait for the chitosan to fully dissolve to obtain solution 1; add 0.05mol / L lanthanum nitrate solution to solution 1, and stir until fully dispersed to obtain a solution 2. Among them, the volume ratio of solution 1 to lanthanum nitrate solution is 1:7; add ammonia water with a mass percentage of 20% to solution 2 to precipitate the lanthanum-loaded coating material generated in solution 2, and obtain The suspension with the lanthanum-loaded coating material is left to stand, the suspension is layered, the water in the upper layer is separated, and the lower colloid is obtained, which is the lanthanum-loaded coating material of the present invention. Add the activated carbon that has been ultrasonically washed into the lanthanum-loaded coating, take it out after stirring ...

Embodiment 2

[0073] The preparation process of the phosphorus-fixing grid plate of the present embodiment is as follows:

[0074] To every 2.50 grams of chitosan, add 200ml of acetic acid with a mass percentage of 20%, until the chitosan is fully dissolved to obtain solution 1; add 0.15mol / L lanthanum nitrate solution to solution 1, and stir until fully dispersed to obtain a solution 2. Among them, the volume ratio of solution 1 to lanthanum nitrate solution is 1:12; 30% by mass of ammonia water is added to solution 2 to precipitate the lanthanum-loaded coating material in solution 2, and the lanthanum-loaded coating material is obtained after complete precipitation. The suspension of the type coating material, and then the suspension is left to stand, the suspension is layered, the water in the upper layer is separated, and the lower colloid is obtained, which is the lanthanum-loaded coating material of the present invention. Add activated carbon that has undergone ultrasonic water washin...

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Abstract

The invention mainly relates to the field of water pollution treatment and control and relates to a lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication,their preparation methods, a phosphorus-fixing method and a phosphorus-fixing grid plate. In the preparation of the lanthanum-supported coating material, acetic acid is added to chitosan such that thechitosan is fully dissolved to obtain solution 1; lanthanum nitrate solution is added to the solution 1 to obtain solution 2 after full dispersion; ammonia water is added to the solution 2 such thatcolloid is separated out from the solution 2, and the separated colloid is the lanthanum-supported coating material. The lanthanum-supported coating material prepared herein can react with phosphatesand convert them into LaPO4, thereby arriving at phosphorus fixation; the preparation method of the lanthanum-supported coating material is simple and handy.

Description

technical field [0001] The invention mainly focuses on the field of pollution control and prevention of water bodies, and relates to a lanthanum-loaded coating material for controlling lake eutrophication, a phosphorus-fixing material and a preparation method, a phosphorus-fixing method and a phosphorus-fixing grid plate. Background technique [0002] According to the monitoring results of the 16th issue of the 2018 National Weekly Report on Water Quality Monitoring of Key Sections in Major River Basins, among the 148 automatic water quality monitoring sections in major water systems across the country, the water quality of Grade III and below accounted for about 45.2% of the total monitored water bodies. Poor water quality is mainly caused by changes in permanganate index, ammonia nitrogen and dissolved oxygen. And the data in the regular press conference held by the Ministry of Ecology and Environment in April 2018. As of the end of 2017, more than 2,000 black and odorous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F101/10
CPCC02F1/58C02F2101/105C02F2103/007
Inventor 许晟硕柳雪迎苗碧蓉刘翼瑄杨生炯金鹏康
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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