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A combined in-situ remediation method for polluted surface water environment

A remediation method and technology for surface water, applied in water pollutants, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of reduction, high preparation cost, waste of zirconium, etc. Enhance phosphorus fixation ability and good conversion efficiency

Active Publication Date: 2021-09-28
SHANGHAI OCEAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the preparation method of the granular zirconium-modified zeolite proposed in this invention patent is a serious waste of zirconium, which leads to higher preparation costs of the granular zirconium-modified zeolite
In addition, the method proposed in the invention patent (application number CN201610168601.2) is mainly aimed at polluting sediment, and cannot directly purify pollutants in the overlying water of surface water bodies.
In addition, adding a large amount of powdered zirconium-modified zeolite and granular zirconium-modified zeolite to the surface water body will easily reduce the depth of the water body above the surface water body and cause water blockage, so it is urgent to find zirconium oxide directly from the surface water body / hydroxide carrier to overcome the defects of surface water depth drop caused by the application of traditional zirconium-based passivators
It can be seen that the current method of controlling the release of sediment pollutants by zirconium-based passivators at home and abroad cannot well realize the in-situ restoration of the contaminated sediment of surface water bodies and the overlying water body. The defect of zirconium-based passivator in-situ passivation technology, in order to better realize the restoration of the water environment of surface water bodies, has become an important task of water environment protection at this stage

Method used

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  • A combined in-situ remediation method for polluted surface water environment

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Embodiment 1

[0039] This embodiment relates to an in-situ combined restoration method for polluted surface water environment, which specifically includes the following steps:

[0040] (1) Preparation of zirconium modified bottom mud

[0041] Get 20g of the surface sediment of the river course (by dry weight) and add it to the Erlenmeyer flask, then add 4g of zirconium oxychloride octahydrate, then add 50mL of deionized water, and place the container in a constant temperature water bath at 25°C Stir and react in an oscillator for 0.5 h; add 1 mol / L NaOH solution dropwise to the above mixed solution until the pH of the mixed solution is 10, and then obtain the zirconium-modified bottom sludge after washing and drying.

[0042] (2) Test the adsorption performance of zirconium modified bottom mud

[0043] Prepare a phosphate solution with a phosphorus concentration of 4mg P / L, and adjust the pH value of the phosphate to 7, then pipette 25mL of the phosphate solution and place it in a conical ...

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Abstract

The invention discloses an in-situ combined restoration method for polluted surface water environment; comprising: (1) preparing powdered zirconium modified zeolite, particle zirconium modified zeolite and powdered zirconium modified bottom mud; (2) adding powdered zirconium modified zeolite Bottom mud and with the help of mechanical stirring or hydraulic stirring to complete the improvement of powder zirconium modified bottom mud to surface bottom mud; (3) put in an appropriate amount of powder zirconium modified zeolite and granular zirconium modified zeolite to form a bottom mud covering layer; (4) The packaged particle zirconium modified zeolite is combined with the floating bed to construct the floating island system. The advantage of the present invention is that: the zirconium modified bottom sludge mentioned in the present invention is more ecological and environmentally friendly compared with the traditional powder zirconium modified zeolite; the present invention realizes the simultaneous preparation of powder and granular zirconium modified zeolite, and the present invention mentioned Powdered zirconium-modified zeolite has a stronger ability to passivate phosphorus; the present invention comprehensively applies the sediment active covering / improvement combination technology and the zirconium-modified particle zeolite floating island technology to repair the water body in situ, which has better repair effect, more cost-effective economic cost, and more In line with the concept of sustainable development.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an in-situ combined restoration method for a polluted surface water environment. Background technique [0002] In recent years, with the increase in the amount of pollutants discharged by humans into surface water bodies, especially the discharge of a large amount of nitrogen and phosphorus-containing wastewater generated by human activities, the eutrophication of surface water bodies has become more and more serious. Therefore, it is more and more important to research and develop efficient and economical in-situ purification methods for polluted surface water environment. At present, ecological restoration technology is the most widely used method for in-situ purification of pollutants in surface water bodies. However, there are some defects in ecological restoration, such as aquatic plants are greatly affected by the external environment, dead aqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00B01J20/16B01J20/28B01J20/30C02F101/10C02F101/16
CPCB01J20/165B01J20/28014B01J20/28016C02F11/00C02F2101/105C02F2101/16
Inventor 林建伟俞阳王艳赵钰颖吴小龙詹艳慧何思琪管卫兵梁舒静
Owner SHANGHAI OCEAN UNIV
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