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Preparation method of oxygen-carrying and adsorbing composite functional material and application of oxygen-carrying and adsorbing composite functional material in water body remediation

A composite function and oxygen-carrying technology, which is applied in the field of environmental science and engineering, can solve the problems of aquatic animals and plants, high cost of water, oxygen consumption, etc., achieve high oxygen-carrying and oxygen-releasing capacity, increase dissolved oxygen in water, and slow down the release The effect of the risk

Active Publication Date: 2020-05-05
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under anaerobic conditions, it will cause the release of endogenous pollutants, including the release of phosphate, iron, manganese, sulfur and other compounds that are sensitive to the redox environment as the dominant pollutants, which will further aggravate the deterioration of water quality and cause water pollution. Continued pollution will accelerate eutrophication and even the outbreak of algal blooms, which in turn will lead to further deterioration of the anaerobic state of the water environment, forming a vicious circle
This vicious cycle of "water quality deterioration - anaerobic water body and bottom - release of endogenous pollutants" not only leads to the decline of aquatic animals and plants, hinders the restoration of water environment, but even threatens the safety of drinking water and human health
[0008] However, there are still technical bottlenecks in the market for bottom anaerobic in water environment, especially deep water bottom anaerobic and sediment anaerobic problems
The technologies commonly used in the market to improve bottom anaerobic can be divided into artificial aeration and hydraulic circulation. Artificial aeration includes surface aeration and deep aeration technology. The advantage is that it can quickly increase the dissolved oxygen in the water body, but the disadvantage is that it needs to consume Electric aeration equipment must operate continuously or intermittently. In practical applications, it is only suitable for small water bodies. The cost of large water areas is very high and it is not sustainable. Especially deep aeration often disturbs the sediment, causing a large amount of waste in the sediment Oxygen substances are resuspended, which consumes the oxygen in the water body instead, causing the dissolved oxygen to be lower than before the aeration after the aeration is stopped.
The hydraulic cycle includes two circulation methods, horizontal and vertical, which can exchange the water in the area with high dissolved oxygen and the water in the anaerobic area to improve the anaerobic problem at the bottom, but it often requires the continuous operation of high-power circulating water pumps. Applications are cost prohibitive and inefficient

Method used

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  • Preparation method of oxygen-carrying and adsorbing composite functional material and application of oxygen-carrying and adsorbing composite functional material in water body remediation
  • Preparation method of oxygen-carrying and adsorbing composite functional material and application of oxygen-carrying and adsorbing composite functional material in water body remediation
  • Preparation method of oxygen-carrying and adsorbing composite functional material and application of oxygen-carrying and adsorbing composite functional material in water body remediation

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Embodiment 1

[0058] A method for preparing an oxygen-carrying + adsorption composite functional material, comprising the steps of:

[0059] 1) Wash natural zeolite, bentonite and fly ash with deionized water respectively, dry at 105°C, grind through a 50-mesh sieve, and set aside;

[0060] Get the zeolite, bentonite, and fly ash after the above-mentioned treatment and add aluminum chloride aqueous solution respectively, and its solid-liquid ratio is 1:5 (solid unit is g, liquid unit is ml), and the concentration of aluminum chloride aqueous solution used is 1mol / L , pH is 8, soaked at 95°C for 24 hours, filtered, cooled the obtained residue, and dried; add sodium hydroxide aqueous solution to the dried material, and its solid-liquid ratio is 1:5 (solid unit is g, liquid unit is ml) , the concentration of the sodium hydroxide aqueous solution used is 1mol / L, shake and impregnate for 24h, filter, cool the obtained solid, dry, and set aside;

[0061] 2) get step 1) modified zeolite, bentonit...

Embodiment 2

[0065] This embodiment uses zeolite and fly ash to modify and prepare oxygen-carrying + adsorption composite functional materials, including the following steps:

[0066] 1) Natural zeolite, bentonite, and fly ash were washed with deionized water respectively, dried at 105°C, ground through a 100-mesh sieve, and set aside;

[0067] Get the zeolite, bentonite and fly ash after the above-mentioned treatment and add aluminum chloride aqueous solution respectively, the solid-liquid ratio is respectively 1:6 (solid unit is g, liquid unit is ml), the concentration of used aluminum chloride aqueous solution is 2mol / L, the pH is 8, 95 ℃ shaking impregnation for 24h, filtering, cooling the obtained residue, and drying; add sodium hydroxide aqueous solution to the dried material, and its solid-liquid ratio is 1:6 (solid unit is g, liquid unit is ml ), the concentration of aqueous sodium hydroxide solution used is 2mol / L, shake and soak for 24h, filter, cool the gained solid, dry, and s...

Embodiment 3

[0072] This embodiment uses zeolite and fly ash to modify and prepare oxygen-carrying + adsorption composite functional materials, including the following steps:

[0073] 1) Natural zeolite, bentonite, and fly ash were washed with deionized water respectively, dried at 105°C, ground through a 150-mesh sieve, and set aside;

[0074] Get the zeolite, bentonite, and fly ash after the above-mentioned treatment and add aluminum chloride aqueous solution respectively, and its solid-liquid ratio is respectively 1:7 (solid unit is g, liquid unit is ml), and the concentration of used aluminum chloride aqueous solution is 3mol / L, pH is 7, oscillating and impregnating at 95°C for 24h, filtering, cooling the obtained residue, and drying; adding sodium hydroxide aqueous solution to the dried material, and its solid-liquid ratio is 1:7 (solid unit is g, liquid unit is ml), the concentration of aqueous sodium hydroxide solution used is 3mol / L, shake and soak for 24h, filter, cool the result...

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Abstract

The invention provides a preparation method of an oxygen-carrying and adsorbing composite functional material and application of the oxygen-carrying and adsorbing composite functional material in water body remediation. The oxygen-carrying and adsorbing composite functional material is used for repairing water body, and at the same time, pollutants such as endogenous nitrogen and phosphorus in thewater body can be efficiently adsorbed, and the problems of water body anaerobism and the like are solved; moreover, the material is low in cost and good in ecological safety, and the preparation method of the oxygen-carrying and adsorbing composite functional material comprises the following steps: (1) firstly carrying out dipping modification on a base material by using a metal cation salt solution, filtering and drying, then carrying out dipping modification by using an alkaline solution in a contact manner, filtering and drying to obtain a modified base material; 2) granulating the modified base material to prepare particles, 3) calcining obtained particles at a high temperature of 600-1000 DEG C to obtain a porous particle material, and 4) dipping the porous particle material in oxygen, carrying out pressure swing adsorption-oxygen carrying treatment, and carrying out oxygen loading in pores or on the structure of the porous particle material.

Description

technical field [0001] The invention belongs to the field of environmental science and engineering technology, and specifically relates to a material with composite functions of oxygen carrying and pollutant adsorption prepared by using natural and cheap materials and its application in water environment restoration. Background technique [0002] Water environmental pollution is one of the environmental problems attracting global attention. Even if the input of exogenous pollutants is effectively controlled, the internal source pollution accumulated in the water environment will cause the water body to be polluted for a long time. The oxygen environment exacerbates the risk of release of endogenous pollutants accumulated in the sediment into the water. [0003] Sediment, also known as sediment, is an important destination and reservoir for pollutants entering rivers, lakes and other surface water bodies, and is also the internal source of overlying water pollution. Especial...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/16C02F1/28C02F1/68C02F3/02C02F11/00C02F11/02C02F101/16C02F101/10
CPCB01J20/12B01J20/20B01J20/16B01J20/165B01J20/103B01J20/08B01J20/06B01J20/0248B01J20/0288B01J20/041C02F1/283C02F1/281C02F3/02C02F11/00C02F11/02C02F2101/16C02F2101/105Y02W10/10
Inventor 张洪刚刘李璇潘纲陈俊
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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