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Iron-manganese-modified algae adsorbent and preparation method thereof

The technology of adsorbent and algae is applied in the field of iron-manganese modified algae adsorbent and its preparation, which can solve the problems of large resource consumption and low adsorption capacity of algae, and achieve the effects of low price, no secondary pollution and wide source.

Active Publication Date: 2019-05-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorption capacity of algae is low compared to other adsorbents, and the separation of algae from algal bloom water is also resource-intensive.

Method used

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  • Iron-manganese-modified algae adsorbent and preparation method thereof
  • Iron-manganese-modified algae adsorbent and preparation method thereof
  • Iron-manganese-modified algae adsorbent and preparation method thereof

Examples

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preparation example Construction

[0026] The embodiment of the present invention proposes a preparation method of an iron-manganese modified algae adsorbent, comprising the following steps:

[0027] a) Add permanganate to the algae outbreak water body, mix to obtain solution 1;

[0028] b) adding ferrous salt to solution 1 obtained in step a), mixing, and standing to obtain solution 2;

[0029] c) centrifuging the solution two obtained in step b), removing the supernatant, and drying the obtained precipitate;

[0030] d) washing the dried precipitate in step c) with alkali, centrifuging, washing with ultrapure water to neutrality, then drying and grinding the treated precipitate to obtain the iron-manganese modified algae adsorbent.

[0031] Algae is an excellent adsorbent, because its cell wall contains a large number of carboxyl groups, hydroxyl groups and amino groups, and heavy metals can be removed through surface complexation. However, the adsorption capacity of algae is low compared with other adsorbe...

Embodiment 1

[0049] Example 1 : Preparation of Fe-Mn Modified Algae Adsorbent

[0050] a) Eutrophication pollution occurs in the water source of a water plant, and algae blooms, and the concentration of algae cells in the sample reaches 10 9 Each / L of the algae outbreak water body, add potassium permanganate to the algae outbreak water body until its concentration in the system is 12 μmol L -1 , stirred at 220rpm for 2min to obtain solution 1;

[0051] b) Add FeSO to solution one obtained in step a) 4 ·7H 2 O until its concentration in the system is 36 μmol L -1 , stirred at 40rpm for 60min, and left to age for 4h to obtain solution 2;

[0052] c) The solution 2 obtained in step b) was centrifuged at 4500rpm for 10min, and after removing the supernatant, the precipitate was freeze-dried for 48h;

[0053] d) Add a sufficient concentration of 0.1mol L to the dried precipitate in step c). -1 The NaOH solution was stirred for 6 hours by a rotating agitator, and then centrifuged after a...

Embodiment 2

[0054] Example 2 : Preparation of Fe-Mn Modified Algae Adsorbent

[0055] a) Eutrophication pollution occurred in the water source of a water plant, algae broke out, and the concentration of algae-containing cells reached 10 8 Each / L of the algae outbreak water body, add sodium permanganate to the algae outbreak water body until its concentration in the system is 10 μmol L -1 , stirred at 200rpm for 2min to obtain solution 1;

[0056] b) Add ferrous nitrate to solution one obtained in step a) until its concentration in the system is 30 μmol L -1 , stirred at 40rpm for 50min, and left to age for 4h to obtain solution 2;

[0057] c) The solution 2 obtained in step b) was centrifuged at 4000rpm for 8min, and after removing the supernatant, the precipitate was freeze-dried for 45h;

[0058] d) Add a sufficient concentration of 0.08mol L to the dried precipitate in step c). -1 The NaOH solution was stirred for 6 hours by a rotating agitator, and then centrifuged after alkalin...

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Abstract

The invention provides an iron-manganese-modified algae adsorbent and a preparation method thereof and belongs to the technical field of water treatment. The preparation method comprises the followingsteps of a, adding permanganate into water which is bursting with algae and mixing the two components to obtain a first solution; b, adding a ferrous salt into the first solution obtained in step a,mixing the mixture, and performing standing to obtain a second solution; c, centrifuging the second solution obtained in step b, removing a supernatant, and drying an obtained precipitate; d, washingthe dried precipitate in step c with alkali, centrifuging the precipitate, washing the precipitate with ultrapure water until the precipitate is neutral, and drying and grinding the treated precipitate to obtain the iron-manganese-modified algae adsorbent. The iron-manganese-modified algae adsorbent prepared by the method is mainly used for removing heavy metal ions in sewage, the preparation process of the method is simple, the sources of raw materials are wide, a process of separating the algae from the water is omitted, resource utilization of the algae in the water which is bursting with the algae is achieved, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an iron-manganese modified algae adsorbent and a preparation method thereof. Background technique [0002] At present, heavy metal pollution in my country's water environment is very serious, especially lead, cadmium, nickel, antimony and other elements, which are highly toxic and difficult to deal with. In the existing research, the methods used to remove heavy metals mainly include coagulation method, adsorption method, membrane separation and so on. Among them, the adsorption method mainly uses the unique structure of the adsorbent to remove heavy metals in the water body, which has the characteristics of large treatment capacity and low cost. Biomass adsorption materials, as one of the adsorbents, have attracted widespread attention from researchers due to their cheap, easy to obtain, and renewable properties. [0003] Biomass adsorbent Algae, because it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
Inventor 戚菁赵济金吉庆华刘会娟曲久辉
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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