Preparation method of fly ash-sodium alginate composite adsorption material

A composite adsorption material and sodium alginate technology are applied in the preparation field of functionalized fly ash-sodium alginate composite adsorption material, which can solve problems such as insufficient adsorption performance of fly ash, achieve resource utilization and improve adsorption performance , the effect of reducing processing costs

Inactive Publication Date: 2018-12-04
SHENZHEN HONGKONG INSTITUTION OF IND EDUCATION & RES ENVIRONMENTAL ENG TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that traditional fly ash has insufficient adsorption performance, and its application in wastewater treatment, especially wastewater treatment containing heavy metal ions, is limited. Preparation method of functionalized fly ash-sodium alginate composite particle adsorption material with good adsorption performance for heavy metal ions

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  • Preparation method of fly ash-sodium alginate composite adsorption material
  • Preparation method of fly ash-sodium alginate composite adsorption material
  • Preparation method of fly ash-sodium alginate composite adsorption material

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Embodiment 1

[0032] The present embodiment provides a preparation method of fly ash-sodium alginate composite adsorption material, which comprises the following steps:

[0033] S1, get fly ash from thermal power plant, after removing impurity and drying, cross 200 mesh sieves, adopt the hydrochloric acid of 1mol / L as activator, carry out activation treatment to fly ash: fly fly ash and hydrochloric acid solution according to 1: The volume ratio of 2 was stirred and activated at 20° C. at a stirring speed of 50 r / min for 6 hours to obtain activated fly ash.

[0034] S2. Wash the activated fly ash obtained after the activation treatment with deionized water to neutrality, then settle naturally in deionized water, separate the upper layer of suspended fly ash after the sedimentation, take the lower layer of settled fly ash, filter and dry, and obtain Heavy activated fly ash, the density of the heavy activated fly ash is 1.9cm 3 / g, the specific surface area of ​​fly ash before activation is ...

Embodiment 2

[0043] The present embodiment provides a kind of preparation method of functionalized fly ash, it comprises the following steps:

[0044] S1, get fly ash from thermal power plant, after removing impurity and drying, cross 200 mesh sieves, adopt the sulfuric acid of 5mol / L as activator, carry out activation treatment to fly ash: fly fly ash and sulfuric acid solution according to 1: The volume ratio of 10 was stirred and activated at 100° C. at a stirring speed of 100 r / min for 1 hour to obtain activated fly ash.

[0045] S2. Wash the activated fly ash obtained after the activation treatment with deionized water to neutrality, then settle naturally in deionized water, separate the upper layer of suspended fly ash after the sedimentation, take the lower layer of settled fly ash, filter and dry, and obtain Heavy activated fly ash, the density of the heavy activated fly ash is 2.3cm 3 / g, the specific surface area of ​​fly ash before activation is about 3.0~5.2m 2 / g, the specif...

Embodiment 3

[0054] The present embodiment provides a kind of preparation method of functionalized fly ash, it comprises the following steps:

[0055] S1, get fly ash from thermal power plant, after removing impurity and drying, cross 200 mesh sieves, adopt the sulfuric acid of 3mol / L, hydrochloric acid mixed solution as activator (the volume ratio of described sulfuric acid, hydrochloric acid is 1:1), Activate the fly ash: stir and activate the fly ash, sulfuric acid and hydrochloric acid mixed liquid solution at a volume ratio of 1:5 at 70°C for 3 hours at a stirring speed of 80r / min to obtain activated fly ash.

[0056] S2. Wash the activated fly ash obtained after the activation treatment with deionized water to neutrality, then settle naturally in deionized water, separate the upper layer of suspended fly ash after the sedimentation, take the lower layer of settled fly ash, filter and dry, and obtain Heavy activated fly ash, the density of the heavy activated fly ash is 2.1cm 3 / g, t...

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Abstract

The invention discloses a preparation method of a fly ash-sodium alginate composite adsorption material. Fly ash is taken as the raw material and is activated and separated. Because fly ash has a goodpore structure, during the process of water bloom reactions, abundant hydroxyl groups appear on the surface of fly ash particles, thus fly ash will have a prominent hydrophilic performance, adsorbingperformance, and surface chemical activity; then the fly ash is modified by functional groups to prepare functional fly ash; then functionalized fly ash and sodium alginate are used to prepare the granular composite adsorption material; the synergetic effect between the functional fly ash and abundant functional groups (COO- groups) on the surface of sodium alginate is fully exerted; the adsorption material can be used to adsorb heavy metal ions with positive charges, such as Cu<2+>, Ni<2+>, Zn<2+>, Pb<2+>, Cd<2+>, and the like; the production cost is low, the fly ash is converted into valuable resources; the specific surface area of activated fly ash is increased by 15 to 20 times, the adsorbing performance is greatly enhanced, the prepared composite material can be desorbed and repeatedly used and can avoid secondary pollution, and the processing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a preparation method of an adsorption material, in particular to a preparation method of a functionalized fly ash-sodium alginate composite adsorption material. Background technique [0002] With the development of industrialization and urbanization, the pollution of water environment and the shortage of water resources have become increasingly serious. Water pollution control and water environment protection have become urgent. An important reason for water pollution is that various industrial wastewater and domestic sewage cannot be effectively treated and discharged up to standards. , especially the heavy metal ions contained in industrial wastewater have great harm to the environmental ecosystem. In recent years, a large amount of heavy metal ions have been discharged into water bodies, which cannot be biodegraded in the natural environment, but will acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/06B01J20/08B01J20/103B01J20/24C02F1/288C02F2101/20
Inventor 梅立永汪乐燕王波庄毅璇王磊薛燕吴世闽
Owner SHENZHEN HONGKONG INSTITUTION OF IND EDUCATION & RES ENVIRONMENTAL ENG TECH CO LTD
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