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Preparation method of acidification sludge bentonite granules

A technology of bentonite and sodium bentonite is applied in the environmental field to achieve the effects of reasonable design, low cost and excellent adsorption performance

Inactive Publication Date: 2009-02-11
SHANDONG UNIV
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Problems solved by technology

At present, the granulation of bentonite mainly focuses on the research of adding chemical binders to form powdery bentonite, but there is no research on using solid waste—sludge as a porogen to make use of the bonding properties of bentonite itself to form it. to report

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  • Preparation method of acidification sludge bentonite granules

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Embodiment

[0022] The preparation method of acidified sludge bentonite granules, the steps are as follows:

[0023] (1) In terms of parts by weight, mix the sludge and sodium bentonite at a ratio of 1:3, add water and stir until viscous, pass through a 20-mesh sieve, extrude and granulate, and dry to obtain a 2mm porous sludge bentonite particles;

[0024] (2) Place the particles prepared above in a muffle furnace, burn them at a high temperature of 700°C for 7 hours, and cool them naturally to room temperature to make porous sludge bentonite particles;

[0025] (3) The sludge bentonite particles and the sulfuric acid solution were subjected to a solid-to-liquid ratio of 1:25 (g:mL), and the reaction solution was shaken at room temperature for 4 hours to obtain a reaction solution of the porous sludge bentonite particles and the sulfuric acid solution;

[0026] (4) Filter the reaction solution, wash the acidified sludge bentonite particles with distilled water until the filtrate does no...

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Abstract

The invention relates to a preparation method of acidified sludge bentonite particles, pertaining to the technical field of environmental protection. Sludge and nano-bentonite powder are mixed together according to a certain ration, porous sludge bentonite particles are prepared by roasting under high temperature and the activity of the porous sludge bentonite particles is further modified by sulphuric acid to prepare the acidified sludge bentonite particles. The acidified sludge bentonite particles is yellow solid particles, with organic substance content reaching 165.788mg / g, specified surface area being 4.71m<2> / g, lost ratio being 0.56 percent and water absorptivity being 17.65 percent. The preparation method has the advantages of simple technology, economic efficiency, low cost, and the like, and the prepared acidified sludge bentonite particles have stable quality, uniform appearance and good absorptivity, thereby not only realizing the utilization of sludge as resource and the reduction of the pollution caused by the sludge, but also having wide application value in the aspect of decoloring processing of waste water produced in printing and dyeing, and realizing the purpose of treating waste by utilizing waste.

Description

technical field [0001] The invention relates to a preparation method of acidified sludge bentonite particles, belonging to the field of environmental technology. Background technique [0002] Bentonite is a clay mineral with montmorillonite as the main mineral component. It not only has good adsorption and ion exchange properties, but also has abundant resources and low price. Therefore, compared with other adsorbents with high cost and energy consumption such as activated carbon, bentonite has a wider application prospect in the field of environmental protection. However, powdered bentonite has good suspension dispersion and swelling properties, and forms mud when it meets water, with high turbidity and poor permeability. With the continuous improvement of environmental protection requirements and the automation of the production process, the granulation of powder products has become an inevitable trend in the world's powder post-processing technology. Therefore, powdery b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30B01J2/20
Inventor 岳钦艳原爱娟李倩高宝玉李静贾洪玉
Owner SHANDONG UNIV
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