Preparation method of organic-inorganic composite attapulgite mycotoxin adsorbent

Abstract

The invention discloses a preparation method of an organic-inorganic composite attapulgite mycotoxin adsorbent. The preparation method comprises: modifying acid activated attapulgite by using quaternized chitosan oligosaccharide, carrying out a reaction on the obtained material and acid activated active carbon, carrying out centrifugation, washing, drying, and crushing to obtain the organic-inorganic composite attapulgite mould toxin adsorbent. According to the present invention, the obtained product can effectively adsorb and remove all kinds of mycotoxins in the feed, has antibacterial function, and can reduce the antibiotic consumption in the feed.

Description

technical field [0001] The invention relates to a preparation method of an organic-inorganic composite attapulgite mycotoxin adsorbent, which belongs to the field of deep processing of non-metallic ores. Background technique [0002] Mycotoxins are anti-nutritional factors present in feed and raw materials, and are highly toxic secondary metabolites of molds. It can cause: acute and chronic poisoning of animals; reduce animal feed intake; reduce animal production performance, feed conversion rate and reproductive performance; inhibit animal immune function; potential safety hazards. Therefore, finding a suitable and effective method to control it is an urgent task for the development of animal husbandry. [0003] Common mycotoxins in feed mainly include: aflatoxin, zearalenone, deoxynivalenol, T-2 toxin, ochratoxin, fumagillin. In the test report released in 2016, the pollution rate of aflatoxin, zearalenone and vomitoxin has been relatively high for several years, especi...

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Problems solved by technology

First, the organic modifiers of montmorillonite are traditional surfactants such as dodecylaminopropionate, cetylammonium chloride, stearylammonium chloride and butyl dodecylaminocaproate. If the surfactant-containing wastewater is discharged directly during the preparation process, it is not conducive to environmental protection; secondly, the amount of internal carbon source is 50-90% of the mass of montmorillonite. Due to the large specific surface area of ​​activated carbon, there is a lack of specialization in the adsorption process. One-sided adsorption, if the dosage is too large, it will absorb too much nutritional components in the feed, resulting in the loss of nutritional components; in addition, when preparing carbon-coated montmorillonite, it is necessary to disperse high-purity montmorillonite at a concentration of 5-20 % hydrochloric acid or sulfuric acid solution for 1-2d, washed and dehydrated to obtain acidified montmorillonite thick slurry; carbon source materials were soaked in 30-60% concentration hydrochloric acid or sulfuric acid for 1-2d, dehydrated and washed to obtain acidified thick slurry; Pour the acidified thick slurry into the acidified montmorillonite thick slurry in proportion, stir for 2-5 hours, then calcinate at 500-700°C for 2-5 hours, and grind to obtain carbon-coated montmorillonite; the preparation process is too long, high energy consumption

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