Absorbent for heavy metal elements in sewage and preparation method thereof
A heavy metal and absorbent technology, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problem of poor removal of heavy metals, and achieve good removal effect, large adsorption capacity, and efficient removal. Effect
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Embodiment 1
[0020] An absorbent for heavy metal elements in sewage proposed by the present invention is made of the following raw materials in parts by weight: 20 parts of modified starch, 20 parts of pomegranate peel extract, 10 parts of chelated fiber, 8 parts of polyepoxysuccinic acid, carboxylic acid 5 parts of methyl chitosan, 5 parts of citric acid, 2 parts of disinfectant.
[0021] The present invention also proposes a preparation method for the heavy metal element absorbent in the above-mentioned sewage, comprising the following steps:
[0022] S1. Grinding and pulverizing the pomegranate peel extract to obtain pomegranate peel extract powder;
[0023] S2. Mix the pomegranate peel extract powder, modified starch, chelating fiber, polyepoxysuccinic acid, carboxymethyl chitosan, and citric acid, stir evenly, microwave heating, heat preservation, and cooling to obtain the mixture;
[0024] S3. Add disinfectant to the mixture and mix evenly, vacuum dry, cool, grind and pulverize.
Embodiment 2
[0026] An absorbent for heavy metal elements in sewage proposed by the present invention is made of the following raw materials in parts by weight: 50 parts of modified starch, 35 parts of pomegranate peel extract, 15 parts of chelating fiber, 17 parts of polyepoxysuccinic acid, carboxylic acid 15 parts of methyl chitosan, 10 parts of citric acid, 7 parts of disinfectant.
[0027] Wherein, the modification method of modified starch is as follows: dissolving sodium tripolyphosphate with distilled water to obtain sodium tripolyphosphate solution; 6-7. Precipitate after standing, wash with water, filter with suction, dry, and grind to obtain cross-linked starch; add water to the cross-linked starch and stir evenly, heat and gelatinize, cool down, feed nitrogen, add cerium ammonium nitrate and N , N-dimethylacetamide, stirring and reacting, then adding methyl acrylate, sealing the reaction, cooling to room temperature, adjusting the pH to 6-7, adding ethylenediamine, stirring and ...
Embodiment 3
[0033] An absorbent for heavy metal elements in sewage proposed by the present invention is made of the following raw materials in parts by weight: 35 parts of modified starch, 28 parts of pomegranate peel extract, 12 parts of chelated fiber, 13 parts of polyepoxysuccinic acid, carboxylic acid 10 parts of methyl chitosan, 8 parts of citric acid, 4 parts of disinfectant.
[0034] Among them, the modification method of modified starch is as follows: 0.6 parts of sodium tripolyphosphate are dissolved with distilled water to obtain sodium tripolyphosphate solution; 55 parts of 3% sodium carbonate solution are added to 26 parts of sweet potato starch and stirred evenly, and placed in ℃ in a constant temperature water bath, slowly add ammonium tripolyphosphate solution dropwise within 5 minutes, react for 3.5 hours, adjust the pH to 6-7, settle after standing, wash with water, filter with suction, dry and grind to obtain cross-linked starch; take 12 65 parts of cross-linked starch, ...
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Abstract
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