Contaminated soil top layer remediation material and preparation method thereof
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A technology for repairing materials and polluted soil, applied in the field of environmental restoration, which can solve problems such as long cycle times, achieve low cost, low repair cost, and good results
Active Publication Date: 2016-03-02
扬州红硕环境与生物工程研究有限公司
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The biological method is favored by people because of its good effect, economical, green, clean and no secondary pollution, but the cycle required for bioremediation is longer
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[0025] The preparation method of the above-mentioned polluted soil top layer restoration material comprises the following steps:
[0026] (1) Mix the fly ash with different particle sizes, then add the formula amount of buffer and mix thoroughly, then add the formula amount of vermiculite and mix thoroughly;
[0027] (2) Mix the mixture obtained in step (1) with the sludge of the formula amount, add water during the mixing process, and squeeze it vigorously to make it fully mixed during the mixing process;
[0028] (3) Add water to the mixture obtained in step (2), keep the water content between 50-80%, keep the temperature between 15-40°C, and carry out fermentation treatment, and the fermentation time is 30-60 days;
[0029] (4) Grind and sieve the mixture obtained after fermentation to form a material with a particle size similar to that of loam, and finally form a contaminated soil top layer repair material with similar physical and chemical properties to mature soil.
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Embodiment 1
[0032] 1 Materials and methods
[0033] 1.1 Experimental design
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Abstract
A kind of contaminated soil top repair material, including fly ash, activated sludge, buffer, vermiculite, wherein fly ash, activated sludge, buffer, vermiculite account for fly ash, activated sludge, buffer, vermiculite The percentages by weight of the total stone weight are 35-65%, 30-60%, 0.5-10%, 4-5%, respectively. The preparation method of the above-mentioned restoration material: (1) Mix fly ash with different particle sizes, then add a formulated amount of buffer and mix thoroughly, then add formulated amount of vermiculite and mix thoroughly; (2) combine the steps ( 1) Mix the mixture obtained in the formula with the amount of sludge, add water during the mixing process, and squeeze it hard during the mixing process to make it fully mixed; (3) Add the mixture obtained in step (2) Water, keep the moisture content between 50-80%, keep the temperature between 15-40°C, and carry out fermentation treatment, the fermentation time is 30-60 days; (4) Grind and sieve the mixture obtained after fermentation to form A material with a particle size similar to that of loam. The product prepared by the invention has low cost, good effect and simple process, and is suitable for remediation and improvement of large-area polluted soil.
Description
technical field [0001] The invention relates to a preparation raw material and preparation method of a polluted soil top restoration material, belonging to the field of environmental restoration. Background technique [0002] Top-level restoration materials for polluted soil refer to laying 5-10cm restoration materials on the top layer of contaminated soil, planting specific plants in the restoration materials, and removing heavy metals and organic matter from the contaminated soil through the adsorption of chemical elements, microorganisms and plants in the restoration materials. passivation and removal of harmful substances, so as to achieve the purpose of remediating polluted soil. The remediation materials on the top layer of polluted soil are not only rich in water, fertilizer, gas and other factors to ensure the growth of plants, but also contain the effect of passivating the bioavailability of heavy metals in polluted soil. In the process of remediation, the enrichmen...
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