Soil restoration fertilizer with passivated heavy metal mobility
A soil remediation and migration technology, applied to fertilizers made from biological waste, organic fertilizers, fertilizer mixtures, etc., can solve problems such as slow growth of hyperaccumulators, limited tolerance of heavy metal pollutants, and decline in soil fertility, so as to avoid The effects of polluting groundwater sources, reducing heavy metal leaching, and increasing buffer capacity
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[0020] A soil remediation fertilizer with passivation of heavy metal migration, which is made of the following parts by weight (kg) of raw materials: paulownia sawdust 20, traditional Chinese medicine residue 34, gelatin 4, kaolin 16, sodium polyphosphate 1, polyaluminum chloride 1, Zinc chloride 1, eucalyptus sawdust 48, siderite slag 12, limonite slag 12, orange peel 45, EM compound microbial inoculant 3, appropriate amount of water.
[0021] The specific steps for preparing the soil remediation fertilizer are as follows:
[0022] (1) Dry the orange peel and eucalyptus sawdust and mix it with siderite slag, put it in a closed calciner, heat it up to 400°C at a rate of 15°C / min in a nitrogen atmosphere, add limonite after keeping it for 20 minutes The slag is kept at the temperature for 30 minutes, and then the temperature is reduced to 230°C. Oxygen is continuously introduced into the airtight calciner. After 40 minutes, the calcined product is taken out, shaken for 10 minutes, a...
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