Organic repairing fertilizer for heavy metal contaminated soil

Abstract

The invention relates to the technical field of the fertilizer and in particular to an organic repairing fertilizer for heavy metal contaminated soil. The organic repairing fertilizer for the heavy metal contaminated soil is formed by the following raw materials by weight: 18-34 parts of urea, 15-20 parts of sodium nitrate, 20-40 parts of monopotassium phosphate, 18-22 parts of calcium superphosphate, 25-30 parts of sodium carbonate, 15-20 parts of potassium carbonate, 8-12 parts of ferric sulfate, 15-20 parts of biogas residue, 12-18 parts of cottonseed hulls, 7-13 parts of chicken manure, 14-18 parts of peanut hulls, 8-12 parts of shaddock peel, 10-15 parts of orange peel, 20-30 parts of modified cyclodextrin, 20-30 parts of modified sodium sulphide, 18-24 parts of modified bagasse, and the suitable amount of water. The fertilizer has abundant nutrition, and the total nutrient of nitrogen, phosphorus and potassium is greater than or equal to 57.8%. The removal rate of polychlorinated biphenyl in the soil by the fertilizer is more than 91.5%, and the removal rate of 3,3-dichloro-benzidine in the soil by the fertilizer is more than 94.8%, and the change rate from the effective-state heavy metal to the noneffective-state heavy metal is used as the evaluation index of the soil heavy metal repair. The chromium change rate in the soil by the fertilizer is more than 91.3%, and the lead change rate in the soil by the fertilizer is more than 92%.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a fertilizer for repairing soil polluted by organic matter and heavy metals. Background technique [0002] With the rapid development of the economy and the advancement of industrial technology, the rapid development of modern industry and agriculture, the extensive application of chemical fertilizers and pesticides, the exploitation of mines and oil fields, and the discharge of petrochemical, pesticide and pharmaceutical production enterprises have led to the continuous deterioration of soil pollution. Among them, the pollution of soil organic matter and heavy metals has become a prominent environmental problem that cannot be ignored. Most of the soil organic pollutants are volatile and semi-volatile compound pollutants. The absorption and enrichment of metals pose a risk of serious damage to the human body. These pollutants are continuously migrated and transformed in the s...

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Problems solved by technology

Among them, the pollution of soil organic matter and heavy metals has become a prominent environmental problem that cannot be ignored. Most of the soil organic pollutants are volatile and semi-volatile compound pollutants. The absorption and enrichment of metals pose a risk of serious damage to the human body. These pollutants are continuously migrated and transformed in the soil. They can enter the food chain through agricultural production and enter the human body through breathing. At the same time, they will also affect surface water and Groundwater causes pollution, endangering human health, and the current soil pollution source is no longer the traditional single pollution source. When multiple pollution sources pollute the soil at the same time, it is difficult to ensure the availability of soil and crops by using traditional restoration methods. Food safety, therefore, it is necessary to conduct research on the multi-pollution sources of soil and the status quo of variable pollution, so that soil pollution can be comprehensively treated. For agricultural planting, improving soil through fertilization has become one of the important means of controlling soil pollution. In the process of planting, it is one of the main measures taken to control soil pollution. Therefore, in the pursuit of pollution-free, safe and hygienic green food, and advocating a green and environmentally friendly development model, research and development of a low-cost and controllable restoration , A new type of farmland fertilizer that is in line with environmentally friendly development, can effectively alleviate soil pollution, and does not produce new pollution. It can not only increase crop production, but also effectively repair soil pollution and ensure the food safety of crops. It is important for China's agricultural development and fertilizers The field has important significance and urgency, and it is also of great significance to agricultural planting and environmental protection

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