Fertilizer for mercury polluted soil

Abstract

The invention relates to the technical field of fertilizers, in particular to a fertilizer for mercury polluted soil. The fertilizer comprises, by weight, 25-30 parts of urea, 15-20 parts of potassium sulfate, 25-30 parts of urea phosphate, 10-15 parts of calcium nitrate, 10-15 parts of calcium chloride, 8-13 parts of gypsum, 6-9 parts of sodium selenite, 4-7 parts of zinc sulfate, 3-5 parts of ammonium molybdate, 10-15 parts of Chinese medicine residues, 15-20 parts of plant extract, 15-20 parts of modified calcium hydroxide and 10-15 parts of modified bentonite. The fertilizer is rich in nutrients, the total nutrient content of nitrogen, phosphorus and potassium is larger than or equal to 58.9%, the rate of changing an effective state into an ineffective state serves as a soil restoration evaluation index, the conversion rate of mercury metal in the soil reaches 96.1% or more, take Chinese cabbages as an example, yield can be increased by 12.6-12.9%, and double benefits of high yield and soil heavy mental restoration are achieved.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a fertilizer used for mercury-polluted soil. Background technique [0002] In recent years, with the rapid development of modern industry and agriculture, the population has grown rapidly, and the demand for food has also increased accordingly. More and more types of pesticides have been widely used. In addition, the development of industrial and mining enterprises has led to the over-exploitation of mineral resources, which has made heavy metal soil pollution more and more serious. In some places, the content of heavy metals in food, vegetables, fruits and other foods exceeds the standard or is close to the critical value. Heavy metals in these agricultural products can be enriched in humans or animals through the food chain, becoming a potential threat to human life and health. On April 18, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resourc...

AI Technical Summary

Problems solved by technology

Among them, mercury has strong neurotoxicity and teratogenic effects, and its accumulation effect and genotoxicity are obvious. It has been listed as one of the priority pollutants by EPA (US Environmental Protection Agency). Once the soil is contaminated by mercury, it can pass through the food chain in the human body. Therefore, finding a suitable mercury-contaminated soil remediation technology has become a current research hotspot.

[0003] Since crops began to use chemical fertilizers, which are rich in N, P, K and other nutrient elements, they have a significant effect on increasing crop production. However, due to the discharge of pollution sources and the deterioration of the environment, the content of heavy metals in the soil exceeds the standard, and the pollution of the soil is becoming more and more serious. It greatly reduces the absorption and utilization of fertilizers by crops, and reduces the utilization rate of fertilizers. At the same time, crops grown under heavy metal pollution have great food safety. Therefore, in the current era of efficient and rapid development, it is necessary to develop a nutritional Rich in fertilizers that not only contain the nutrients necessary for crop growth, but also can effectively repair heavy metals in the soil. It is the current trend of agricultural development. It can not only grow healthy and safe crops, but also protect the soil. Excellent modification, reducing pollution, realizing the double benefits of high yield and heavy metal removal, has become the focus of research in the current planting industry and fertilizer industry. For this reason, the inventors have provided a multi-purpose compound with high yield and reduced mercury content for mercury-contaminated soils. Functional fertilizers have extremely high economic and social significance, and provide an effective way for the repair of soil pollution and the treatment of heavy metals

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