Fertilizer for mercury polluted soil

A mercury pollution and soil technology, applied in the directions of organic fertilizers, inorganic fertilizers, ammonium salt fertilizers, etc., can solve the problems of reducing the absorption and utilization of fertilizers by crops, the accumulation effect and genotoxicity are obvious, and the content of heavy metals in the soil exceeds the standard, so as to achieve high yield and restoration. Soil heavy metal, nutrient-rich, nutrient-rich effect

Inactive Publication Date: 2017-05-31
BLESSING OF GUIZHOU ECOLOGICAL FERTILIZER CO LTD
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  • Application Information

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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

Method used

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  • Fertilizer for mercury polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A fertilizer for mercury-contaminated soil, consisting of the following raw materials in parts by weight: urea 25kg, potassium sulfate 15kg, urea phosphate 25kg, calcium nitrate 10kg, calcium chloride 10kg, gypsum 8kg, sodium selenite 6kg, sulfuric acid Zinc 4kg, ammonium molybdate 3kg, traditional Chinese medicine residue 10kg, plant extract 15kg, modified calcium hydroxide 15kg, modified bentonite 10kg.

[0022] The plant extract is mixed with ramie and willow root in a mass ratio of 1:0.65, crushed for 10 minutes, filtered, added water to the filter residue, decocted at 80°C for 1.5 hours, filtered, added water and repeatedly decocted for 40 minutes, filtered , combine the three filtrates, concentrate to 1 / 2 of the total filtrate volume, add ethanol with a concentration of 35%, reflux at 55°C for 25min, recover ethanol, add oxalic acid, adjust the pH value to 2, stir in a constant temperature water bath at 45°C for 1h, Add methanesulfonic acid, reflux at 80°C for 1 h...

Embodiment 2

[0031] A fertilizer for mercury-contaminated soil, consisting of the following raw materials in parts by weight: urea 30kg, potassium sulfate 20kg, urea phosphate 30kg, calcium nitrate 15kg, calcium chloride 15kg, gypsum 13kg, sodium selenite 9kg, sulfuric acid Zinc 7kg, ammonium molybdate 5kg, traditional Chinese medicine residue 15kg, plant extract 20kg, modified calcium hydroxide 20kg, modified bentonite 15kg.

[0032] The plant extract is mixed with ramie and willow root in a mass ratio of 1:0.75, crushed for 15 minutes, filtered, added to the filter residue, decocted at 85°C for 2 hours, filtered, then added water and repeatedly decocted for 45 minutes, filtered, Combine the three filtrates, concentrate to 1 / 2 of the total filtrate volume, add ethanol with a concentration of 40%, reflux at 60°C for 30min, recover ethanol, add oxalic acid, adjust the pH value to 3, stir in a constant temperature water bath at 50°C for 1.3h, Add methanesulfonic acid, reflux at 85°C for 1.5h...

Embodiment 3

[0041] A fertilizer for mercury-contaminated soil, consisting of the following raw materials in parts by weight: urea 28kg, potassium sulfate 18kg, urea phosphate 28kg, calcium nitrate 13kg, calcium chloride 13kg, gypsum 11kg, sodium selenite 8kg, sulfuric acid Zinc 5kg, ammonium molybdate 4kg, traditional Chinese medicine residue 13kg, plant extract 18kg, modified calcium hydroxide 18kg, modified bentonite 13kg.

[0042] The plant extract is mixed with ramie and willow root in a mass ratio of 1:0.7, crushed for 13 minutes, filtered, added water to the filter residue, decocted at 83°C for 1.8 hours, filtered, added water and repeatedly decocted for 43 minutes, filtered , combine the three filtrates, concentrate to 1 / 2 of the total filtrate volume, add ethanol with a concentration of 38%, reflux at 58°C for 28min, recover ethanol, add oxalic acid, adjust the pH value to 2-3, stir in a constant temperature water bath at 48°C 1.1h, add methanesulfonic acid, reflux at 83°C for 1.3...

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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...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B15/00C05G3/00C05G3/80C05C3/00C05C5/04C05C9/00C05D1/02C05D3/00C05D3/02C05D9/00C05D9/02C05F11/00
Inventor 李敬陈肖虎肖诗谋杨丹
Owner BLESSING OF GUIZHOU ECOLOGICAL FERTILIZER CO LTD
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