Soil remediation agent for urban afforestation and greening

Abstract

The invention discloses a soil remediation agent for urban afforestation and greening. The soil remediation agent is made from the following raw materials, by weight part, 23-25 of activated sludge, 3-4 of ganoderma spore powder, 5-7 of diammonium phosphate, 2.5-2.6 of alginic acid, 16-17 of sauce residue, 2.5-2.6 of calcium acetate, 57-60 of polluted pig dung and urine, 13-14 of a black liquor from papermaking, 3.2-3.3 of a nitric acid solution with the concentration being 10%, 8-10 of a thick alum liquid and a proper amount of water. The soil remediation agent aims at soil for urban afforestation and greening, which lacks nutrients and is relatively severely polluted. The soil remediation agent has the effects of adsorption and passivation so as to prevent the harm of surface soil dust and a large number of heavy metal emissions, the combined effect of organic humus and inorganic readily-available nutrients improves the soil fertility, and activity of biological fungi cooperates, so that the soil remediation agent is beneficial for growth of green plants, and fertility increase and pollution reduction of soil of a greenbelt are achieved.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to an urban greening soil restoration agent. Background technique [0002] Soil improvement is aimed at the poor texture and structure of the soil, and corresponding measures are taken to improve soil properties and soil fertility. Soil improvement and restoration agent is an important application of soil improvement. However, the soil remediation and improvement agents currently on the market have many defects: one is that the raw materials used contain artificially synthesized polymer compounds, which are not easy to decompose in the soil and remain for a long time, which has potential safety hazards; Soils, such as acidic and alkaline soils, have no effective targets for heavy metal pollution and nutrient deficiencies, resulting in low efficiency of improvement and restoration, or even counterproductive effects; third, the long cycle and high cost of soil improvement pre...

AI Technical Summary

Problems solved by technology

However, the soil remediation and improvement agents currently on the market have many defects: one is that the raw materials used contain artificially synthesized polymer compounds, which are not easy to decompose in the soil and remain for a long time, which has potential safety hazards; Soils, such as acidic and alkaline soils, have no effective targets for heavy metal pollution and lack of nutrients, resulting in low efficiency of improvement and restoration, or even counterproductive effects; third, the cycle of soil improvement is long and the cost is high, so it cannot be applied on a large scale

[0003] The soil in the urban green belt is not specially managed, and the soil quality is poor. At the same time, it is polluted by a large amount of dust and exhaust gas.

[0004] As a renewable biological resource with a wide range of sources and low cost, pig manure has great potential as a raw material for soil improvement and restoration because it is rich in organic matter and nutrients such as nitrogen, phosphorus, and potassium. The feed contains a large amount of additives during the process, resulting in excessive heavy metals and indirectly polluting the excrement