Preparation method and use of multifunctional soil improving agent
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A soil conditioner and multi-functional technology, applied in the field of waste biomass treatment and disposal, which can solve the problems of insufficient value-added and technical development, late discovery of attapulgite, and insufficient research on ore deposit components.
Inactive Publication Date: 2018-11-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology
Due to the late discovery of attapulgite in our country, the research on the known ore deposit composition is not enough, the degree of development and utilization is low, and the raw ore is mainly used, and the added value and technical development of the product are not enough.
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Embodiment 1
[0023] The prepared multifunctional soil conditioner is used as a remediation agent for remediation of contaminated soil
[0024] 1. Material preparation
[0025] Waste biomass was corn stalks, which were dried and crushed for later use; PAHs-contaminated soil (Σ2-ring PAHs 5261 μg / kg; Σ3-ring PAHs 9220 μg / kg; Σ4-ring PAHs 17301 μg / kg; Σ5-ring PAHs 592 μg / kg 5; Σ6 -ring PAHs 2966μg / kg) and Cd (7.6mg / kg) contaminated soil were taken from actual polluted soil respectively (PAHs contaminated soil was taken from a coking plant; Cd contaminated soil was taken from a chemical smelter). After the soil samples were dried in a fume hood for 24 hours, the leaves, plant roots, and stones were removed, crushed, passed through a 2mm sieve, and stored in the dark.
[0026] 2. Preparation of modifier
[0027] 1) Fully mix corn stalks (dry basis), attapulgite and water at a ratio of 4:1:20;
[0028] 2) After the mixture is transferred to the hydrothermal reaction kettle, seal it;
[0029]...
Embodiment 2
[0070] The prepared multifunctional soil conditioner is used as an organic fertilizer.
[0071] 1. Preparation of modifier
[0072] Pig manure was used as waste biomass, which was dried and crushed to less than 5mm for later use.
[0073] 1) Mix pig manure (dry basis), water, and attapulgite at a ratio of 1:5:5 and put them into a hydrothermal reaction kettle.
[0074] 2) Heat the reactor to 220°C and keep it for 60 minutes; conduct solid-liquid separation after cooling by an electric fan and internal circulating cooling water;
[0075] 3) The multifunctional soil conditioner (moisture content 48%, dry basis organic matter 64.2%, TN 1.26%, P 2 o 5 2.12%, K 2 O 1.94%).
[0076] 2. Fertilizer effect experiment design
[0077] Experiments were carried out using the plot test method. Each plot is about 10m 2 , the experiment set up 2 treatments, applying commercial organic fertilizer (Yifeng Organic Fertilizer (Potassium Fulvic Acid Type) N+P 2 o 5 +K 2 O ≥ 5%, organic ...
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Abstract
The high-strength utilization mode of the land in China accelerates the deterioration of a soil function, and soil pollution is very serious due to excessive application of chemical fertilizer and agricultural products. The crop yield declining and food safety incidents caused by soil degradation and soil pollution take place frequently and cause serious threats to people's health. The developmentof an eco-friendly, cheap and high-efficiency soil conditioner for improving soil fertility and reducing soil pollution is extremely urgent. The invention discloses a preparation method of a multifunctional soil improving agent. The preparation method comprises mixing waste biomass and a certain amount of attapulgite and modifying the mixture under specific conditions to obtain the multifunctional soil improving agent. The preparation method has simple processes. The multifunctional soil improving agent is renewable and eco-friendly, realizes a low cost, is rich in nutrients such as trace elements necessary for crop growth and can be used as organic fertilizer and a contaminated soil repairing agent.
Description
technical field [0001] The invention relates to the treatment and disposal of waste biomass, which belongs to the new technology of resource utilization of solid waste in the field of environmental protection and comprehensive utilization of resources, and is especially suitable for the resource utilization of high value-added waste biomass such as straws and manure of livestock and poultry in large quantities. Background technique [0002] The "National Soil Pollution Survey Bulletin" shows that my country's soil degradation and pollution are very serious. Irrational irrigation and human and natural factors lead to low soil fertility, nutrient deficiency, serious degradation, increased soil pollution, and the area of polluted soil continues to rise. At the same time, high-intensity intensive utilization has led to the continuous formation of secondary obstacles such as shallowing of the plow layer, soil compaction, biological degradation, and continuous cropping obstacles...
Claims
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Application Information
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