Reconstructed titanium-containing blast furnace slag with soil remediation and plant nutrient functions and application of reconstructed titanium-containing blast furnace slag

Abstract

The invention discloses reconstructed titanium-containing blast furnace slag with soil remediation and plant nutrient functions and application of the reconstructed titanium-containing blast furnace slag, which belong to the field of chemical fertilizers. Effective active components of the reconstructed titanium-containing blast furnace slag comprise a potassium aluminosilicate phase and a transition metal doped perovskite phase, the transition metal doped perovskite phase is wrapped in the potassium aluminosilicate phase, and the transition metal doped perovskite phase accounts for 24%-40% of the reconstructed titanium-containing blast furnace slag by mass. The balance is a potassium aluminosilicate phase and inevitable impurities; and the reconstructed titanium-containing blast furnace slag is applied to remediation of soil polluted by heavy metal organic matters. The reconstructed titanium-containing blast furnace slag prepared by the method disclosed by the invention can degrade soil polluted by organic pollutants and heavy metals under the action of sunlight, can also slowly release some inorganic nutrient substances such as Ca, Si, Mg, Al and K in the soil, promotes rapid growth of plants, is a material integrating soil remediation and plant nutrient functions, and has great significance in the aspects of continuous, environment-friendly and efficient remediation of the polluted soil.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizer preparation, and in particular relates to a reconstituted titanium-containing blast furnace slag with functions of soil restoration and plant nourishment and an application thereof. Background technique [0002] Soil pollution is caused by industry, agriculture, and human activities, which eventually make the content of heavy metals and toxic and harmful organic substances in the soil higher than normal, which reduces the quality of the existing soil and affects the ecological environment. Heavy metals and organic matter will remain latent in the soil for a long time, and their pollution to the soil is not easy to detect, and will continue to affect plants, animals, microorganisms in the soil, and even drinking water. Therefore, effective restoration technology is particularly important . The overall situation of China's soil environment is not optimistic. The national soil pollution ...

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Problems solved by technology

[0011] Aiming at the problem of single function of the existing products obtained by using titanium-containing blast furnace slag, the present invention increases the volume of the perovskite phase by reconstructing and modifying the titanium-containing blast furnace slag, and obtains a product that has the functions of soil restoration and plant nutrition at the same time. Reconstruct titanium-containing blast furnace slag to obtain optimized reconstructed titanium-containing blast furnace slag, which can not only degrade heavy metals and organic pollutants in soil through cheap "sunlight", but also slowly release Si, Ca, Mg, Al, K, etc. Nutrients that promote plant growth

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