Soil restoration agent containing loaded nano titanium dioxide

Abstract

The invention discloses a soil restoration agent containing loaded nano titanium dioxide. The soil restoration agent can be used for restoring soil polluted by heavy metal and organic pollutants. Thesoil restoration agent comprises loaded nano titanium dioxide and straw powder, and the loaded nano titanium dioxide is prepared by loading anatase nano titanium dioxide and tin doped modified anatasenano titanium dioxide onto fumed silica and coal ash. The soil restoration agent can effectively reduce heavy metal ions in soil to lower heavy metal content in planted crops, effectively degrade organic pollutants in the soil, remarkably improve pollution degree of polluted soil and improve cultivation performance of the soil. Inorganic fertilizer and / or organic fertilizer can be added selectively into the soil restoration agent to increase nutritional fertility of the soil and promote crop growth, and effects of improving crop yield and quality are realized.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a soil remediation agent containing loaded nano-titanium dioxide, which can be used to remediate soil polluted by heavy metals and organic pollutants. Background technique [0002] With the intensification of human activities, the soil on which humans depend is gradually being destroyed, and soil pollution is becoming more and more serious, which leads to a sharp decline in the yield and quality of crops, and ultimately endangers human health and human survival and development. . At present, in domestic soil pollution, heavy metal (mainly including Hg, Pb, As, Cd, Cr, etc.) pollution and organic pollutants (mainly including pesticide residues, fertilizer residues, phenols, petroleum pollutants, etc.) are more common. The problem of remediation of similar soils needs to be solved urgently. [0003] In the prior art, methods of physical remediation, chemical ...

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Problems solved by technology

[0006] Many studies on existing photocatalytic degradation technologies have shown that TiO 2 It has a certain degradation effect on organic pollutants, and also has a certain reduction and adsorption effect on heavy metals in the soil, but using a single TiO 2 , less efficient

Nanoscale TiO 2 Raised TiO 2 The specific surface area makes the activity of catalytic reduction of heavy metal ions and the activity of degradation of organic pollutants both improved to a certain extent, but due to the small particles, they are easy to be lost and the utilization rate is low, resulting in the final catalytic effect is still poor

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