Preparation method and application of porous ceramic ball soil remediation agent capable of eliminating heavy metal pollution in dry land

Abstract

The invention provides a preparation method and application of a porous ceramic ball soil remediation agent capable of eliminating heavy metal pollution in dry land. The preparation method comprises the following steps: preparing a biomass material, bone meal, rust powder, a fluxing agent and fine red clay powder; uniformly mixing 100 parts by mass of the fine red clay powder, 15-30 parts by mass of wood chip powder, 20-35 parts by mass of the bone meal, 8-10 parts by mass of the rust powder, 10-20 parts by mass of the fluxing agent and 90-150 parts by mass of clear water, preparing an embryo, and drying the embryo in the shade till the water content of the embryo reaches 12-16%; and then performing continuous sintering in an electrical furnace at 800-1200 DEG C for 60 min, so as to obtain the porous ceramic ball soil remediation agent. According to the application, 750-2000 kg of the above porous ceramic ball soil remediation agent is uniformly applied to the dry land per mu; through a plow harrow and other conventional cultivation measures, the porous ceramic ball soil remediation agent can be uniformly distributed in a cultivation layer; and 3-5 years later, the residual body of the porous ceramic ball soil remediation agent can be removed by adopting electromagnetic adsorption. The preparation method provided by the invention turns waste into treasure, turns harm into good, and is practicable.

Description

technical field [0001] The invention belongs to the technical fields of soil science and agricultural chemistry. The invention relates to a preparation method and application of a porous ceramic ball soil restoration agent for removing heavy metal pollution in dry land. Background technique [0002] In the past 50 years, about 22,000 tons of Cr, 22,000 tons of Cd, 940,000 tons of Cu, 780,000 tons of Pb and 1.35 million tons of Zn were discharged into the global environment, most of which entered the soil, causing Soil heavy metal pollution. In the past 100 years, about 200,000 tons of Hg were released into the atmosphere, and there are still about 3,500 tons of Hg remaining in the atmosphere. At present, 1,900 to 2,200 tons of Hg are emitted into the atmosphere by human-made pollution sources around the world, of which coal burning and waste incineration emit Mercury accounts for 70%. Other sources of emission are gold smelting, non-ferrous metal smelting, cement producti...

AI Technical Summary

Problems solved by technology

The bioremediation method is time-consuming and costly, and it is difficult to deal with toxic biological residues

Physical treatment requires special instruments and trained professionals, and more importantly, it cannot fundamentally solve the problem

Simple chemical treatment is likely to cause secondary pollution