An environmental friendly soil ecology modifying agent and a preparing method thereof

Abstract

An environmental friendly soil ecology modifying agent is disclosed. The modifying agent comprises 5-10% by mass of calcium bentonite, 50-60% by mass of acid-treated steel slag pulverized powder, 10-20% by mass of building waste pulverized powder, 20-30% by mass of ground mineral slag powder, 0.5-3% by mass of triethanolamine and 0.5-1.5% of FDN. The calcium bentonite is adopted as a component preserving water and nutrients, and the acid-treated steel slag pulverized powder and the building waste pulverized powder are used as main cementing materials. The prepared modifying agent is used for ecological remediation of polluted bottom mud of lakes and the like, has characteristics of good soil modifying effects, a low production cost and high engineering usability, and is low in requirements on production device. The prepared modifying agent can effectively overcome the demand of treating black and odorous bottom mud and a problem of resource utilization of industrial wastes, has important environment and economic benefit and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to an environment-friendly soil ecological improver, in particular to an environment-friendly soil ecological improver prepared by utilizing industrial waste residues and used for river dredging or lake sediment ecological restoration. Background technique [0002] my country's industry has achieved world-renowned achievements after decades of rapid development, but also produced a large amount of industrial solid waste, such as steel slag, water slag, and construction waste. With the advancement of industrialization, these wastes have gradually caused prominent social contradictions. On the other hand, with the advancement of urbanization and industrialization, most rivers and lakes are seriously polluted, forming black and odorous water bodies that affect people's lives, and the contradiction between ecological environment destruction and social development has beco...

AI Technical Summary

Problems solved by technology

Among them, the dehydration consolidation agent is to consolidate the organic matter and water in the sediment in the consolidation body by means of strengthening chemical modification, thereby changing the phase and state of the sediment and achieving the purpose of engineering treatment; after consolidation Bottom mud can be used as backfill for engineering projects, but the alkalinity is generally high, which is easy to cause salinization phenomena such as frost, and has a certain degree of impact on the surrounding environment. In addition, its requirements for raw and auxiliary materials and cost are relatively high , which is not conducive to large-scale promotion and industrial production; chelating stabilizers rely on the chelating or coupling effect of the chemical agent itself to combine toxic components in the sediment such as persistent organic matter and heavy metals on the chelating body in the form of chemical bonds , so as to achieve the stabilization treatment of the soil. The dosage of this agent itself is relatively large and the cost is high, and it is not conducive to improving the sludge performance of the bottom sludge. Most of these drugs are imported, and the core technology is in the hands of developed countries, which restricts the large-scale application and promotion of this technology in my country

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