Method for rapidly manufacturing nano-palladium/iron with scattered dispersing agent and scattered surface active agent

Abstract

The invention relates to a method for rapidly manufacturing nano-palladium/iron with a scattered dispersing agent and a scattered surface active agent. A liquid phase reduction method is adopted, under the condition that sodium carboxymethylcellulose exists, a strong reducing agent KBH4 is used for reducing Fe2+, and zero-valent nano-iron is obtained; the surface of the zero-valent nano-iron is loaded with palladium through potassium chloropalladite, the surface active agent Brij35 at certain concentration and the dispersed nano-palladium/iron are mixed, and therefore the nano-palladium/iron with the scattered dispersing agent and the scattered surface active agent is manufactured. The method has the beneficial effects that the particle diameter of manufactured nano-palladium/iron particles is small, distribution is even, the particle diameter is about 8 nanometers, stability is good and can be kept over 5 d, reaction activity is high, the degradation efficiency of polychlorinated biphenyl in soil is 12.2% higher than that obtained without the addition of the surface active agent, and the method can be widely applied to the field of environmental modification; and required manufacturing equipment is simple, the process is convenient, a reaction is conducted at the normal temperature under the normal pressure and can be finished within only 60 min, secondary pollution can be avoided, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a rapid preparation method of nano-palladium / iron dispersed by a dispersant and a surfactant, in particular to a preparation method of nano-palladium / iron degrading chlorinated organic matter in soil, belonging to the technical field of nano-environmental functional materials and environmental restoration . Background technique [0002] Since it was proposed in the late 1980s that metallic iron filings can be used for in-situ remediation of groundwater, especially the emergence of permeable reactive wall (PRB) groundwater in-situ remediation technology, the use of zero-valent iron metals to reduce pollutants has become a very active method. research field. The zero-valent iron system is cheap, efficient, and simple, and can quickly reduce and degrade various pollutants in water bodies, and even catalytically reduce and degrade chlorine-containing organic pollutants with complex structures, such as herbicides, polychlorinated b...

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Problems solved by technology

[0003] The invention provides a rapid preparation method of nano-palladium / iron dispersed by a dispersant and a surfactant. For the above-mentioned problems, especially the problem that highly adsorbable chlorinated organic pollutants in soil are difficult to remove, the invention overcomes the impact of nano-materials on Incomplete degradation of chlorinated organic pollutants in soil

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