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The role of nanometer titanium dioxide in soil and water pollution control

2019-04-11
At present, nanomaterials play a very important role in the treatment of environmental pollution.This kind of remediation material will produce REDOX reaction and adsorption after direct contact with pollutants, effectively reducing the content and concentration of organic pollutants and heavy metals in polluted water and soil, so as to achieve the purpose of purifying water and soil.

 
Nanometer titanium dioxide is applied to the remediation of polluted water
Firstly, in organic sewage treatment, photocatalyst can be used to degrade organic pollutants in water, among which nano TiO2 plays a role of degradation. With the help of sunlight, it can catalyze the treatment of oxidized water to play a role of degradation.The nanomaterial is capable of degrading more than 80 kinds of pollutants (toxic), making them much less toxic, and the pollutants will eventually exist in the form of water and carbon dioxide.
 
Second, during the period of inorganic wastewater treatment, inorganic wastewater of heavy metal is more, serious impact on human health, in the concrete processing staff nano TiO2 materials can be used to deal with that by the help of adsorption function to effective adsorption of heavy metal ions in water, and then through the REDOX reaction to restore metal, making it the metal crystals, which at the same time of reducing wastewater toxicity can also be effective recycling of metals such as gold, platinum, realize the value of recycling.
 
In addition to the sewage treatment of nano TiO2 powder materials have a very ideal effect, you can also use the Feo, load type nano Feo, nanometer ZnO, load type nano TiO2 powder and nano material such as chelating agent, water purification effect of different material with slightly different, sewage management department staff can grasp different purification treatment application advantages, reasonable choice purification methods, effective sewage treatment.

Nano titanium dioxide powder is used for remediation of contaminated soil
 
Firstly, in the remediation of heavy metal contaminated soil, nano materials are added to the contaminated soil to adsorb heavy metal ions in the soil, and then precipitation-coprecipitate is generated, so that the migration and transformation performance of heavy metal ions can be well controlled.Zero-valent iron nanoparticles can directly interact with pollutants, and then reduce or completely remove the toxicity and pollutants in the soil under the action of adsorption capacity and REDOX reaction.When using nano-titanium dioxide powder particle material to treat heavy metal contaminated soil, it is easy for the material to interact with chromium and copper, and then promote the REDOX of chromium metal under the synergistic catalytic effect. Therefore, the repair effect of nano-particle material in the remediation and treatment of soil pollution caused by chromium metal is good.
 
Secondly, for the remediation and treatment of soil polluted by organic matters, photocatalytic degradation technology of soil is often used in the treatment of soil polluted by such conditions. This technology belongs to a new remediation technology of contaminated soil and has a very broad prospect in the treatment of soil pollution caused by the heavy use of pesticides.For example, after the soil is contaminated by pesticides, the use of TiO2 material can conduct all-round degradation treatment of the harmful substances of organochlorine pesticides.The nano-iron particle material was placed in the soil, and two or three days later, the test site determined in advance was analyzed, and it was found that the nano-material at this point had completely reacted with the soil, and the dechlorination effect of organic chloride was found to be ideal, the concentration of trichloroethylene was greatly reduced, and the clearance rate was more than 99%.