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Advanced Oxidation Processes For Chlorobenzene Contaminant Removal
On the Advanced Oxidation Process for Removing Chlorobenzene Pollutants
I heard that in today's world, the industry is prosperous, but the pollution of chlorobenzene is very harmful. I, Linshang Chemical Workshop, have been working hard to study the method of removing chlorobenzene, especially the advanced oxidation process. I would like to report it in detail for everyone.
Chlorobenzene is a chemical substance with stable properties. It exists in the environment and is difficult to dissolve and eliminate. It enters the water body and soil, harming life and harming human health. It may cause diseases in the organs or disturb the order of genes, so it is an urgent task to remove the pollution of chlorobenzene.
Advanced oxidation process, with strong oxidation ability, breaks the structure of chlorobenzene and turns harmful into harmless. The core of this process lies in the production of strong oxides such as hydroxyl radicals, which have strong oxidizability and no selectivity, and can quickly react with chlorobenzene and crack its chemical bonds.
First, Fenton's method. Ferrous ions combine with hydrogen peroxide to generate hydroxyl radicals. Ferrous ions are catalysts to promote hydrogen peroxide, which should be as follows:
\ (Fe ^ {2 +} + H_ {2} O_ {2}\ rightarrow Fe ^ {3 +} + OH ^{ - }+\ cdot OH\)
Hydroxy radical encounters chlorobenzene, grabs its electrons, breaks the structure of the benzene ring, and gradually converts carbon dioxide, water and inorganic chlorine. However, in this method, it is necessary to control the pH, which is generally good in acidic environments, and there are too many ferrous ions, which consumes hydroxyl radicals and is unfavorable for decontamination.
Second, the Fenton-like method. Replace ferrous ions with iron oxides and supported iron catalysts to expand the applicable environment and increase the catalytic effect. If iron is supported on activated carbon, it not only increases the dispersion of the catalyst, but also the activated carbon can absorb chlorobenzene and cooperate with oxidation to improve the rate of decontamination.
Third, the method of photocatalytic oxidation. Using titanium dioxide as a catalyst, under the light radiation, the electron-hole pair is produced. The hole grabs the adsorbent electrons and produces hydroxyl radicals on the catalyst surface, thereby removing chlorobenzene. This method can benefit from natural light, save energy, and the catalyst is easy to recover and reuse. However, its catalytic efficiency is restricted by light intensity and catalyst activity, and needs to be refined.
Fourth, the method of ozone oxidation. Ozone is a strong oxidant, which can directly break the structure of chlorobenzene, and can also produce hydroxyl radicals to strengthen oxidation. Ozone enters chlorobenzene-containing water, or directly reacts with chlorobenzene, or decomposes into hydroxy radicals in the aqueous phase, producing hydroxyl radicals and removing chlorobenzene. However, the preparation of ozone requires energy, and the solubility is low, and the mass transfer is limited, so it is often combined with ultrasound, ultraviolet, etc. to increase efficiency.
Wu Linshang Chemical Workshop has studied all methods. In the context of experiment, adjust various parameters to find the best effect. After repeated tests, it is known that the combination of different methods can make up for the lack of a single method. For example, photocatalysis-ozone combination, photostimulation of electron-hole pairs, promoting ozone decomposition, increasing the yield of hydroxyl radicals; Fenton-adsorption combination, Fenton-breaking chlorobenzene structure, adsorbent in addition to intermediate products, improving the overall decontamination ability.
Although the advanced oxidation process has achieved remarkable results in removing chlorobenzene pollution, there are still challenges. The process is complicated and the cost is still high. For large-scale use, it is necessary to reduce costs and increase efficiency. And the properties of intermediate products still need to be studied in detail to prevent secondary pollution.
My workshop is determined to continue studying this technique, seeking a perfect method, hoping to remove the pollution of chlorobenzene, and restore peace to the world, maintaining ecological peace, and seeking blessings for future generations.
I heard that in today's world, the industry is prosperous, but the pollution of chlorobenzene is very harmful. I, Linshang Chemical Workshop, have been working hard to study the method of removing chlorobenzene, especially the advanced oxidation process. I would like to report it in detail for everyone.
Chlorobenzene is a chemical substance with stable properties. It exists in the environment and is difficult to dissolve and eliminate. It enters the water body and soil, harming life and harming human health. It may cause diseases in the organs or disturb the order of genes, so it is an urgent task to remove the pollution of chlorobenzene.
Advanced oxidation process, with strong oxidation ability, breaks the structure of chlorobenzene and turns harmful into harmless. The core of this process lies in the production of strong oxides such as hydroxyl radicals, which have strong oxidizability and no selectivity, and can quickly react with chlorobenzene and crack its chemical bonds.
First, Fenton's method. Ferrous ions combine with hydrogen peroxide to generate hydroxyl radicals. Ferrous ions are catalysts to promote hydrogen peroxide, which should be as follows:
\ (Fe ^ {2 +} + H_ {2} O_ {2}\ rightarrow Fe ^ {3 +} + OH ^{ - }+\ cdot OH\)
Hydroxy radical encounters chlorobenzene, grabs its electrons, breaks the structure of the benzene ring, and gradually converts carbon dioxide, water and inorganic chlorine. However, in this method, it is necessary to control the pH, which is generally good in acidic environments, and there are too many ferrous ions, which consumes hydroxyl radicals and is unfavorable for decontamination.
Second, the Fenton-like method. Replace ferrous ions with iron oxides and supported iron catalysts to expand the applicable environment and increase the catalytic effect. If iron is supported on activated carbon, it not only increases the dispersion of the catalyst, but also the activated carbon can absorb chlorobenzene and cooperate with oxidation to improve the rate of decontamination.
Third, the method of photocatalytic oxidation. Using titanium dioxide as a catalyst, under the light radiation, the electron-hole pair is produced. The hole grabs the adsorbent electrons and produces hydroxyl radicals on the catalyst surface, thereby removing chlorobenzene. This method can benefit from natural light, save energy, and the catalyst is easy to recover and reuse. However, its catalytic efficiency is restricted by light intensity and catalyst activity, and needs to be refined.
Fourth, the method of ozone oxidation. Ozone is a strong oxidant, which can directly break the structure of chlorobenzene, and can also produce hydroxyl radicals to strengthen oxidation. Ozone enters chlorobenzene-containing water, or directly reacts with chlorobenzene, or decomposes into hydroxy radicals in the aqueous phase, producing hydroxyl radicals and removing chlorobenzene. However, the preparation of ozone requires energy, and the solubility is low, and the mass transfer is limited, so it is often combined with ultrasound, ultraviolet, etc. to increase efficiency.
Wu Linshang Chemical Workshop has studied all methods. In the context of experiment, adjust various parameters to find the best effect. After repeated tests, it is known that the combination of different methods can make up for the lack of a single method. For example, photocatalysis-ozone combination, photostimulation of electron-hole pairs, promoting ozone decomposition, increasing the yield of hydroxyl radicals; Fenton-adsorption combination, Fenton-breaking chlorobenzene structure, adsorbent in addition to intermediate products, improving the overall decontamination ability.
Although the advanced oxidation process has achieved remarkable results in removing chlorobenzene pollution, there are still challenges. The process is complicated and the cost is still high. For large-scale use, it is necessary to reduce costs and increase efficiency. And the properties of intermediate products still need to be studied in detail to prevent secondary pollution.
My workshop is determined to continue studying this technique, seeking a perfect method, hoping to remove the pollution of chlorobenzene, and restore peace to the world, maintaining ecological peace, and seeking blessings for future generations.
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