What are the different types of chemical oxidation methods for color removal?
Best insight from top research papers
Chemical oxidation methods for color removal include electrochemical advanced oxidation processes (EAOPs) , Fenton and Fenton-like oxidation processes , ozone-UV treatment , and coagulation and ozonation . In the EAOPs, persulfate (PS) activation is combined with electrogenerated H2O2, cathodic reduction, and anodic oxidation using different types of electrodes . The Fenton and Fenton-like processes involve the use of iron and hydrogen peroxide to remove color and Chemical Oxygen Demand (COD) . Ozone-UV treatment and zinc oxide photocatalyst are used for advanced oxidation processes . Coagulation and ozonation are used to remove color and permanganate index (CODMn) from water . Electrochemical decolorization on a platinum electrode is another method, where the efficiency is influenced by the supporting electrolyte, current density, and initial pH .
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| The paper does not provide information about different types of chemical oxidation methods for color removal. | |
31 Dec 2017 | The paper does not provide information about the different types of chemical oxidation methods for color removal. |
| The paper does not mention different types of chemical oxidation methods for color removal. | |
| The paper does not provide information about different types of chemical oxidation methods for color removal. | |
| The paper does not provide information about different types of chemical oxidation methods for color removal. |
Related Questions
How can advanced oxidation processes be used to degrade carotenoids]?5 answersAdvanced oxidation processes (AOPs) utilize reactive oxygen species (ROS) like hydroxyl radicals (∙OH) to efficiently degrade pollutants. These processes involve the generation of free radicals with high oxidizing power, making them effective in breaking down various compounds, including carotenoids. AOPs, such as photocatalysis, accelerate oxidation reactions by producing free radicals upon exposure to appropriate wavelengths of light, leading to the degradation of organic pollutants in water and air. The specificity of AOPs allows for the degradation of pollutants regardless of their chemical nature, making them versatile for treating contaminants like carotenoids. Despite their effectiveness, AOPs may have drawbacks such as high costs and the formation of reaction byproducts. Overall, AOPs offer a promising, eco-friendly, and cost-effective solution for degrading carotenoids and other pollutants in effluent treatment processes.
Why color removal from wastewater quicker than cod removal?5 answersColor removal from wastewater is generally quicker than COD removal due to the nature of the treatment processes and the characteristics of the contaminants. Studies have shown that color removal can be achieved within a relatively short time, while COD removal often requires more extended contact times and specific operational parameters. For instance, in the case of using nanoscale zero-valent iron (nZVI) particles for color and COD removal, the results indicated that color removal efficiencies were notably high at different wavelengths compared to COD removal efficiency. Similarly, in the study involving the treatment of institutional wastewater using solar-photo-Fenton process, higher removal rates were observed for color compared to COD. These findings suggest that the mechanisms involved in color removal processes are more rapid and efficient compared to those for COD removal.
What are the most used advanced oxidation processes for water treatment?5 answersThe most commonly used advanced oxidation processes (AOPs) for water treatment include UV/Cl2, UV/NH2Cl, UV/ClO2, and UV/peracetic acid (PAA). These AOPs rely on the generation of free radicals through UV photolysis to degrade pollutants efficiently. Additionally, AOPs like Fenton (H2O2/Fe2+), photo-Fenton (H2O2/UV/Fe2+), and electro-Fenton are also widely utilized for the remediation of organic contaminants in wastewater. AOPs generate reactive free radical species like H ● , OH ● , HOO ● , SO 4 •, which attack organic and inorganic compounds, enhancing biodegradation and minimizing toxicity in wastewater. Furthermore, researchers are exploring strategies to intensify UV-AOPs by optimizing operational parameters, developing photocatalytic materials, and integrating different UV-AOPs for pollutant treatment. These advancements aim to increase efficiency and reduce operational costs, making AOPs more feasible for industrial-scale water treatment.
What are the most effective methods for removing color from kerosene?4 answersThe most effective methods for removing color from kerosene include mixing the oil with N-Methyl-2-pyrrolidone (NMP) and passing it through one or more columns, followed by the addition of water and glycerin to the oil. The mixture is then subjected to centrifugation to remove a second portion of NMP, as well as some of the water and glycerin. Another method involves adding a reagent solution obtained by dissolving caustic alkali alcohol solution and organic dyes into a kerosene-soluble solvent, which helps to discolor the organic dyes present in the kerosene. Additionally, a kerosene cleaning agent consisting of multiple chemical substances has been developed, which effectively removes stains and is non-toxic and harmless.
Which pilot photocatalyst is most effective at removing colors pollutants from water?3 answersThe CuCe-Ferrite/TiO2 composite photocatalyst has been found to be highly effective at removing color pollutants from water, achieving a photodegradation efficiency of up to 100% for reactive red 250 dye. This composite catalyst was shown to have higher efficiency compared to TiO2 nanoparticles alone. The use of photocatalysis with semiconductor nanostructured materials, such as graphene-based titanium dioxide catalyst (rGO@TiO2), has also been proven to be an effective method for the removal of persistent pollutants, including organic micropollutants, from wastewater. Additionally, the photoactive metal-organic frameworks (MOFs) have been identified as a promising strategy for the degradation of organic pollutants in water. These MOFs can be tuned for better photocatalytic activity by adjusting the metal ions/cluster and organic ligands. Overall, the CuCe-Ferrite/TiO2 composite and graphene-based titanium dioxide catalyst (rGO@TiO2) have shown great potential as pilot photocatalysts for the removal of color pollutants from water.
What are the different methods for removing the color and odor of kerosene?5 answersThere are several methods for removing the color and odor of kerosene. One method involves using a high-accuracy filtering device that utilizes stacked filter paper to trap impurities and improve filtering accuracy and pollutant-holding capacity. Another method is the use of activated carbon, obtained from burnt woods, to deodorize kerosene through adsorption. Liquid extraction with concentrated sulphuric acid is also an effective method for removing odor in kerosene, with the optimum kerosene to sulphuric acid ratio being 50:50% (v/v). Additionally, an adsorption purifying tower can be used to mix aviation kerosene with a purifying agent and further adsorb and filter impurities using stainless steel wire net, filtering felt, and filtering cloth. Finally, a method involving ozone gas and an adsorbent such as zeolite or a basic adsorbent can be used to remove impurities from kerosene.