Activated carbon water ion related questions

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Activated carbon are widely used Activated carbon purifies how clean water is 02021-07-18 23:14:58
Adsorption capacity refers to the amount of adsorbents adsorbed on the adsorbent per unit mass under certain conditions. It is usually expressed in terms of K adsorbents /kg of adsorbent or mass percentage, which is a sign of the adsorption capacity of the adsorbent. In industry, the amount of adsorption is called the activity of the adsorbent.activated carbon powder suppliers  The activity of the adsorbent can be expressed in two ways :(1) the static activity of the adsorbentUnder certain conditions, the equilibrium adsorption capacity of the adsorbent is its static activity.For a certain adsorption system, the static activity depends only on the adsorption temperature and the concentration or partial pressure of the adsorbed substance.   Dynamic activity of adsorbents Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent. The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions. 
Activated carbon water ion02021-06-06 18:35:31
If the gas speed is very small, the size of the adsorber is large and uneconomical.  If the gas velocity is too large, the pressure drop will increase and the adsorption efficiency will be affected.The optimum gas velocity was determined by experiment. activated charcoal wholesale australia  The adsorption design can not pursue too high adsorption efficiency, the empty tower speed value is reduced, it will make the adsorption bed volume, the amount of adsorbent and equipment cost increased greatly;On the contrary, it is not appropriate to take too large empty tower gas speed. Although the equipment cost is low, the adsorption efficiency drops a lot, and the pressure drop of the system will rise rapidly with the increase of the empty tower speed, resulting in excessive power consumption. Therefore, due to the selection of the appropriate air speed of the empty tower, the most suitable air speed of the empty tower is 0.8~1.2m/s"21, according to the empirical conclusion, this design determines Its adsorption performance mainly depends on several main material parameters and process parameters on it [8. Material parameters including carbon adsorption porosity, thickness of honeycomb structure and the content of carbon; process parameters including fluid flow rate and concentration of the adsorption properties of adsorption, can adsorption depends on the carbon structure and adsorption properties of features such as molecular weight). The curve is one of the main performance characterization of adsorption, adsorption is the adsorbate concentration ratio before and after the change over time of a function [9 '. This ratio is 0.95, the amount of adsorption properties of adsorption is called penetration capacity. Penetration capacity depending on the fluid flow rate, the concentration of the adsorbate and honeycomb carbon component content Factors such as [10. For honeycomb activated carbon, the wall thickness is a very important parameter, by changing the wall thickness to improve its adsorption efficiency. Under the same porosity, thickness increases, the honeycomb carbon content per unit volume also will increase, which can improve the adsorption capacity. This is because the wall thickness increases, the fluid channel in the cellular cross-sectional area reduced, so the real surface or volume flow rate will increase. At the same time, the contact between adsorbate and carbon efficiency will, there is a balance between the two. Under the given conditions, the balance will determine adsorption increase or decrease. If the adsorbate at higherthe diffusion rate diffuses to the inside of the honeycomb wall, and the empty adsorption site can be continuously adsorbed, so the thick-walled honeycomb should have better adsorption efficiency and adsorption capacity"Determination of air velocity and cross-sectional area of empty towerThe empty tower gas velocity is the velocity of gas passing through the entire cross section of the adsorber.The selection of air velocity not only directly determines the size and pressure drop of the adsorber, but also affects the adsorption efficiency. 
Water treatment of activated carbon02021-04-26 00:52:37
Activated carbon can realize desulfurization and denitration at the same time, no secondary pollution and renewable utilization of resources.At present, the adsorption device of activated carbon adsorption process reported in the literature is mainly fixed bed, and this process has the disadvantages of large equipment, large bed resistance, poor continuity and so on.activated charcoal wholesale uae  In this paper, the activated carbon desulfurization and denitration test bed, with the circulating fluidized bed as the main adsorption device, the activated carbon desulfurization and denitration test study.Circulating fluidized bed flue gas purification technology can effectively avoid the shortcomings of the fixed bed adsorption process, such as complex equipment, large space occupied, and unstable bed resistance, etc., and the good cooperation with the bag filter can achieve the continuity of activated carbon adsorption and   In this paper, the removal of SO2 and NO from flue gas by wood powdered activated carbon was studied in a pilot scale test rig.Some factors affecting the efficiency of desulfurization and denitration were analyzed through experiments, and economic analysis was made on the technology of combined desulfurization and denitration with activated carbon. So it is widely used in the world sewage and waste gas treatment, air purification, recovery of rare metals and solvents and other environmental protection and resource recovery and other fields.Activated carbon is divided into granular activated carbon, powder activated carbon and activated carbon fiber, but because the powder activated carbon has secondary pollution and cannot be regenerated and activated, it is limited to use GAC-granular activated carbon (granular activated carbon)85%~90% of GAC is used for water treatment and gas adsorption treatment, and its particle size is 500~ 5000U m. The pore structure of GAC is generally a tridisperse pore distribution, which has been obtained according to the International Society of Pure and Applied Chemistry(IUPAC) Classification Aperture >Large pores at 50nm, intermediate pores at 2.0~50nm and lt; 
How Activated Carbon Filters Water?0dingxinda92020-10-16 00:27:15
Our water today is cleaner because of the world’s history and discoveries along the way. Today, activated charcoal, or activated carbon, is one of the components used in water filtration systems. In 2017, activated charcoal was a major player in water filtration, but substances like olive pits, shells from nuts, and coconut fibers are also being used. activated carbon for water treatment Before the year 2025 ends, it’s expected that the global activated carbon market will be worth more than $6.6 billion. You’ve heard of the term absorb, which is to soak something up. Activated charcoal or carbon is a little different. It adsorbs odors and substances from liquids. Instead of absorbing these odors and substances, it bonds to them. That’s called adsorption. A process using oxygen turns charcoal very porous. Those tiny pores trap and hold the substances that cause off-colors and odors in water. It can trap and hold things like chlorine, toxins, and even some prescription drugs that make their way into water sources. In a household, you might have a water purification system like Brita or PUR that attaches to your faucet or a water pitcher and removes impurities and odors from your tap water. People often use them to remove the chlorine odor and taste that remains in public drinking water. In a water treatment plant, crushed activated carbon or charcoal can help remove excess chlorine, organic materials, and other impurities. To do this, the crushed carbon is added right to the water where it removes the contaminants and then is removed after it settles with other sediments in holding tanks. Once it is removed, it can move to compost areas or landfills. Sometimes, activated carbon pairs with a UV disinfection system to aid in the removal of chlorine and other compounds that affect the taste and smell of water that’s been treated. The Environmental Protection Agency lists two ways to implement an activated carbon filtration system in a water treatment plant. One is a granular activated carbon filter that is added after the rapid mix, flocculation/sedimentation, and filtration steps. Water flows into the granular activated carbon filter once the water has been in the filtration tanks. This is known as post-filtration adsorption. The second placement is as part of the filtration tank. The granulated charcoal sits in the bottom of the filtration tank where it filters out odors and other contaminants. In this type of system, you have the rapid mix, flocculation/sedimentation, and filtration.coconut shell activated carbon company 
What are the types of activated carbon for water treatment0dingxinda92021-03-22 00:29:14
Water purification activated carbon products have the characteristics of developed pore structure, large specific surface area, strong adsorption capacity, low impurity content, and repeated use of regeneration.   Activated carbon special for water purification is widely used in the deep purification of drinking water, industrial circulating water, circulating water from power plant boilers, electronics industry, beverages, and food industries.powdered carbon activated  It has a good effect on water purification. It can not only remove peculiar smell and improve the purity of water, but also has a high removal rate of various impurities in water such as chlorine, phenol, arsenic, lead, cyanide, pesticides and other harmful substances. It can be widely used to fill all kinds of large, medium and small water purifiers. It is also suitable for the decolorization and refining of sugar and refreshing drinks, as well as the purification of indoor air, especially activated carbon loaded with special ingredients, which is harmful to indoor harmful gases such as ammonia. , Formaldehyde, etc., has a good purification effect.   Classification of activated carbon for water treatment: Granular activated carbon: According to different materials, it can be divided into coconut shell activated carbon, nut shell activated carbon and coal-based activated  In general, which kind of activated carbon for water purification can be used, the final choice depends on factors such as the requirements for water quality and the scale of the water plant. Don't choose the expensive one, just choose the right one.   Nutshell activated carbon: The raw materials of nutshell activated carbon are generally peach shells, apricot shells, coconut shells and other shells. Among them, coconut shell activated carbon is the best. It is the adsorption speed, adsorption capacity, strength and other indicators are far more than other activated carbon, generally used for drinking water treatment, sugar, beverage decolorization, fish farming aquarium water purification, deodorization, pharmaceutical industry Purification, decolorization, deodorization, purification and as a catalyst directly added to the product.   Powdered activated carbon: generally used wood chips, coal as raw materials, carbonization, activation, grinding and other processes, mainly used in static adsorption operation to treat water deodorization, deodorization and small-scale industrial or urban sewage treatment, generally used as Deep processing use. 
Water treatment and purification of activated carbon02021-04-26 00:51:48
Because activated carbon has numerous small pores, large surface area, strong adsorption capacity, can adsorb a variety of organic compounds, widely used in pharmaceutical industry and chemical industry.alumina fused grit  Especially in the field of medicine, activated carbon, as a highly effective gastrointestinal cleaning agent, can effectively adsorb pesticide residues, fungicides, heavy metals, dioxins, various pathogenic bacteria and toxins in the digestive tract and human body that damage human health or cause disease wastes, harmless to human body.hsl abrasives  With the rapid develIn 1916, Langmuir studied the adsorption of monolayer molecules and proposed the Langmuir adsorption isotherm equation.Freundlich and Zsigmondy proposed the capillary condensation theory for gas adsorption and obtained the semi-empirical Freundlich adsorption isotherm equation.Temkin also suggested a semi-empirical isothermal equation. Based on Gibbs equation, Toth used dimensionless function V to derive another adsorption isotherm equation for heterogeneous surfaces.Fowler and Guggenhein derived a formula of the same form from the concept of statistical mechanics.Goldmann and Polanyi proposed the adsorption space theory, which believed that the continuous decrease in the molecular density of multiple layers on the surface of the adsorbent was caused by the weakening of the adsorption molecular force pment of pharmaceutical preparation industry and primary molecular material industry, the microencapsulated activated carbon products coated with polymer materials have been successfully trial-produced in foreign countries, and applied in clinical practice, the medical care and treatment effect is very good, many of them have been put into the market, and have achieved good economic and social benefits. It is worth noting that there is a shortage of activated carbon in China. For a long time, the production of drugs using activated carbon as raw materials has been kept in the laboratory, and no products have been marketed or used in clinical trials. 
Activated carbon purification of domestic water02021-04-17 01:23:50
And how to improve the desalination efficiency of ACF electrode by electric adsorption is explored.The main research results of this paper are as follows:activated carbon factory  (1) Study on the influencing factors: the influence of electrode, voltage, flow rate and concentration on the desalination effect of ACF electrode by electric adsorption was studied. The results?Within a certain range, the greater the electrode logarithm, the smaller the electrode spacing, the larger the voltage, the smaller the flow, the lower the concentration, and the higher the desalination efficiency of electric adsorption. The most reasonable parameters are determined as follows :; The number of electrodes is 10 pairs, the electrode spacing is 5mm, the voltage is 2.0V, the flow rate is 25mI/min, and the concentration is 600us/cm.coconut activated carbon factory  At this time, the desalination rate of electric adsorption can reach about 50%. (2) The variation characteristics of effluent conductivity with time in a complete process of "electric adsorption-desorption" were analyzed.Through three cycles of "electroadsorption-desorption" continuous operation, it is demonstrated that the electrode has a good regeneration performance, and further demonstrates its good periodicity and industrial feasibility. (3) The adsorption rules of cations and anions in the process of electric adsorption were studied respectively, and the removal rules of ions were essentially the same. In other words, in the process of ion adsorption, when other conditions remain the same, the ion removal rate is inversely proportional to the mass charge ratio, and the ion removal rate is inversely proportional to the hydration radius.In addition, the removal of heavy metal ions by electroadsorption with ACF electrode was studied.The results show that the electroadsorption has a good removal effect on heavy metal ions, and the electrode can be regenerated. (4) In order to further improve the ion adsorption rate of electric adsorption, ACF was treated with acid base with nitric acid, hydrogen peroxide and potassium hydroxide, respectively. After treatment, their desalination efficiency was improved to different degrees. The experimental results showed that the best desalination effect was obtained when 3mol/L KOH was soaked for 24 hours at room temperature, and the desalination efficiency was as high as 75%.The KOH treated ACF electrode was further studied, and it was found that it had good periodicity and regenerative performance in electroadsorption desalination. SEM images also showed that after KOH treatment, ACF filaments became finer, more tightly arranged and better hydrophilic. 
Water removal of activated carbon is effective 02021-06-09 18:23:52
As one of the means of harmless waste treatment, incineration method can quickly realize the reduction of waste, harmless and recycling, so it has been more and more widely used in China. In the process of waste incineration, toxic organic compounds such as dioxins are inevitably produced, which causes environmental pollution problems. Activated carbon powder injection combined with bag dust collector (ACI+ BF) is an effective and widely used method to control dioxin emission from incinerator flue gas. bulk activated carbon pellets  In order to provide reference and theoretical basis for the preparation and selection of activated carbon for the adsorption of dioxins, this paper carried out a study on the combined technology of activated carbon injection and double bag dust collector, the characteristics of activated carbon adsorption for dioxins and the influencing factors of activated carbon adsorption for dioxins.The adsorption and desorption isotherms of 13 kinds of commercial activated carbon were determined by low temperature nitrogen adsorption method, and the physical structures of activated carbon were calculated according to BET, T-Plot, BJH and DFT theory, and the iodine value and methylene blue value of 4 kinds of activated carbon were detected.activated carbon distributors   The physical structure characteristics of activated carbon were analyzed in detail to prepare for the subsequent experiment. the influence of wood particle size. When the particle size of wood chips in the production of powdered activated carbon is 6~40 mesh, the particle size of wood chips has no obvious effect on the product quality. The effect of sawdust particle size on product quality is related to the zinc chip ratio used. When the zinc chips are relatively small (such as 80%), the wear resistance and relative density of activated carbon decrease with the increase of sawdust size. When the size of zinc chip is large (e.g. 200%), the wood chip particle size is 0.25~2.0mm, and the wear resistance and relative density of activated carbon are not significantly affected 
Water treatment of bulk activated carbon02021-04-26 00:53:49
Activated carbon can realize desulfurization and denitration at the same time, no secondary pollution and renewable utilization of resources.At present, the adsorption device of activated carbon adsorption process reported in the literature is mainly fixed bed, and this process has the disadvantages of large equipment, large bed resistance, poor continuity and so on.alumina fused grit  In this paper, the activated carbon desulfurization and denitration test bed, with the circulating fluidized bed as the main adsorption device, the activated carbon desulfurization and denitration test study.Circulating fluidized bed flue gas purification technology can effectively avoid the shortcomings of the fixed bed adsorption process, such as complex equipment, large space occupied, and unstable bed resistance, etc., and the good cooperation with the bag filter can achieve the continuity of activated carbon adsorption and regeneration.hsl abrasives   In this paper, the removal of SO2 and NO from flue gas by wood powdered activated carbon was studied in a pilot scale test rig.Some factors affecting the efficiency of desulfurization and denitration were analyzed through experiments, and economic analysis was made on the technology of comAfter adsorption equilibrium was achieved in the adsorption capacity remained at 3.6 mg lL above, grapefruit peel activated carbon adsorption of ammonia followed pseudo second order kineticmodel of the process; by the Henry equation and Freundlich equation with correlation coefficient R'known, Henry isotherm models and Freundlich isotherm models can be used for the des Cription ofgrapefruit peel on the ammonia adsorption characteristics of activated carbon; ammonia initialconcentration,dosage, pH and temperature on the ammonia adsorption are affected, litle effect oftemperature on adsorption. (3) Adsorption at adsorption equilibrium was achieved after 3h, the adsorption capacityremained at 300 mg/kg above, grapefruit peel activated carbon adsorption of phosphate follows thequasi-second order kinetic model; Freundlich R'correlation coefficients were significant, therefore,grapefruit peel activated carbon adsorption of phosphorus found Freundlich isotherm model;initialconcentration, dosage, pH and adsorption temperature on adsorption of phosphorus are affected, pH onthe adsorption of non- large. (4) Adsorption at adsorption equilibrium was achieved after 14h, the adsorption capacityremained at 21.5 mg / g above. Grapefruit peei activated carbon Cr () in the adsorption processfollowed pseudo second order kinetic model; by the Langmuir equation and Freundlich equation of thecorrelation coefficient R' known,consistent with Langmuir isotherm model and the Freundlichisotherm model.Using Langmuir isotherm model to analyze the experimental data obtained in thesolution pH 4, the maximum adsorption capacity was 26.25mg / g;Freundlich isotherm model using 
Treatment of water with column activated carbon02020-12-24 23:49:03
1. Activated carbon-sand filter double-layer filter material filter, that is, columnar activated carbon replaces part of the sand filter material in the original sand filter. Charcoal-sand double-layer filter media. honeycomb activated carbon  After the adsorption of the carbon layer and the filtering use of the sand layer, it can effectively remove organic pollutants in the water. It can also remove ammonia. In order to meet the requirements of filtration and adsorption, it is common to spread 12×40 mesh or 8×30 mesh activated carbon (active carbon mesh) on a sand layer tens of centimeters thick. The activated carbon layer with a thickness of 40cm is sufficient to remove organic matter, which can reduce the amount of chlorine required and eliminate odors. And it has the talent to remove pesticides and other organic matter, and the service life is 0.5 to 5 years. 2. Use columnar activated carbon to replace all sand filter materials in the sand filter to make honeycomb activated carbon for adsorption and filtration purposes. 3. Separate activated carbon pool after the fast filter. That is, the GAC filter is arranged behind the sand filter. Hold a secondary filtration. The sand filter must cut off the alum. The activated carbon pool adsorbs organic matter, phenol and  Compared with the above two processes, the cost of capital construction of a single activated carbon pool is higher. But it can use more activated carbon adsorption, lower operating costs, easy to change activated carbon, and can more effectively remove TOC, volatile organic compounds and special organic compounds.
How to use water purification activated carbon correctly02021-02-02 17:55:59
1. Before using activated carbon for water purification, we must clean and remove dust, otherwise the dust will directly affect the cleanliness of water quality.activated charcoal wholesale uk  It is recommended not to rinse with fresh tap water, because the porous in activated carbon for water purification once adsorbs a large amount of tap water. Bleaching powder, then placed in the filter, will cause a certain degree of damage to the water quality. 2. If we only simply clean, there is no way to clean the impurities in the porous activated carbon for water purification, so we must replace the activated carbon every once in a while to prevent the activated carbon from losing its adsorption effect due to saturation. The general replacement time is about once or twice a month, so as to ensure that the activated carbon can continuously remove the harmful substances in the water. 3. When a quantitative water purification activated carbon is used, we can observe whether the water quality has changed at the beginning of use, and pay attention to the results. When it is judged that the water purification activated carbon has lost its effect, it can be replaced as a basis.  4. When we put some medicines to treat fish diseases, we should take out the activated carbon for water purification temporarily to prevent the medicine from being affected by the adsorption capacity of the activated carbon. 
What is the role of powdered activated carbon in water treatment0dingxinda92021-03-01 01:04:46
Generally, activated carbon for water treatment is nothing more than nut shell activated carbon, coconut shell activated carbon, powdered activated carbon, and columnar activated carbon. These types of activated carbon can be used in water treatment, which can play a role in deep purification of water quality. Filter tanks use granular activated carbon to purify water. Compared to if shell activated carbon, coconut shell activated carbon and coal columnar activated carbon, this type of activated carbon has strong adsorption capacity and low ash content.  bulk activated charcoal pellets   Another point is that it can be filled into the container to filter and use. More convenient. Powdered activated carbon is suitable for the purification and decolorization of colored sewage. When the water is colored, granular activated carbon can remove part of the color, but it is difficult to remove it completely. At this time, powdered activated carbon is needed for treatment. The powdered activated carbon has a huge pore structure that can absorb the colors in the water while also adsorbing organic matter and harmful bacteria in the water. activated coconut charcoal powder It is just that the powdered activated carbon needs to be added when it is used. After thorough mixing, the filtered powdered activated carbon is finally removed. The procedure is more cumbersome compared to other activated carbons. However, the purification and decolorization ability of powdered activated carbon is much better than that of other activated carbons. Generally, powdered activated carbon is used for decolorization of food, wine, and medicine. 

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