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; 
Water purification of activated carbon02021-11-25 22:06:14
The effect of the amount and adding method of activated carbon on smoke emission of cigarettes was investigated. It was found that the filtration efficiency of ternary compound filter was higher than that of binary compound filter under the influence of plasticizer when the amount of activated carbon was constant. With the increase of the amount of activated carbon, the filtration efficiency of the two kinds of composite filters increases. The effects of the amount of activated carbon on the filtration efficiency of the compounds with different volatiles are different. The effects of the amount of activated carbon on the filtration efficiency of the isomers are similar due to their close molecular weight and boiling point. When the dosage is small, the competitive adsorption is easy to occur. The adsorption amount of refractory components such as acetaldehyde is small, and the competition can be reduced by increasing the dosage. The filtration efficiency of refractory components shows an obvious upward trend with the increase of the dosage. When the temperature is below 600℃, the specific surface area of carbonized material increases with the increase of temperature.When 600~900℃, the specific surface area reaches a certain value: 250~300 m2/g; when above1000℃, the specific surface area shrinks rapidly. When the carbonization temperature is above 800℃, the reaction performance of carbonized compounds and activation gas gradually becomes weaker, so the carbonization temperature is generally below 1000℃. However, if the residual volatile content and thermal effect are taken into account, the most suitable temperature should be 600~700℃39]. The carbonized substance obtained from the carbonization process is placed in water vapor or a mixture of water vapor and combustion gas and heat treated at 800~1000℃, which is called the activation process. The commonly used activation gases are carbon dioxide, water vapor, oxygen, etc., due to the oxidation reaction of these gases on the surface of the carbonized substance, eroding the carbonized substance, thus producing a rich porous structure.(2) Chemical method. Chemical activation method is a method of preparing activated carbon by adding chemicals to the raw materials used or impregnation into the raw materials or carbonized materials, and then heating it at high temperature in inert gas.The chemicals used in chemical activation are generally dehydrating.The more commonly used activator is: inorganic acid varieties have phosphoric acid, sulfuric acid and boric acid, salt varieties have zinc chloride, calcium carbonate and potassium sulfate, alkali varieties have sodium hydroxide, potassium hydroxide, etc. 
The use of activated carbon and water refining02021-08-27 23:20:25
Adding appropriate chemical reagents will play the role of catalytic oxidation [73], and these chemical reagents will also increase the active point of activation reaction, which is conducive to the development of activated carbon pores.  Now at home and abroad the main research work is mainly the following aspects: a, additive in the functional mechanism of manufacturing activated carbon energy gao jun of China university of mining mechanism of additives in the manufacturing activated carbon made detail [4, pointed out that: the catalyst in the carbonization stage prompted carbon the destruction of the molecular structure of aromatic raw materials, to "structure" of disordering, provides a good initial activation reaction conditions, is an important factor to improve the activation of activated carbon pore. In the process of activation, potassium to strengthen the directionality of the pore, thereby reducing the unnecessary on ignition, and accelerated the process of pore forming, And pore distribution is given priority to with microporous activated carbon; refractory in the catalyst to ash content of SiO2 and Al, 03, etc, into acid soluble potassium nepheline chemical compounds such as magnesium and calcium silicon stone is the key to improve pickling deliming rate factor b and additives on the activated carbon adsorption properties, pore structure and pore size distribution - adding different additives. The influence of the activated carbon: c, chemicals for coking products. coal based granular activated carbon  
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 
Purification water of activated carbon02021-12-29 21:38:09
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 carbon pellets wholesale  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  Air velocity of empty tower :U= 1.0m /s.Original conditions:Treatment air volume :Q=20000 m'h, design temperature is 35° C, pressure is 1.01325×103Pa Since the proportion of air in exhaust gas is far greater than that of pollutants, the properties of exhaust gas can be approximately viewed as the thermophysical properties of dry air. Please refer to Appendix 9 of Principles of Chemistry to obtain the following data:Properties of air mixture:Fluid density P;=1.147kg/ m', viscosity u,= 1.94×10-5 Pa.S, specific heat capacity C,=1.005kJ/(kg."C) 
Purification water of activated carbon02021-12-29 21:48:20
On the basis of industrial test, the technical indexes, pore structure and adsorption properties of activated carbon for water purification by crushing block were analyzed and studied. The results show that there are two kinds of micropores in the activated carbon, and the contribution of micropores to the specific surface area, activated carbon wholesale pore volume and adsorption performance of activated carbon is much larger than that of medium and large pores. It is a kind of activated carbon with low ash content, high strength, narrow pore distribution, high specific surface area and excellent adsorption performance. After analysis and calculation, the mesopar diameter of activated carbon is 6.71A, BET surface area is 764.83m2 /g, Langmuir specific surface area is 1229.5m3 /g, internal specific surface area is 91.50m3 /g, external specific surface area is 673.33m37g, and micropore volume is 0.133 cm3/g. When P/P=0.30, the maximum specific surface area is 809.776 m'7g, and the maximum pore volume is 0.412 cm'/gc activated carbon for gold recovery 
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. 
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. 
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. 
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 

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