Activated carbon purification of domestic water related questions

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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. 
Activated carbon for domestic water purification treatment02021-04-17 01:03:32
Activated carbon has a wide range of applications: air purification, the production of air filters, can absorb and filter the air in 03 S02 NO2 and odor, gas, smoke and other harmful gas rest, can be used for room, kitchen utensils and other polluted indoor air purification;activated carbon factory  Water purification, can remove the organic matter and heavy metal ions and mildewy odor, bacteria and used in water decolorization, used in drinking water industry, beverage, beer, medicine, sugar and other industries water purification, decolorization process and pure water, direct drinking water production equipment; coconut activated carbon factory   Sewage treatment: can be used to treat the chemical industry, electroplating, metallurgy, printing and dyeing, leather, medicine and other sources of sewage, the removal of organic materials, bacteria and organic dyes in the water.Especially the treatment of toxic and harmful wastewater containing high metal ions;Organic solvent recovery: to benzene, ketone, fat, alcohol and other types of organic solvents can be adsorbed recovery;It can be used in solvent recovery devices such as glue spray paint and film, in benzene purification and recovery devices and in environmental protection projects of waste gas and sewage treatment.Health and anti-expansion: made of gas masks, gas and dust masks, gas jackets can have good adsorption and shielding effect on toxic gases; Medical treatment and biological engineering: can be used for the manufacture of artificial kidney, liver adsorbent, used in biological engineering for enzyme fixation; Daily life: can be used in refrigerator deodorization, fruit and vegetable preservation, household water purifier, cigarette filter, deodorization and disease prevention insoles and other daily necessities production;Other aspects: can be used as catalyst carrier, stationary phase of gas chromatography, solar heat collector and the production of precious metals (Ag andMarket demand forecastActivated carbon has a wide range of applications: air purification, the production of air filters, can absorb and filter the air in 03 S02 NO2 and odor, gas, smoke and other harmful gas rest, can be used for room, kitchen utensils and other polluted indoor air purification; 
Activated carbon air purification and water purification02021-08-30 00:09:15
Increase the number of activated carbon mesh and millimeter corresponding table content and related websites. It's not advertising. It's a lot of help to consumers. Now activated carbon is in accordance with the eye, but we do not know that the eye can be changed into  Activated carbon is widely used in all aspects of industrial and agricultural production, such as the petrochemical industry without alkali deodorization (refined demercaptan), ethylene desalting water (refined filler), catalyst carrier (palladium, sales, men, etc.), water purification and sewage treatment; Water quality treatment and protection of power plants in the power industry; Chemical industry of chemical catalyst and carrier, gas purification, solvent recovery and oil and other decolorization, refining; Food industry beverage, wine, MSG mother liquor and food refining, decolorization; Gold extraction and tailings recovery in the gold industry; Environmental protection industry sewage treatment, waste gas and harmful gas treatment, gas purification; As well as related industries of cigarette filter, wood floor moistureproof, taste absorption, automobile gasoline evaporation pollution control, the preparation of various impregnation liquid, etc. Activated carbon in the future will have excellent development prospects and broad sales market. pelletized activated carbon 
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 
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. 
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) 
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. 
Activated carbon water purification and development02021-11-23 00:15:59
Distillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃. ② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on.norit granular activated carbon  Industry should beActivated carbon also requires high mechanical strength, good wear resistance, its structure is stable, small energy required for adsorption, in order to be conducive to regeneration.Activated carbon for oilDecolorization, deodorization, gas separation, solvent recovery and air conditioning of fat, beverage, food and drinking water, used as catalyst or adsorbent for body and gas mask.Physical characteristics:Activated carbon is a kind of multi-aperture carbonization, has a very rich pore structure, has good adsorption characteristics, its adsorption by physical and chemicalAbsorbed from the force, the appearance of the color and lustre is black.Its composition in addition to the main carbon, but also contains a small amount of hydrogen, nitrogen, oxygen, its structure is shaped like a hexagon, due to the irregular hexagon structure, determine the characteristics of its body also incandescentand high surface area, each gram of activated carbon has the equivalent of 1000 square meters than the surface. coal based granular activated carbon 
Purification of drinking water with activated carbon02021-10-22 01:30:16
The background of the project and the necessity of investment construction In recent years, with the continuous decrease of wood resources and the deterioration of ecological environment worldwide, environmental protection, the realization of sustainable development and comprehensive utilization of resources have become a common concern ofpeople and a problem that the international community is committed to solving.To further improve the level of comprehensive utilization of wood resources and the added value of products has become the main goal of the world wood processing industry.granular activated charcoal  China has a large population and is short of forest resources. The per capita forest stock volume is 0.12m3, lower than the world average level of 0.65 m3.China's wood comprehensive utilization level is also low, only 40%, and advanced countries can reach 80%, and in the level of technology, product grade, production efficiency, market competitiveness and other aspects compared with the developed countries also have a big gap. coal activated carbon supplier 
Purification of drinking water with activated carbon02021-11-13 00:19:51
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. 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. 
Activated carbon water purification and products02021-11-25 22:20:53
It was found that the contents of volatile compounds and flavor components were related to the type of cigarettes and the amount of tar. The contents of volatile compounds and flavor components were higher in the flue-cured cigarettes than in the mixed cigarettes, and higher in the high tar cigarettes than in the low tar cigarettes. The types of fragrance components in smoke of different types of cigarettes are basically the same, but there are great differences in content. The contents of furfural, furfuryl alcohol, maltol, 5-hydroxymethylfurfural, linolenic acid, methyl linolenic acid, linoleic acid, methyl palmitate and other components in flue-cured cigarettes were significantly higher than those in mixed cigarettes. This is related to the higher carbohydrate content in flue-cured cigarettes. Mixed-type cigarettes contain high content of 3-methylpentanoic acid and nitrogen heterocyclic compounds such as cotinine, ho ah, and methamine due to their formulations of burley tobacco and spice tobacco. The filtering law of activated carbon for different types of cigarettes is basically the same, that is, the filtering efficiency is related to the properties of compounds, especially with the molecular weight and boiling point of compounds. The filtration efficiency of activated carbon on flue-cured cigarettes was lower than that of mixed cigarettes.Activated carbon water purification and products  norit granular activated carbon  The adsorption characteristics of pure acetone gas on activated carbon were measured. Langmuir model and Dubinin-Radushkevichv (D-R) model were used to fit the adsorption data, respectively. The Langmuir model and D-R model were compared from the Angle of model fitting accuracy and prediction of adsorption heat. Compared with Langmuir model, D-R model has higher fitting correlation coefficient and lower average relative standard deviation for adsorption data, so the fitting result is better. Based on 10-4-3 potential function, the theoretical adsorption heat of pure acetone gas on activated carbon is 17.9 kJ/mol, which is relatively small, indicating that the adsorption is mainly physical adsorption. The predicted value of adsorption heat of D-R model is 15.8kJ/mol, which is close to the theoretical calculated value, and the predicted value of adsorption heat of Langmuir model is 40.7 kJ/mol, which is much larger than the theoretical calculated value. It is found that the key to predict the filtration efficiency of different compounds is to predict the heat of adsorption of compounds. The filtration efficiency is mainly related to the adsorption temperature v, the amount of activated carbon, pore volume, molecular weight of the compound, collision diameter and energy parameters. The influence of pore size on filtration efficiency and adsorption selectivity can be obtained by analyzing adsorption energy. coal based granular activated carbon 

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