Ding Xinda activated carbon decomposition material related questions

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Ding Xinda activated carbon decomposition material02021-12-14 23:35:07
With the rapid development 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.activated carbon gold mining  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 company  Experts said that with the continuous improvement of people's life quality and health care consciousness enhancement, as well as the rapid development of all kinds of industrial, environmental pollution has been increasingly serious, people an opportunity to contact with a variety of harmful material, activated carbon and activated carbon as the leading raw material to produce medicines and health products, medical market will become a major conventional leading consumer products, 
Ding Xinda activated carbon decomposition02021-12-14 23:34:22
The experimental results show that the adsorption equilibrium of pure components is in good agreement with the Langmuir equation. In the case of multi-component adsorption, due to the competition and interference between each component, the component with strong adsorption ability can replace the other component that has been absorbed, so that the penetration curve of each component has obvious changes. activated carbon for gold recovery  The penetration point of the components with relatively weak adsorption capacity was significantly advanced, while the penetration time of the components with strong adsorption capacity was delayed. In this paper, E-L equation and IAST theory are used for theoretical prediction and analysis of multi-component adsorption equilibrium, and compared with experimental results.activated carbon wholesale   The results show that although the prediction of total adsorption amount by E-L equation is in good agreement with the experimental results, the prediction of each component adsorption amount by E-L equation often produces positive and negative deviation, and the average error is usually more than 20%. However, IAST can eliminate the positive and negative deviation well, and the average error is less than 10%, which is more consistent with the experimental results. The operating parameters showed that the adsorption capacity of activated carbon would decrease with the increase of temperature, gas velocity or humidity. The appropriate operating range is: temperature within 40℃, gas speed between 0.1~0.5 m/s, humidity is best not more than 40%. In this rang 
Ding Xinda activated carbon decomposition adsorption02021-12-27 22:37:41
Due to the high requirement of activated carbon for water pretreatment, and the high price of activated carbon, so in wastewater treatment, activated carbon is mainly used to remove trace pollutants in wastewater, in order to achieve the purpose of deep purification.www.powdered-activated-carbon.com  1. Activated carbon treatment of wastewater containing chromium. Chromium is a kind of metal raw material used in electroplating. The hexavalent chromium in wastewater exists in different forms with different pH values. Activated carbon has a very developed microporous structure and high specific surface area, has a strong physical adsorption capacity, can effectively adsorb Cr (V) in wastewater. There are a large number of oxygen-containing groups on the surface of activated carbon, such as hydroxyl (-OH), carboxyl (-COOH), etc., which all have the function of electrostatic adsorption and produce chemical adsorption on Cr (VI). It can be completely used to treat Cr (VI) in electroplating wastewater, and the adsorbed wastewater can meet the national discharge standard. The results showed that when the mass concentration of Cr (VI) in the solution was 50mg/L, pH=3 and adsorption time was 1.5h, the adsorption performance and Cr (VI) removal rate of activated carbon reached the best effect. Therefore, the process of treating wastewater containing chromium by activated carbon is the result of the comprehensive action of physical adsorption, chemical adsorption and chemical reduction of Cr (VI) in solution by activated carbon. Activated carbon treatment of wastewater containing chromium has stable adsorption performance, high treatment efficiency, low operating cost, and certain social and economic benefits.activated carbon pellets wholesale  2. Treatment of cyanide-containing wastewater with sexual carbon. In industrial production, cyanide or by-product cyanide is used in the wet extraction of gold and silver, the production of chemical fiber, coking, synthesis of ammonia, electroplating, gas I production and other industries, so a certain amount of cyanide-containing wastewater must be discharged in the production process. Activated carbon has been used to purify wastewater for a long time and there are more and more reports on its application in the treatment of cyanide-containing wastewater. However, due to the small adsorption capacity of CN_ and HCN on activated carbon, which is generally 3mgCN/ GAC --8mgCN/ GAC depending on the variety, it is not cost-effective in the treatment cost. 3. Activated carbon treatment of wastewater containing mercury. Activated carbon has the ability to adsorb mercury and mercury-containing compounds, but its adsorption capacity is limited, and it is only suitable for treating wastewater with low mercury content. If the concentration of mercury is high, it can be treated by chemical precipitation method first. After treatment, the mercury content is about 1mg/L, and it can reach 2-3mg /L when high, and then further treatment with activated carbon. 
Ding Xinda activated carbon decomposition and degradation02021-12-13 22:47:02
2.1.3 Determination of ash content. Put 150mL porcelain cyanosis pot in muffle furnace, burn it at (65020) "℃ to constant weight, put the cyanosis pot in dryer, cool and weigh; Weigh 5 grams of the crushed sample (approximately 0.1mg) and place it in 150mL porcelain coating that has been burned to constant weight; Put Zengtan into a muffle furnace whose temperature does not exceed 300℃, open the cyanosis cap, and gradually increase the temperature to a constant weight at 650 ℃ 20℃. It takes about three hours. Calculate ash value and get ash content.activated carbon for gold recovery  2.1.4 Determination of methylene blue adsorption value. The crushed sample was weighed with 1.0 grams (approximately to 1mg) and placed in a 100mL grinding stopper conical flask. An appropriate amount of methylene blue test solution was added with an eyedrot. The filtrate was placed in a colorimetric dish with a light diameter of LCM, and the absorbance was measured with a spectrophotometer at a wavelength of 665nm. The absorbance was compared with the absorbance of the standard cupric sulfate filter. The number of ml of methylene blue test solution consumed was the methylene blue adsorption value of the sample. activated carbon wholesale 
Ding Xinda activated carbon nicotinamide and decomposition remember02021-11-10 00:03:01
Activated carbon has adsorption effect on gas or solute of some solution, and some are adsorbed on the surface of carbon, and some are adsorbed inside the structure of carbon. The size of the adsorption force is related to the total surface area of the activated carbon, the finer the carbon particles, the greater the total surface area, the stronger the adsorption force, and vice versa. The same fineness of activated carbon, the strength of its adsorption and the structure of the adsorbed material.activated charcoal powder  In general, all compounds with conjugate double bond structure, activated carbon is easy to adsorption, the more often double bond, activated carbon on its adsorption capacity is greater. This is mainly because activated carbon has a hexagonal structure formed by the combination of covalent bonds (with large bond structure properties of aromatic ring), which is easy to be mutual with common double bonds. Role. Some pigments, most of which have a strategic structure, are easy to be adsorbed on the carbon. In the process of recrystallization, activated carbon decolorization is added to remove impurities. This is the reason.www.activated-carbon-pellets.com  For the same skeleton compounds or the same type of compounds, the introduction of amine, hydroxyl, carboxyl and other polar groups will often increase the adsorption of activated carbon to it. The adsorption power of activated carbon on the material is related to the structure of the adsorbed material and the solvent used. The adsorption capacity is usually strongest in water, followed by ethanol and acetone, and weaker in other solvents. Therefore, the decolorization with activated carbon is the best in aqueous solution, followed by ethanol and acetone, and almost no decolorization ability in other organic solvents. The size of the adsorption force of activated carbon on the solute in the solution, in addition to the size of the activated carbon and the structure of the adsorbed matter, must also consider the interaction between solute and solvent, that is, must also consider the size of the solute solubility of the solvent. Activated carbon chromatography is often carried out in an aqueous solution, the solubility of the adsorbate in water when there is a key role in the adsorption capacity or adsorption stability. For example, the adsorption of activated carbon on iodine, flash iodine in the water towel solubility is minimum, so the adsorption of activated carbon in water is the largest. Another example of activated carbon on the adsorption of trans butadienoic acid is greater than cis butadienoic acid, the reason is that the solubility of trans butadienoic acid in water than cis butadienoic acid. 
Ding Xinda activated carbon purification and decomposition of specific surface area adsorption capacity0CLMnb2021-12-06 22:49:48
The preparation methods of activated carbon include physical method, chemical method, microwave radiation method, etc.(1) Physical method.activated carbon from china   Physical method is to use carbon dioxide, water vapor or the mixture of both as activator, the carbonized carbon material and gas in the activation furnace at 500~1200℃ for carbon activation reaction, so that the pore size of the carbonized material to expand, the formation of activated carbon with porous microcrystalline structure.Gas activation method mainly includes carbonization and activation engineering.The so-called carbonization, refers to the low temperature (about 500℃) is small, the volatile coal tar molecules in the material and the thermal decomposition and curing process of asphalt, that is, to remove the volatile in advance, made suitable for the next step of activation with carbonization.gold coconut shell activated carbon  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. 
Ding Xinda activated carbon raw material use02022-01-13 23:16:06
The maintenance sewage contains a large number of complex biodegradable substances, biodegradability is poor, for many years mainly rely on fresh water dilution treatment and combustion furnace treatment, but these two methods are low efficiency and high cost, so it is necessary to develop new wastewater treatment methods.www.chinactivecarbon.com   Although we have studied the upflow anaerobic sludge bed reactor (UASB) for the treatment of high concentration sewage of the natural gas purification plant, the start-up test results of 133 days show that the effluent COD removal rate is only about 40% when the influent COD is 6000mg/L, and the treatment effect is not good. Therefore, it is of practical significance to explore and seek an effective pretreatment method.gold adsorption on activated carbon  In this paper, Fenton oxidation and activated carbon adsorption were combined to pretreat the wastewater from natural gas purification maintenance, in order to improve the subsequent operation efficiency of UASB. This experiment by orthogonal test to determine the Fenton reagent oxidation first preliminary operating conditions, on this basis, carries on the single factor analysis method, the main factors influencing the Fenton reagent treatment effect for each study, investigation of its influence on wastewater COD removal rate, the results show that Fenton oxidation method the optimum operating conditions for natural gas purification overhaul wastewater treatment: HO2 dosing quantity 0.3 mol/L, n (HO)/n (Fe) = systematically, initial pH = 3, reaction temperature 70 ℃, reaction time, 40 min. Under these conditions, the COD removal rate reached 78.6%, the BOD /COD value increased from 0.168 to 0.353-0.403, and the biodegradability was greatly improved. If Ho is added in three times and the interval time is 10min, the COD removal rate will increase from 78.6% to 80.3%. Therefore, it can be seen that H0: batch addition will further improve the reaction effect. After Fenton oxidation treatment, wastewater and activated carbon adsorption, this topic activated carbon adsorption experiments using single factor method, examines different PH, activated carbon adsorption dosing quantity and the influence of adsorption time of wastewater COD removal rate, the results show that after Fenton oxidation treatment without having to adjust PH value, according to the 20 g/L after adding the activated carbon reaction 3 h at room temperature, COD removal rate was 47.3%,, BOD/COD value of 0.438 to 0.625. The research in this paper has laid a theoretical foundation and provided an experimental basis for the practical application of Fenton oxidation and activated carbon adsorption in the pretreatment of natural gas purification maintenance wastewater in UASB reactor. 
Ding Xinda activated carbon non-material transmission02021-11-26 19:35:41
By use.Generally there are three kinds. (1) gas phase adsorption of activated carbon.gold coconut shell activated carbon  Can be used for exhaust treatment, air purification, solvent recovery, gas separation, deodorization, desulfurization and denitration, industry.Raw material gas refining, gas chromatography filler, air sampler, fresh-keeping, ozone removal, cigarette filter nozzle, gas adsorption storage, military and civil gas masks, etc.(2) liquid phase adsorption of activated carbon.Tap water treatment, pure water manufacturing, industrial and domestic sewage advanced treatment, decolorization refining, blood purification, gold recovery, double capacitor electrode, pharmaceutical carbon, etc.(3) catalyst (catalyst) with activated carbon.activated carbon from china  Both can be directly used as a catalyst for this industrial process (such as phosgene synthesis, synthesis of vinyl acetate, etc.), more time activated carbon is used as a catalyst carrier (such as carrying precious metal pins, men, palladium, nails, gold made of pin carbon, palladium carbon catalyst, etc.).(1) solvent recovery.Such as recycling printing industry with xylene, toluene, benzene and other solvents;Recycling organic solvents such as ethanol, acetone, ester and ether from plastics and artificial leather industry;Recycling of hexanone in tape factory;Recycling of dichloromethane from resin processing plants, etc.(2) air purification.Such as electronic, pharmaceutical industry aseptic workshop air purification;Removal of ozone in the air of the copy room and computer room;The removal of foreign odor in the air of confined space;Odor removal from refrigerators, etc.(3) Nuclear and biochemical protection.Nuclear radiation, biological warfare agents, chemical warfare agents are weapons of mass destruction, activated carbon is loaded with a variety of chemical agents can effectively protect it Activated carbon or chemical-loaded activated carbon is often used as a key component of personal protective equipment in the presence of toxic gases in the civilian industry. During the SARS crisis in late 2002 and early 2003, special protective masks with activated carbon loaded with silver played a role in protecting health care workers. (4) deep purification treatment of tap water.Practice has proved that activated carbon is still has the best effect of the depth of water purification products, its dosage in recent | years show how multiple growth. There is evidence that the next five years will be a rapid growth period for white water purification in China, and the demand for carbon for water purification will be a blowout development.(5). Deep purification treatment of industrial wastewater. For example, the three-level decolorization of printing and dyeing wastewater, the removal of heavy metal ions from electroplating wastewater, the purification of papermaking wastewater and the removal of COD from petrochemical industrial wastewater to meet the discharge standards, activated carbon has been proved to be one of the most effective deep purification materials. 
Ding Xinda high quality decomposition02022-02-13 22:33:22
1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied. The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN). gold recovery from activated carbon  2. The removal rate of CEOZ slurry prepared with mixed dispersant (NAP +PAM+SBN) in the processing of K9 glass by MASJP was higher than that of other mixed dispersants.activated carbon china manufacturers   By comparing the processing effect of MASJP with and without mixed additives, it is found that the processing effect of MASJP with mixed additives (NAP +PAM+SBN) has higher surface quality, which can significantly reduce the interface area between the polished area and the unpolished surface and increase the smooth surface as much as possible.3. Combining online observation and single factor method, the formation process of the surface features of the polished area was studied. The experimental results showed that the surface morphology of the polished area showed a W-shaped bowl structure in the vertical jet machining, and an eccentric bowl structure in the crescent shape in the oblique jet machining.Compared with the abrasive water jet machining effect, it is found that the W shape and crescent shape characteristics of the polishing region of MASJP are relatively flat, the smooth surface is larger and the surface quality is higher. 4. When applying nozzle with different outlet shapes in MASJP, it is found that the fluid ejected from the cylindrical nozzle flows out along the direction of the jet and does not disperse. The processing area of the fan-shaped nozzle is large, the polishing area is approximately a rectangle, and the removal depth near the nozzle is larger.Hollow conical nozzle processing finished parts, the polishing area formed a hollow circle, the central part of the removal of less, the circumference of the removal of deep;The removal depth of the polishing area decreases gradually from the center to the circumference after the finished piece is processed by the solid conical nozzle. 5, the workpiece surface profile and material removal depth with the selection of polishing slurry composition changes.With the increase of abrasive concentration, the material removal depth increases, which is roughly in a proportional relationship.With the increase of abrasive particle size, the material removal depth also increases. 
Ding Xinda activated carbon carbon adsorption and carbon principle02021-11-29 22:41:57
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. gold coconut shell 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. 
Ding Xinda activated carbon use02021-12-13 00:44:20
2.1.3 Determination of ash content. Put 150mL porcelain cyanosis pot in muffle furnace, burn it at (65020) "℃ to constant weight, put the cyanosis pot in dryer, cool and weigh; Weigh 5 grams of the crushed sample (approximately 0.1mg) and place it in 150mL porcelain coating that has been burned to constant weight; Put Zengtan into a muffle furnace whose temperature does not exceed 300℃, open the cyanosis cap, and gradually increase the temperature to a constant weight at 650 ℃ 20℃. It takes about three hours. Calculate ash value and get ash content.activated carbon for gold recovery  2.1.4 Determination of methylene blue adsorption value. The crushed sample was weighed with 1.0 grams (approximately to 1mg) and placed in a 100mL grinding stopper conical flask. An appropriate amount of methylene blue test solution was added with an eyedrot. The filtrate was placed in a colorimetric dish with a light diameter of LCM, and the absorbance was measured with a spectrophotometer at a wavelength of 665nm. The absorbance was compared with the absorbance of the standard cupric sulfate filter. The number of ml of methylene blue test solution consumed was the methylene blue adsorption value of the sample. activated carbon wholesale  
Ding Xinda activated carbon use02021-12-22 00:10:48
High-quality granular activated carbon must have good adsorption performance and strength. Like powdery activated carbon, the adsorption performance of granular activated carbon depends largely on the characteristics of pore structure. The adsorption performance index can be analyzed and characterized by different methods, such as the decolorization performance of activated carbon expressed by methylene blue. Other performance indexes include iodine adsorption value, caramel decolorization rate, etc.activated carbon for gold recovery  The pore structure characteristics and specific surface area of activated carbon are usually obtained by measuring nitrogen adsorption isotherm at low temperature with adsorption apparatus.activated carbon wholesale  For the gas phase adsorption, the size of the gas molecules is usually less than 1. ONM, the use of microporous activated carbon; For liquid-phase decolorization refining, due to the large size of the liquid molecules, it is necessary to use activated carbon with developed mesopore. Activated carbon has a large specific surface area and a particularly developed micro-pore structure, which is the main reason for its strong adsorption capacity and large adsorption capacity. 

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