What is the rate of activated carbon adsorption related to

It is related to the degree of porosity on the activated carbon particles, the more pores, the faster the adsorption rate.

The ratio of surface area to volume, the larger the ratio, the higher the efficiency of activated carbon per unit volume.

Effect of concentration on the adsorption efficiency of activated carbon: the time of different concentrations of 10 toluene permeate adsorbent has a linear relationship with the logarithm of the initial concentration. The adsorbate, i.e., the greater the initial concentration of the adsorbate.

The concentration of volatile organic compounds has a significant effect on the adsorption efficiency of activated carbon. In general, the higher the initial concentration of VOCs, the shorter the permeation time and saturation time of VOCs to activated carbon. The adsorption process of activated carbon on high-concentration VOCs belongs to physical adsorption, and the influence of chemical adsorption is basically not considered.

The adsorption effect mainly depends on the size and number of activated carbon pores; The adsorption process of low-concentration VOCs is chemical adsorption, and the adsorption effect mainly depends on the chemical properties of VOCs.

Factors influencing the adsorption of activated carbon

1. The concentration of organic matter in water. Most organic matter has a specific relationship between concentration and adsorption, and the adsorption capacity generally increases exponentially as the concentration increases.

2. Solution pH. Because activated carbon can adsorb hydrogen and oxygen ions in water, it affects the adsorption of other ions. The effect of activated carbon on adsorbing organic pollutants from water generally decreases with the increase of the pH value of the solution.

3. Activated carbon has a large surface area and strong adsorption, which plays the role of purifying water in the water purifier, and can adsorb all kinds of suspended impurities in the water, some soluble substances, etc., mainly magnesium ions and calcium ions.

Activated carbon adsorption refers to the adsorption of one or more substances in water by using the solid surface of activated carbon to achieve the purpose of purifying water quality. The adsorption capacity of activated carbon is related to the pore size and structure of activated carbon. In general, the smaller the particles, the faster the pore diffusion rate, and the stronger the adsorption capacity of activated carbon.

Adsorption capacity and adsorption speed are the main indicators to measure the adsorption process. The size of the adsorption capacity is measured by the adsorption capacity, and the adsorption rate refers to the amount adsorbed by the adsorbent per unit weight per unit time. In water treatment, the adsorption rate determines the contact time of the adsorbent with the effluent.

It is a kind of microcrystalline carbon material with developed internal pore structure, large specific surface area and strong adsorption capacity of activated carbon. There are a large number of micropores invisible to the naked eye in activated carbon materials, and the force of mutual adsorption between activated carbon molecules, although the molecular movement speed is affected by temperature and material, it is always in constant motion in the microenvironment.

Due to the mutual attraction force between molecules, when a molecule is captured by the inner pores of activated carbon into the pores of activated carbon, more molecules will be attracted until the pores of activated carbon are filled due to the mutual attraction between molecules.

Activated carbon is mainly divided into two categories of wood and coal from the material, and the shape can be divided into formed carbon and powder charcoal, no matter what material and shape of activated carbon, its adsorption principle is the same, but there are differences in application, each has its own strengths.

The adsorption principle of activated carbon is to use its own developed pore structure to adsorb harmful substances in water or air, so as to achieve the purpose of purification.

Activated carbon is made of raw materials containing carbon, mainly coal, wood chips, fruit shells, etc., after high-temperature carbonization and activation, activated carbon products with rich pore structure are formed. The adsorption performance of husk charcoal is better than that of coal-based charcoal, but it is also higher.

Coal charcoal is mostly used in waterworks and community treatment stations, and husk charcoal with higher performance is used in household water purifiers.

Formed charcoal (mainly granular carbon here) can be used for advanced treatment of water quality in community water purification stations, waterworks or household water purifiers. Powdered carbon is mainly used for water quality pretreatment or emergency treatment in waterworks where the water quality deteriorates seasonally, and the powdered carbon also has the ability to decolorize. In recent years, activated carbon fiber products have been developed, activated carbon fiber has more abundant micropores, adsorption capacity and adsorption speed are better than granular carbon, but the highest is very high, currently only used in a very small number of household water purifiers.

Activated carbon is a porous carbon-containing substance, it has a highly developed pore structure, and the porous structure of activated carbon provides a large amount of surface area for it, which can be fully in contact with gas (impurities), thus endowing activated carbon with unique adsorption properties, making it very easy to achieve the purpose of absorbing and collecting impurities. Just like magnetism, all molecules have a mutual gravitational pull towards each other. Because of this, the large number of molecules on the pore walls of activated carbon can create a strong gravitational pull, which can achieve the purpose of attracting harmful impurities into the pore size.

However, not all activated carbon can adsorb harmful gases, and the best adsorption effect can only be achieved when the pore structure of activated carbon is slightly larger than the diameter of harmful gas molecules, which can allow harmful gas molecules to enter completely (too large or too small). Polyurethane and polystyrene foam boards also have adsorption, but they are small enough to be ignored.

Activated carbon has a rich pore structure and a large surface area, so it has good adsorption. What I use at home is not activated carbon, but the Moqing stone of the goddess of Zhuhai, because this absorption is much stronger than activated carbon, and Tmall*** has it.

The adsorption principle of activated carbon is to use its own developed pore structure

The adsorption function is mainly due to the characteristics of molecular movement, because the molecules of the gas are always doing irregular microscopic movements, and the adsorption speed is related to the temperature, pressure, gas flow rate and gas concentration in the room. Because there are countless interconnected pores on the surface and inside of the activated carbon, there is an adsorption force field in the entire space of the pores, and the adsorbed molecules enter the pores and will be subjected to the adsorption force around the pores at the same time, so that the activated carbon has a strong adsorption capacity.

The absorption principle of activated carbon is that the pollutant molecules pass through the activated carbon and enter its pores, which can be regarded as being absorbed by the activated carbon, which belongs to the passive absorption type. However, due to the lack of the ability of activated carbon to attach pollutant molecules to its pores, there is still pollution that continues to escape from the pores back into the air, which can easily cause secondary pollution.

The pore diameter of Maya blue is between nanometers, similar to the diameter of polluting molecules, and it is not too empty or too narrow to avoid the situation that molecules escape or cannot be absorbed. Compared to activated carbon, Maya blue has smaller pores and a larger specific surface area, i.e., a greater adsorption capacity.

Activated carbon is a kind of porous carbon, with a very rich pore structure, with good adsorption characteristics, its adsorption is made by physical and chemical absorption, and its appearance is black. In addition to the main carbon, its composition also contains a small amount of hydrogen, nitrogen, oxygen, and its structure is similar to a hexagonal shape, due to the irregular hexagonal structure, it is determined that it is more than the body and high surface area characteristics, and each gram of activated carbon has a specific surface equivalent to 1000 square meters. According to the adsorption characteristics of activated carbon, activated carbon is mainly used to remove pollutants in water, decolorize, filter and purify liquids and gases, and is also used for air purification, exhaust gas, precious metals and refining.

With the development of science, the use of activated carbon is becoming more and more extensive, and with the country's attention to the ecological environment, activated carbon has also played an increasingly important role. Activated carbon has a strong "physical adsorption" and "chemical adsorption" effect, which can adsorb some organic compounds to achieve the removal effect, using this principle, we can quickly and effectively remove harmful substances, odors and pigments in the water quality of the aquarium, so that the water quality can be directly and rapidly improved.

Activated carbon can be used repeatedly, it is very troublesome, activated carbon adsorption to a certain extent will be saturated, will not be absorbed, need to be taken back to the original factory for activation can continue to use, some people will feel very troublesome to use Mayan basket instead, their properties are the same, with small hole adsorption effect, can remove formaldehyde and some harmful substances.

The main reason is that activated carbon has a well-developed pore structure, which can adsorb molecules in the air on the surface of activated carbon, so as to achieve the adsorption effect. I think the Bamboo Sea Goddess's Moqing Stone is more effective, and it has ion exchange power that can be broken down and absorbed.

Activated carbon adsorption is physical adsorption, which occurs due to the force generated by the proximity of molecules.

Relying on its own developed pore structure and surface area, activated carbon can be in contact with the surrounding air to a large extent, and passively adsorb some pollutants into its own pores, so the larger the surface of the activated carbon, the more developed the pore structure, the stronger the adsorption capacity.

1. The properties of activated carbon adsorbents: the larger the surface area, the stronger the adsorption capacity; Activated carbon is a non-polar molecule, which is easy to adsorb non-polar or very low polar adsorbents; The size of activated carbon adsorbent particles, the structure and distribution of pores, and the chemical properties of the surface also have a great influence on adsorption.

2. The properties of adsorbate: it depends on its solubility, surface free energy, polarity, size and unsaturation of adsorbate molecules, concentration of adherents, etc.

3. Wastewater pH value: activated carbon generally has a higher adsorption rate in acidic solution than in alkaline solution. The pH value will affect the state and solubility of the adsorbate in water, and thus affect the adsorption effect. Banquet.

4. Coexisting substances: When a variety of adsorbates coexist, the adsorption capacity of activated carbon for a certain adsorbate is worse than that of a certain adsorbate when only that kind of adsorbate is contained.

5. Temperature: Temperature has little effect on the adsorption of activated carbon.

Many people may not know what activated carbon is used for drying, such as renovating a new house and wanting to remove formaldehyde, you can use activated carbon for adsorption to eliminate these harmful objects. Today, I will introduce to you the relevant content about the performance of activated carbon adsorption and the factors that affect activated carbon adsorption!

Performance of activated carbon adsorption 1. When the pore size of activated carbon is the same, the capacity of their adsorption will increase, and the adsorbed isotherm will expand upward; When their surface area is the same and the pore size is decreasing, their adsorption will increase in the field of low concentrations.

2. When the polarity of the surface of activated carbon increases, the binding force between water and carbon will begin to increase, and when the effective adsorption capacity decreases, the adsorbed isotherm will expand to high concentration.

3. When the molecular weight of the adsorbate increases, the isotherm of the curvature adsorption will be compressed to the side with low buried concentration, and then further expanded to the side with high concentration.

What are the factors that affect the adsorption of activated carbon:

1. The properties of activated carbon.

Because the physical and chemical properties of activated carbon determine its adsorption effect, its properties are related to the material processing methods used in the manufacture of activated carbon, and the three most basic requirements of activated carbon are: the capacity of adsorption should be large, the speed of adsorption should be fast and the mechanical strength should be good.

2. The properties of adsorbents.

Because the solubility of activated carbon adsorption has a certain correlation with the solubility in the solvent, the order of activated carbon adsorption in water is increased in the order of A, B, C, D, and if the solubility is smaller, the easier it is for activated carbon to adsorb.

3. The influence of the pH value of the solution.

Because activated carbon adsorbs minerals and OH in water, but this will affect its adsorption of other ions, usually the lower the pH value, the better its adsorption effect will be, so in practical use, it is necessary to test the best pH value range.

4. The influence of solution temperature.

If the index of adsorption heat is larger, the greater the influence of temperature on adsorption, usually when using activated carbon to treat water, the influence of temperature on adsorption is not very large.

5. The effect of the coexistence of multi-component adsorbates.

When using adsorption to treat sewage, because the water contains more than one kind of pollutant substance, because of the different properties, it may promote each other or interfere with each other when adsorbing them. However, in most cases, the capacity of multiple groups of adsorption will be lower than that of a single group.

Soluble small molecules of colored substances, gases, partially insoluble organic compounds, etc.

Activated carbon can automatically adsorb toxic and harmful gases, smoke and odors for a long time around the clock.

The main substances that can adsorb in the air that are harmful to human health are:

Formaldehyde, benzene, toluene, xylene, ammonia, radon, chlorine, sulfur dioxide, methane, carbon monoxide, carbon dioxide.