Customized heavy metal capture agent for iron hydroxide adsorbent

Customization of Iron Hydroxide Adsorbent

adsorbent regeneration

After a certain period of adsorption, the surface of the adsorbent will be covered by the adsorbate, causing a sharp decrease in adsorption capacity. At this time, the adsorbate needs to be desorbed to regenerate the adsorbent. There are several regeneration methods commonly used in industry, including the following:

1. Reduce stress. The adsorption process is related to the pressure of the gas phase. High pressure leads to fast adsorption and slow desorption. When the pressure decreases, the detachment phenomenon begins to become significant. So after the operating pressure is reduced, the adsorbed substance will detach from the adsorbent surface and return to the gas phase. Sometimes, in order to detach, vacuum pumping is even used. This pressure changing regeneration operation is widely used in pressure swing adsorption. If high-purity hydrogen is adsorbed and separated, it is first adsorbed at a pressure of 1.37-4.12 MPa, and then desorbed at atmospheric pressure, thus obtaining high-purity hydrogen and regenerating the adsorbent.

2. Raise the temperature. Adsorption is an exothermic process. From a thermodynamic perspective, it is known that a decrease in temperature is beneficial for adsorption, while an increase in temperature is beneficial for desorption. This is because the kinetic energy of molecules increases with temperature, making the molecules adsorbed on the solid surface unstable and difficult to be controlled by the molecular attraction of the adsorbent surface, which makes them more likely to escape into the gas phase. In industry, this principle is utilized to increase the temperature of the adsorbent, causing the adsorbate to desorb. The heating methods include: one is indirect heating using an inner coil tube; One is to use the hot vapor of the adsorbate to return to the bed for direct heating. The two methods can also be used in combination. Obviously, the heat transfer rate of the adsorption bed also determines the desorption rate.

3. Ventilation and blowing. Introduce the gas that the adsorbent does not adsorb or does not adsorb significantly into the adsorbent bed for purging, in order to reduce the partial pressure of adsorbate on the adsorbent and achieve desorption. When the amount of purging gas is constant, the amount of desorbed substances depends on the equilibrium relationship between the operating temperature and total pressure.

4. Replacement detachment. Introducing another fluid into the bed, when the adsorption of the fluid by the adsorbent is weaker than that of the adsorbate, the introduced fluid replaces and blows out the adsorbate, and this fluid is called a desorbent. The closer the adsorption performance of the desorbent and the adsorbate, the less amount of desorbent used. If the adsorbent introduced has a stronger adsorption degree than the adsorbate, it is purely displacement desorption, otherwise it also has a blowing effect. The stronger the ability of the adsorbent to be adsorbed, the more the adsorbate will desorb. This method of displacement desorption with desorption agents is particularly suitable for thermosensitive substances. Of course, when using displacement desorption, the desorption agent also needs to be desorbed.

Customization of Iron Hydroxide Adsorbent

Our product is a pure granular iron hydroxide produced in Germany. It complies with all quality standards of DIN EN 15029:2012 and is suitable for drinking water treatment, including strict heavy metal content standards. Our products comply with all specifications of NSF/ANSI Standard 61, which is the standard for drinking water treatment. Our ISO 9001 certified quality management system is your consistent guarantee of high product quality.

Where can it be used? Our adsorbent materials are used in the production of drinking water, wastewater, and process water. It is a product of arsenic adsorption in the production of drinking water.

The advantages of our adsorbent are clear at a glance: its adsorption performance is five times higher than that of similar products, with a shelf life of up to 5 years without the need for chemical storage or dosing. It can achieve a simple and low-cost system technology, and when used in conjunction with a fixed bed, the entire system does not require electricity and has flexible delivery capacity. It can be used according to needs and does not produce arsenic contaminated sludge and wastewater during the treatment process.

Having or limiting a channel, the body is configured to be connected to a humidity controlled environment, such that the first end of the channel is in selective fluid communication with the external environment, and the second end of the channel is in fluid communication with the humidity controlled environment; An adsorbent material located in the channel, wherein the channel and adsorbent material are configured such that an inlet fluid flowing from the first end through the channel to the second end can flow through the adsorbent material, and such that an outlet fluid flowing from the second end to the first end can flow through a majority of the adsorbent material through which the inlet fluid flows; The valve system is arranged at the head of the channel, or adjacent to the head of the channel, or in fluid communication with the head of the channel.