The role of activated carbon in water treatment industry

Activated carbon is a substance which are frequently used in water treatment industry, can remove the smell and taste, colour, residual chlorine, colloidal and organic matter ( Synthetic detergents, pesticides, herbicides, pesticides, synthetic dyes, THMS, halide acetate, endocrine disruptors such as phthalic acid esters PAES) , heavy metals ( Such as cadmium, chromium, lead, mercury, silver, nickel, etc. ) , radioactive substances, etc. , is the earliest and most widely used in water purification water purification materials.

active carbon in the water treatment industry development prospects

the influencing factors of adsorption, adsorption capacity and adsorption speed are the main indicators to measure the adsorption process. The size of the adsorption capacity is measured by adsorption, the adsorption rate refers to the unit weight of adsorbent adsorption in unit time quality. In water treatment, sewage needs and adsorbent adsorption speed determines the contact time. Activated carbon adsorption ability is associated with the pore size and structure of activated carbon. In general, the smaller the particle, the faster the pore diffusion velocity, the stronger the adsorption ability of active carbon. Wastewater pH value and temperature also has effect on the adsorption of activated carbon. Activated carbon under acid condition in general than in alkaline conditions have higher adsorption capacity. Adsorption is usually exothermic reaction, so low temperature favors the adsorption reaction. Of course, activated carbon adsorption ability related to the sewage concentration. In a certain temperature, activated carbon adsorption quantity varies with the increase of concentration of adsorption material balance.

active carbon is a kind of special processing of carbon, with countless small porosity, large surface area, activated carbon surface area per gram is 500 - 1500m2。 Activated carbon has a strong physical adsorption and chemical adsorption function, but also has the detoxification. Detoxification is the use of its vast size, will poison adsorption in microporous activated carbon and thus prevent the absorption of poison. At the same time, the activated carbon can be combined with a variety of chemicals, so as to prevent the absorption of these substances. Activated carbon adsorption of activated carbon adsorption is the use of a solid surface of active carbon adsorption of one or more of the substance in water, in order to achieve the purpose of purifying water quality.

active carbon filter material is the most main, the most used water adsorption materials ( Other adsorption materials are: neutral macroporous resin and macroporous Yin resin, zeolite and diatomite, etc. ) 。 Activated carbon is made of coconut shells, fruit shell as raw material, through carbonization ( Burning furnace) , activation, In the column's activation furnace in 800 ℃ high temperature steam activation) Washing, drying, crushing, screening, air separation, etc. In the early 1930 s, people use activated carbon adsorption of phenol in waste water from coking plant, as a result, the application of activated carbon in water treatment has a history of nearly eighty years. Recorded in 1862 Britain using activated carbon to purify drinking water. Our country is also the earliest modern water purification activated carbon for water purification materials. Can say, since the birth of water purifiers, activated carbon has been linked to water purification 'inseparable', was tight.

activated carbon filter can remove the water smell and taste, colour, residual chlorine, colloid, organic matter ( Synthetic detergents, pesticides, herbicides, pesticides, synthetic dyes, THMS, halide acetate, endocrine disruptors such as phthalic acid esters PAES) , heavy metals ( Such as cadmium, chromium, lead, mercury, silver, nickel, etc. ) , radioactive substances, etc. , is the earliest and most widely used in water purification water purification materials. General activated carbon filter, not only in domestic reverse osmosis pure water, and most of the ultrafiltration, such as ceramic, KDF, UV water purifiers, will use the activated carbon. Activated carbon and KDF can remove residual chlorine in water, but KDF chlorine reaction and zinc ions ( Zn2 +) , excess zinc may lead to water, but not for chloride with activated carbon in addition to this kind of worry. Activated carbon in the activation process to form the various shapes of small hole, constitutes a huge surface area with adsorption, surface area, the greater the adsorption effect is better.