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Adsorption Capacity of Coconut Shell Carbon for Organic Matter

Views: 2     Author: Site Editor     Publish Time: 2020-09-22      Origin: Site


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    The adsorption capacity of coconut shell activated carbon products for organic matter does not increase with the increase of temperature. On the contrary, the increase of temperature leads to the increase of energy of adsorbed molecules and the improvement of desorption performance of adsorbed molecules. It is not conducive to the adsorption of activated carbon products and reduces the adsorption capacity of coconut shell activated carbon products. The main reason is that the adsorption of organic matter by coconut shell activated carbon is mainly the physical adsorption of highly developed pore surface area, and the adsorption force is intermolecular. When the adsorbed molecules need to achieve some activation like chemical adsorption, adsorption is not required.

    Chemical activation of activated carbon: first impregnate with chemical substances such as phosphoric acid or potassium hydroxide, sodium hydroxide or zinc chloride, and then carbonize in the range of 450-900 ℃. It is considered that the carbonization / activation process is carried out simultaneously with chemical activation. In some cases, this technique may be problematic because, for example, trace residues of zinc may remain in the final product. However, the chemical activation of activated carbon is better than physical activation because the temperature required for activating the material is lower and the time required is shorter.

    Activated carbon filters are usually used to remove organic compounds from water and / or extract free chlorine from water to make water suitable for discharge or for manufacturing processes. Removing organics from drinking water, such as humic acid and fulvic acid, can prevent chlorine in water from reacting with acid to form trihalomethane, which is a known carcinogen. Coal based granular activated carbon which can be used for water treatment has the same effect as powdered activated carbon.

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