By James F. Kwiatkowski
Offers topical study within the learn of activated carbon, along with subject matters comparable to the skin chemistry of activated carbons and as catalyst helps; thermal processing of activated carbons from agro-industrial wastes; activated carbon as a steel oxide help; and, extra.
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Lead is one of the toxic heavy metals and can cause some disease. An important problem about lead is that it can accumulate in the body and concentrated through food chain. It is a metabolic poison and enzyme inhibitor. Lead can be released in the environment through very different ways such as lead acid batteries; pulp and paper industries; petrochemicals, refineries, printing industries; pigments; photographic materials; manufacturing of explosives; ceramic, glass, paint, oil and metal industries; phosphate fertilizers; electronics and wood production; combustion of fossil fuels; forest fires; mining activities; and automobile emissions .
According to the results, the adsorption is exothermic and the bed temperature of 50 oC is suitable for adsorption. It is also observed that the adsorption performance of ACF with the surface area of 1700 m2 g-1 is higher than that with 1000 m2 g-1. The adsorption ability of ACF in the removal of VOCs has been compared with that of GAC, 5A zeolites and silica gel. In the same operational conditions, the adsorption ability of ACF is the highest compared with the other adsorbents. The used ACFsamples have been appropriately regenerated by DC electrical heating at 150 oC.
The different amounts of GAC have been used to evaluate its effect in the promotion of the biofilter efficiency. The columns have utilized the BTEX with this order: benzene, toluene, ethylbenzene, and o-xylene. They have found that each of BTEX compounds can be removed with the removal efficiency greater than 90%. GAC increases the removal efficiency and makes stable the operation conditions when a shock appears in the system by increasing the gas flow rate or BTEX concentration. The results show that compost is a suitable biofilteration media to remove BTEX from gas streams but its ability increases after mixing with relatively small amounts of GAC.