Activated Carbon for Water and Wastewater Treatment: by Ferhan Cecen, Ouml;zgür Aktas

By Ferhan Cecen, Ouml;zgür Aktas

This monograph offers complete assurance of applied sciences which combine adsorption and organic methods in water and wastewater therapy. The authors offer either an advent to the subject in addition to an in depth dialogue of theoretical and useful considerations.After a assessment of the fundamentals thinking about the chemistry, biology and expertise of built-in adsorption and organic elimination, they speak about the setup of pilot- and full-scale therapy amenities, protecting powdered in addition to granular activated carbon. They elucidate the standards that effect the profitable operation of built-in structures. Their dialogue on built-in platforms expands from the results of environmental to the elimination of assorted pollution, to regeneration of activated carbon, and to the research of such structures in mathematical phrases. The authors finish with a glance at destiny wishes for examine and develoment.A really helpful source for environmental engineers, environmental and water chemists, in addition to execs operating in water and wastewater remedy.

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Additional resources for Activated Carbon for Water and Wastewater Treatment: Integration of Adsorption and Biological Treatment

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The sizes of micropores are usually comparable to those of adsorbate molecules. All atoms or molecules of the adsorbent can interact with the adsorbate species. This is the fundamental difference between adsorption in micropores and larger pores like meso- and macropores. Consequently, adsorption in micropores is essentially a pore-filling process. Therefore, volume is the main controlling parameter for adsorption in micropores [14]. Considering also that most of the total surface area is found in the micropores and the contribution of macropores to the total surface area is very low, the contribution of micropores to adsorption would be expected to be higher.

Concerns about the presence of Synthetic Organic Compounds (SOC) arose in 1960s. Beginning in the 1970s it was recognized that disinfection of water with chlorine gas or chlorine-containing compounds led to the generation of organic compounds, collectively termed Disinfection By-Products (DBPs), which were suspected of having adverse effects on health [7]. In this regard, Natural Organic Matter (NOM) constitutes the key group of organics acting as precursors for DBP formation. It was also shown that pretreatment of water with ozone led to inorganic hazardous by-products such as bromates.

Oxygenating the carbon surface decreases its affinity for simple aromatic compounds in the case of chemical activation. Extensive oxidation of carbon surfaces leads to a large decrease in the adsorbed amounts of phenol, nitrobenzene, c02 8 July 2011; 14:22:27 | 21 22 | 2 Fundamentals of Adsorption onto Activated Carbon in Water and Wastewater Treatment benzene, and benzenesulfonate [20]. The formation of functional groups is dependent on activation temperature. For example, phenolic and lactone functional groups appear at activation temperatures up to 4001C [11].

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