Enhanced PAHs adsorption using iron-modified coal-based activated carbon via microwave radiation

Abstract

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Coconut-based activated carbon fibers for efficient adsorption of various organic dyes

“…With ever-increasing concerns on environmental pollutions and energy crisis, the feedstock of activated carbon bers has gradually turned from petroleum resources to biomass-based materials. 15,16 Biomass is a promising feedstock for the preparation of activated carbon bers because of its abundance, environmental friendliness, low cost and good renewability. In addition, using biomass as a feedstock also affords a facile route to tailor the pore structures of the activated carbon bers.…”

Competitive adsorption of naphthalene and phenanthrene on walnut shell based activated carbon and the verification via theoretical calculation

“…20,23,24 Previous studies revealed that the same adsorbent would perform a higher adsorption capacity for PHE than NAP. Ge et al 34 found that the adsorption amount of PAHs on Fe-modied AC followed the same order, and Xiao et al 18 reported similar behavior during the adsorption of NAP, PHE, and pyrene over AC in solution.…”

“…Hence, this is indicating that PHE has signicantly higher adsorptive affinity with hydrophobic groups on the surface of WAC surface, as well as more intense p-p interaction between p-electrons of PHE and benzene rings of WAC surface. 18,34,35 In summary, the inherent physicochemical advantages between PHE and WAC endow it with more competitive regardless of the type of adsorption system. So, since WAC preferential adsorption towards to PHE, this can explained that the adsorptive difference of the two PAHs in combination with Q e and Q cal values, of which PHE did not signicantly change, while NAP declined in both components.…”

Hydrothermal synthesis and microwave-assisted activation of starch-derived carbons as an effective adsorbent for naphthalene removal

“…Wide scans were conducted from 0 to 1000 eV with a pass energy of 50 eV. 3 2.3.4 Elemental analysis. Elemental analysis of carbon, hydrogen, nitrogen, and sulfur of HC and HMAC samples were performed using a Vario EL cube analyzer.…”

“…2 Naphthalene can be transported long distances in water then enriched in soil and living organisms, and is difficult to be effectively degraded by biodegradation because of its chemical stability. 3 Compared with various physicochemical methods for pollutant removal, adsorption is an effective method for the removal of naphthalene owing to its capability for efficiently adsorbing different kinds of contaminants and simplicity of design. 4 Researchers have developed a series of adsorbents for the removal of pollutants in liquid phase at present, such as modied ligno-cellulosic, 5 dry waste biolms, 6 dried biomass, 7 calcined oyster shells, 8 wheat straw 9 and persea based-activated carbon.…”