This work describes sorption kinetics, isotherms, and mechanisms
of three types of commercially available graphene oxide powders for the removal of carbamazepine using wet chemical
techniques. Carbamazepine, an anticonvulsant widely used for
the treatment of epilepsy, was chosen as the primary target sorbate
(in addition to nine other EDCs) because it is one of the 11 most
frequently detected EDCs in water systems [1] and has a moderate
solubility (200 mg l1
) which allows studying a range of concentrations.
As a reference to other conventional and new carbonaceous
sorbents, the sorption rates and extents on commercial
graphene oxide powders are compared to granular activated
carbon (GAC), carboxyl-functionalized hollow multi-walled CNTs
(MWCNT-COOH), and similar carbonaceous sorbents reported in
the literature [31–33]. Compared to conventional activated carbon,
graphene may offer higher sorption capacities and faster equilibration
over a wide pH range, due to more homogeneous sites, less
pore diffusion, and rapid p–p interaction kinetics. Graphene’s
higher specific surface area (theoretical 2630 m2 g1 [34], but in
practice often
This work describes sorption kinetics, isotherms, and mechanismsof three types of commercially available graphene oxide powders for the removal of carbamazepine using wet chemicaltechniques. Carbamazepine, an anticonvulsant widely used forthe treatment of epilepsy, was chosen as the primary target sorbate(in addition to nine other EDCs) because it is one of the 11 mostfrequently detected EDCs in water systems [1] and has a moderatesolubility (200 mg l1) which allows studying a range of concentrations.As a reference to other conventional and new carbonaceoussorbents, the sorption rates and extents on commercialgraphene oxide powders are compared to granular activatedcarbon (GAC), carboxyl-functionalized hollow multi-walled CNTs(MWCNT-COOH), and similar carbonaceous sorbents reported inthe literature [31–33]. Compared to conventional activated carbon,graphene may offer higher sorption capacities and faster equilibrationover a wide pH range, due to more homogeneous sites, lesspore diffusion, and rapid p–p interaction kinetics. Graphene’shigher specific surface area (theoretical 2630 m2 g1 [34], but inpractice often <1000 m2 g1) compared to CNT may promotegraphene-based materials as a preferred carbonaceous sorbentfor interfacial organic contaminant reactions.2.
การแปล กรุณารอสักครู่..