Evaluation of granular activated carbons for removal of methylisoborneol to below odor threshold concentration in drinking water

Effects of surface characteristics of activated carbon on the adsorption of 2-methylisobornel (MIB) and geosmin from natural water

“…For the parameters of BET surface area, total pore volume, iodine number and methylene blue number, although carbon B2 all has markedly higher values than W, its adsorption capacities for both MIB and geosmin are far lower than those of W, indicating that these indicators are not suitable parameters for evaluating the performance of activated carbons for the removals of MIB and geosmin from natural water. Among the five carbons selected, the bituminous-based carbons (carbon B1-B3) display inferior adsorption compared with fruit shell-based (carbon F) and wood-based (carbon W) carbon for adsorption of MIB and geosmin, which is contrary to the results of some other references [9,10]. So the origins of raw materials should not be a decisive factor in the adsorption of MIB and geosmin by carbons.…”

“…However, previous studies indicate that the adsorption efficiency of such contaminants is very dependent on the types of PAC [1,[6][7][8]. Some researchers have found that the ligniteand wood-based chemically activated carbons displayed inferior adsorption for MIB compared with bituminous-based carbons [9,10]. Unfortunately, the basis for the PAC selection has been empirical, and the carbon quality is typically evaluated by using iodine number, methylene blue number and specific surface area as the main criteria [11,12].…”

“…Unfortunately, the basis for the PAC selection has been empirical, and the carbon quality is typically evaluated by using iodine number, methylene blue number and specific surface area as the main criteria [11,12]. However, some researchers found that these parameters could not represent the carbon adsorption performance in the removal of MIB and geosmin [9].…”

Photocatalytic degradation of geosmin by Pd nanoparticle modified WO3 catalyst under simulated solar light

“…Previous study has shown that GSM is resistant to conventional water treatments such as coagulation, sedimentation and filtration, especially at low concentrations [11]. Adsorption using powdered activated carbon (PAC) or granular activated carbon (GAC) is commonly used for GSM removal [12,13]. However, it exhibits reduced efficiency in natural water due to competition for the adsorption sites by natural organic material (NOM), which can result in larger doses of adsorbent being required and increase the cost of construction and operation [9].…”

Cobalt and zinc removal from aqueous solution by chemically treated bentonite

“…Several solid materials can be employed as adsorbents. Activated carbon is considered an effective adsorbent because of its extensive porosity and large available surface area (Shawabkeh et al 2002;Chen et al 1997). However, the use of activated carbon as an adsorbent material for waste remediation in developing countries is a cost-challenging technique.…”