The presence of perfluorooctanoic acid (PFOA) and perfluorooctanesulphonic (PFOS) in crops is an important consideration for food safety. soil organic matter (SOM) content may affect the adsorption potential PFOA PFOS water their subsequent uptake crops. To better understand these dynamics, lettuce were investigated using granular activated carbon (GAC)-treated soils with varying SOM content. G...

Large scale applications of microbial fuel cells (MFCs) have been severely hindered by several problems such as high internal resistance, low power output, expensive materials, and complicated configuration. To address these issues, a granular activated carbon based single chamber microbial fuel cell (GACB-SCMFC) has been designed using GAC-biocathodes without using any expensive materials for ...

The removal of four recalcitrant trace organic contaminants (TrOCs), namely carbamazepine, diclofenac, sulfamethoxazole and atrazine by laccase in an enzymatic membrane reactor (EMR) was studied. Laccases are not effective for degrading non-phenolic compounds; nevertheless, 22-55% removal of these four TrOCs was achieved by the laccase EMR. Addition of the redox-mediator syringaldehyde (SA) to ...

Biochar, a charcoal-like product of the incomplete combustion of organic materials, is an increasingly popular soil amendment designed to improve soil fertility. We investigated the possibility that biochar could promote direct interspecies electron transfer (DIET) in a manner similar to that previously reported for granular activated carbon (GAC). Although the biochars investigated were 1000 t...

The adsorption of three pharmaceuticals, namely, acetaminophen, diclofenac, and sulfamethoxazole onto granular activated carbon (GAC), was investigated. To study competitive adsorption, both dynamic and steady-state adsorption experiments were conducted by careful selection of pharmaceuticals with various affinities and molecular size. The effective diffusion coefficient of the adsorbate was in...

Granular activated carbon (GAC) was synthesized from Silver berry (Elaeagnus Angustifolia L.) seeds using zinc chloride as the activation agent. To optimize operating parameters, effects of time and temperature carbonization, impregnation ratio, heating rate on iodine number yield were studied. Optimized parameters ratio 1:1, carbonization 500 °C, 1 hour, 5 °C/min. The GAC under optimized condi...

the recovery and removal of the most organic acids in liquid solutions is usually treated with fixed-bed adsorption processes. among many adsorbents, granular activated carbon (gac) is used to remove organic pollutants such as benzoic acid (ba) from wastewaters conventionally. in this research, adsorption isotherm curves of ba onto gac at varying temperatures 25-60 °c are developed and the amou...

Removal of per- and polyfluoroalkyl substances (PFAS) from water sources is significant interest as many states have established limits. Three granular activated carbons (GACs) a clay-based adsorbent, Fluoro-sorb® 200 (FS200), were tested using rapid small scale column tests (RSSCTs) to compare relative performance the media for PFAS removal. FS200 effluent was below detection all except PFHxA ...

Granular activated carbon (GAC), in the presence of dilute aqueous hypochlorite solutions typical of those used in water treatment, was converted to a reagent capable of carrying out free-radical coupling reactions and other oxidations of dilute aqueous solutions of phenols. The products included biphenyls with chlorine and hydroxyl substitution (hydroxylated polychlorinated biphenyls). For exa...

Two mini-columns partially filled with granular activated carbon (GAC) and/or a natural zeolite, covered by a bacterial biofilm of Arthrobacter viscosus, were used in a continuous flow system to remove Cr (VI) from solutions with initial concentration of 70mg/l and a working pH ranging between 4.5 and 5.5. Three different set-up's were used: two columns in series filled GAC covered with a biofi...