Granular activated carbon (GAC) is added to methanogenic digesters to enhance conversion of wastes to methane, but the mechanism(s) for GAC’s stimulatory effect are poorly understood. GAC has high electrical conductivity and thus it was hypothesized that one mechanism for GAC stimulation of methanogenesis might be to facilitate direct interspecies electron transfer (DIET) between bacteria and m...

The objective of this research was to determine the effectiveness of using pecan and almond shell-based granular activated carbons (GACs) in the adsorption of volatile organic compounds (VOCs) of health concern and known toxic compounds (such as bromo-dichloromethane, benzene, carbon tetrachloride, 1,1,1-trichloromethane, chloroform, and 1,1-dichloromethane) compared to the adsorption efficienc...

While Malaysia produces about half of the world’s palm oil and is largest producer exporter worldwide, industries generate large amounts lignocellulosic biomass waste as a sub-product with no economic market value other than feedstock for energy valorisation. With aim to increase sustainability sector, in this work we prepare new materials CO2 capture from residues (empty fruit bunches kernels)...

Abstract Because of the remarkable chemical structure perfluoroalkyl and polyfluoroalkyl substances (PFAS), as well complex conditions water, selecting an appropriate adsorbent for treating PFAS is critical. Adsorption needs to be environmentally friendly, low cost, consider types adsorbents that work in mixed solutions. In present study, we used estimate activity. This research aimed evaluate ...

This work aims to shed light on the scale-up a combined electrokinetic soil flushing process (EKSF) with permeable reactive barriers (PRB) for treatment of spiked clopyralid. To do this, remediation tests at lab (3.45 L), bench (175 L) and pilot (1400 scales have been carried out. The PRB selected was made merged particles zero valent iron (ZVI) granular activated carbon (GAC). Results show tha...

Two Pelargonium 1-aminocyclopropane-1-carboxylate (ACC) synthase cDNAs (GAC-1 and GAC-2) were identified and characterized. GAC-1 is 1934 bp long with a 1446-bp open reading frame encoding a 54.1-kD polypeptide. GAC-2 is a 1170-bp-long ACC synthase polymerase chain reaction fragment encoding 390 amino acids. Expression of GAC-1 and GAC-2 together with a previously identified ACC oxidase (GEFE-1...

A predictive isotherm model was developed to evaluate the extent of bioregeneration of granular activated carbon loaded with phenol and 2,4-dichlorophenol (2,4-DCP). Two basic substrates (116 mg/L of phenol and 100 g/L 2,4-DCP) as single solute were prepared. The mixture of them was provided to bisolute system for assessing the competitive adsorption. The effect of by-products, which were gener...

In this work, equilibrium and dynamic adsorption tests of cadmium Cd (II) on activated carbons derived from different oxidation treatments (with either HNO₃, H₂O₂, or NaOCl, corresponding to GACoxN, GACoxP, and GACoxCl samples) are presented. The oxidation treatments determined an increase in the surface functional groups (mainly the acidic ones) and a decrease in the pHPZC (except for the GACo...

Generalized arc consistency (GAC) is the most widely used local consistency in constraint programming. Several GAC algorithms for specific constraints, as well as generic algorithms that can be used on any constraint, have been proposed in the literature. Stronger local consistencies than GAC have also been studied but algorithms for such consistencies are generally considered too expensive. In...