Drinking water and groundwater treatment of perfluoroalkyl acids (PFAAs) heavily relies on adsorption-based approaches using carbonaceous materials, such as granular activated carbon (GAC). Application GAC is restricted by its inefficiency to remove short-chain PFAAs that have prevalently emerged substitutes and/or metabolites long-chain polyfluoroalkyl substances (PFAS). Here, we synthesized r...

The objective of this research was to examine the heterogeneous catalytic decomposition of H(2)O(2) and 4-chlorophenol (4-CP) in the presence of activated carbons modified with chemical pretreatments. The decomposition of H(2)O(2) was suppressed significantly by the change of surface properties including the decreased pH(pzc) modified with oxidizing agent and the reduced active sites occupied b...

Background: Because of the growing population and increasing freshwater consumption, treatment reuse greywater have been widely considered. The application a new environmentally friendly method for synthetic real (RGW) is utmost importance. This study aimed to evaluate efficiency combination ozonation, biological activated carbon, ultrafiltration (O3 /BAC/UF) in removal chemical oxygen demand (...

The degradation of microcystin by adsorbed bacteria on GAC (granular active carbon) filter from a water treatment facility was investigated. Dominant bacteria isolated from GAC were indigenous microorganisms, Psuedomonas sp. and Flavobacterium sp. The direct exposure of dominant GAC bacteria to microcystins resulted in a significant reduction of microcystin levels in both shaking and static con...

An integrated fluidized bed bioreactor (iFBBR) was designed to incorporate an aerobic sponge FBBR (ASB-FBBR) into an anoxic granular activated carbon FBBR (GAC-FBBR). This iFBBR was operated with and without adding a new starch based flocculant (NSBF) to treat synthetic primary treated sewage effluent (PTSE). The NSBF contains starch based cationic flocculants and trace nutrients. The results i...

MECHANISM AND KINETICS OF THE REDUCTION OF NITRIC OXIDE BY GRANULAR ACTIVATED CARBON INDUCED BY PdO/Al2O3 IN THE PRESENCE OF O2 by Tian Sang NO x and particulate matter are the main environmental hazards found in Diesel exhaust. In order to explore a novel method to remove NO„ as well as particulate matter, we examined the catalytic reduction of NO x with solid carbonaceous materials as a surro...

AND YUEFENG F. XIE aloacetic acids (HAAs) and trihalomethanes (THMs) are the major disinfection by-products (DBPs) found in chlorinated drinking water. Nine species of HAAs are commonly found in chlorinated water: monochloroacetic acid (ClAA), monobromoacetic acid (BrAA), dichloroacetic acid (Cl2AA), bromochloroacetic acid (BrClAA), dibromoacetic acid (Br2AA), trichloroacetic acid (Cl3AA), brom...

Pharmaceutically active compounds (PhACs) widely present in urban wastewater effluents pose a threat to ecosystems the receiving aquatic environment. In this work, efficiency of granular activated carbon (GAC) - based catalytic processes, namely wet peroxide oxidation (CWPO), peroxymonosulfate (PMS/GAC) and peroxydisulfate (PDS/GAC) at ambient temperature pressure were studied for removal 22 Ph...

Granular activated carbon (GAC) adsorption has found wide application as a treatment process for the removal of natural organic matter, small compounds (e.g. pesticides), inorganic heavy metals), taste and odour in water over many years. During GAC operation, contaminants are adsorbed becomes progressively saturated time, requiring periodic regeneration media to restore its capacity. Chemical b...