Hydrothermal conversion of urban food waste to chars for removal of textile dyes from contaminated waters. 2014

Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, Republic of Singapore.

Hydrothermal carbonization of urban food waste was carried out to prepare hydrochars for removal of Acridine Orange and Rhodamine 6G dyes from contaminated water. The chemical composition and microstructure properties of the synthesized hydrochars were investigated in details. Batch adsorption experiments revealed that hydrochars with lower degree of carbonization were more efficient in adsorption of dyes. Operational parameters such as pH and temperature had a strong influence on the dye uptake process. The adsorption equilibrium data showed excellent fit to the Langmuir isotherm. The pseudo-second-order kinetic model provided a better correlation for the experimental kinetic data in comparison to the pseudo-first-order kinetic model. Thermodynamic investigations suggested that dye adsorption onto hydrochars was spontaneous and endothermic. The mechanism of dye removal appears to be associated with physisorption. An artificial neural network (ANN)-based modelling was further carried out to predict the dye adsorption capacity of the hydrochars.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D002606 Charcoal An amorphous form of carbon prepared from the incomplete combustion of animal or vegetable matter, e.g., wood. The activated form of charcoal is used in the treatment of poisoning. (Grant & Hackh's Chemical Dictionary, 5th ed) Activated Charcoal,Actidose,Actidose-Aqua,Adsorba,Carbomix,Charbon,CharcoAid,CharcoCaps,Charcodote,Formocarbine,Insta-Char,Kohle-Compretten,Kohle-Hevert,Kohle-Pulvis,Kohle-Tabletten Boxo-Pharm,Liqui-Char,Norit,Ultracarbon,Charcoal, Activated
D005735 Garbage Discarded animal and vegetable matter from a kitchen or the refuse from food preparation. (From Random House College Dictionary, 1982) Garbages
D006358 Hot Temperature Presence of warmth or heat or a temperature notably higher than an accustomed norm. Heat,Hot Temperatures,Temperature, Hot,Temperatures, Hot
D000165 Acridine Orange A cationic cytochemical stain specific for cell nuclei, especially DNA. It is used as a supravital stain and in fluorescence cytochemistry. It may cause mutations in microorganisms. Tetramethyl Acridine Diamine,3,6-Bis(dimethylamino)acridine,Acridine Orange Base,Basic Orange 3RN,C.I. 46005,C.I. Basic Orange 14,Euchrysine,N,N,N',N'-Tetramethyl-3,6-Acridinediamine Hydrochloride,Rhoduline Orange,Acridine Diamine, Tetramethyl,Base, Acridine Orange,Diamine, Tetramethyl Acridine,Orange 3RN, Basic,Orange Base, Acridine,Orange, Acridine,Orange, Rhoduline
D000327 Adsorption The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily. Adsorptions
D012235 Rhodamines A family of 3,6-di(substituted-amino)-9-benzoate derivatives of xanthene that are used as dyes and as indicators for various metals; also used as fluorescent tracers in histochemistry. Rhodamine
D013783 Textile Industry The aggregate business enterprise of manufacturing textiles. (From Random House Unabridged Dictionary, 2d ed) Industry, Textile,Industries, Textile,Textile Industries
D013816 Thermodynamics A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed) Thermodynamic
D014874 Water Pollutants, Chemical Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water. Chemical Water Pollutants,Landfill Leachate,Leachate, Landfill,Pollutants, Chemical Water

Related Publications

Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
February 2022, Journal of hazardous materials,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
February 2020, Scientific reports,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
July 1983, Science (New York, N.Y.),
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
January 1974, Arhiv za higijenu rada i toksikologiju,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
November 2011, Chemosphere,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
November 2022, Environmental pollution (Barking, Essex : 1987),
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
November 2022, Bioresource technology,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
November 2021, Polymers,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
November 2002, Water research,
Ganesh K Parshetti, and Shamik Chowdhury, and Rajasekhar Balasubramanian
March 2024, Global challenges (Hoboken, NJ),
Copied contents to your clipboard!