title: Removal of dyes from aqueous solutions using activated carbon prepared from rice husk residue.
abstract: The treatment of dye wastewater by activated carbon (AC) prepared from rice husk residue wastes was studied. Batch adsorption studies were conducted to investigate the effects of contact time, initial concentration (50-450 mg/L), pH (3-11) and temperature (30-70 °C) on the removal of methylene blue (MB), neutral red, and methyl orange. Kinetic investigation revealed that the adsorption of dyes followed pseudo-second-order kinetics. The results suggested that AC was effective to remove dyes, especially MB, from aqueous solutions. Desorption studies found that chemisorption by the adsorbent might be the major mode of dye removal. Fourier transform infrared results suggested that dye molecules were likely to combine with the O-H and P=OOH groups of AC.
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China E-mail: changweihu@scu.edu.cn *These two authors contributed equally.
authors.forename: Yaxin
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China E-mail: changweihu@scu.edu.cn *These two authors contributed equally.
authors.forename: Xian
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China E-mail: changweihu@scu.edu.cn *These two authors contributed equally.
authors.forename: Ruiguang
authors.initials: R
authors.lastname: Yang
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China E-mail: changweihu@scu.edu.cn *These two authors contributed equally.; These two authors contributed equally.
authors.forename: Guiying
authors.initials: G
authors.lastname: Li
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China E-mail: changweihu@scu.edu.cn *These two authors contributed equally.; These two authors contributed equally.
authors.forename: Changwei
authors.initials: C
authors.lastname: Hu
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry; D012275:Oryza / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D012996:Solutions; D014874:Water Pollutants, Chemical; D002606:Charcoal; D008751:Methylene Blue