title: [Biosorption of crystal violet and malachite green by Rhodotorula graminis Y-5].
abstract: With a shaker, this paper studied the characteristics of the biosorption of crystal violet and malachite green by Rhodotorula graminis Y-5 under different adsorption time, initial pH, and temperature, as well as the desorption and recycling use of the dyes. The biosorption of crystal violet and malachite green by R. graminis Y-5 had the peaks (93.8% and 87.7%, respectively) at pH 7.0, dye concentration 50 mg x L(-1), 150 r x min(-1), 30 degrees C, and lasting 10 hours. After desorption, the biosorption rate of crystal violet and malachite green by R. graminis was 85.5% and 78.5%, respectively, indicating that the biosorption of crystal violet and malachite green was reversible, and the recycling use of the dyes by R. graminis was quite good, i. e., the dyes were renewable and could be recycled. Biosorption could be the mechanism of the decolorization of the dyes. The dyes were mostly adsorbed on the R. graminis surface -OH. The adsorption process was fast, efficient, and reversible, suggesting that R. graminis had a high potential for waste water treatment.
authors.affiliation: College of Biology and Science, Sichuan Agricultural University, Ya' an 625014, Sichuan, China. hurrong2006103@126.com
authors.forename: Rong
authors.initials: R
authors.lastname: Hu
authors.forename: Jian-Bo
authors.initials: JB
authors.lastname: Huang
authors.forename: Zhou-Ping
authors.initials: ZP
authors.lastname: Yang
authors.forename: Zi-Zhang
authors.initials: ZZ
authors.lastname: Cheng
authors.forename: De-Jun
authors.initials: DJ
authors.lastname: Jing
authors.forename: Qian-Ming
authors.initials: QM
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D000891:Anti-Infective Agents, Local / Q000302:isolation & purification / Q000378:metabolism; D004396:Coloring Agents / Q000302:isolation & purification / Q000378:metabolism; D005840:Gentian Violet / Q000302:isolation & purification* / Q000378:metabolism; D012248:Rhodotorula / Q000378:metabolism* / Q000502:physiology; D012394:Rosaniline Dyes / Q000302:isolation & purification* / Q000378:metabolism; D014873:Water Pollutants / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D000891:Anti-Infective Agents, Local; D004396:Coloring Agents; D012394:Rosaniline Dyes; D014873:Water Pollutants; C005095:malachite green; D005840:Gentian Violet