期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 82, 期 4, 页码 389-398出版社
WILEY
DOI: 10.1002/jctb.1682
关键词
Panus fulvus; mycelial biomass; PBHB; isotherm; kinetics; desorption
Procion Blue H-B (PBHB) was used as a model reactive dye for biosorption studies onto inactive/dead mycelial biomass of Panus fulvus. Process parameters like pH, contact time and temperature were optimized. pH 2, 150 min of contact time and 35 degrees C were found to be more favorable for maximum biosorption. Various two- and three-parameter isotherms were employed to understand the biosorption process. Among the various two-parameter isothermal models applied, the Langmuir isotherm showed the best fit and among the three-parameter isothermal models, the Khan, Redlich-Peterson, Sips and Toth isotherm models showed similar fits and only the Koble-Corrigan model showed a poor fit. In kinetic studies, pseudo-first-order model fitted better than pseudo-second-order model. Maximum desorption was observed in alkaline pH, which reveals the possibility of a chemisorption mechanism involved in the removal of PBHB. Among the various desorption media assessed, 70% (v/v) acetone showed complete desorption of the sorbate from the sorbent. Scanning electron microscopy images revealed the non-fibrous nature of the adsorbent. FT-IR studies showed the existence of amine groups in the sorbent which are the major adsorbent sites for reactive dyes. (c) 2007 Society of Chemical Industry.
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