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Study on the kinetics of hazardous pollutants adsorption and desorption by biomass: Mechanistic considerations
Author(s) -
Tsezos Marios,
Wang X.
Publication year - 1991
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280500408
Subject(s) - biosorption , desorption , chemistry , rhizopus arrhizus , kinetics , biomass (ecology) , adsorption , activated sludge , environmental chemistry , nuclear chemistry , chromatography , sorption , environmental engineering , organic chemistry , sewage treatment , environmental science , biology , ecology , physics , quantum mechanics , lipase , enzyme
The kinetics of biosorption and desorption of lindane, diazinon and 2‐chlorobiphenyl by inactive activated sludge and Rhizopus arrhizus biomass was studied. The effects of solution initial concentration, temperature and type of biomass on the observed biosorption and desorption rates were also examined. The results of the present work show that the biosorption rates are reasonably rapid, with equilibrium attained within 4 h by activated sludge and 1 h by R. arrhizus. The observed biosorption kinetics consist of a rapid initial stage followed by a slower second stage. The observed rate of organic pollutants biosorption by activated sludge during the first stage can be described by second order kinetics. The biosorption of lindane by both biomass types is reversible and the desorption process is rapid and could be described by zero order kinetics when activated sludge is used as adsorbent. The type of biomass can have a significant effect on the observed biosorption and desorption rates.