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Metal biosorption equilibria in a ternary system
Author(s) -
Chong K. H.,
Volesky B.
Publication year - 2000
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(19960320)49:6<629::aid-bit4>3.0.co;2-q
Subject(s) - ternary operation , biosorption , ternary numeral system , chemistry , copper , thermodynamics , metal , zinc , ascophyllum , metal ions in aqueous solution , aqueous solution , binary number , dissociation (chemistry) , sorption , binary system , inorganic chemistry , adsorption , algae , physics , organic chemistry , mathematics , botany , arithmetic , computer science , biology , programming language
Equilibrium metal uptake performance of a biosorbent prepared from Ascophyllum nodosum seaweed biomass was studied using aqueous solutions containing copper, cadmium, and zinc ions in binary and ternary mixtures. Triangular equilibrium diagrams can graphically represent all the ternary equilibrium sorption data. Application of the multicomponent Langmuir model to describe the three‐metal system revealed its nonideal characteristics, whereby the value of apparent dissociation constants for the respective metals differed for each system. This restricted the prediction of the ternary equilibria from the binary systems. However, some predictions of the ternary system behavior from the model were consistent with experimental data and with conclusions postulated from the three possible binary subsystems. © 1996 John Wiley & Sons, Inc.