Cadmium and zinc removal from aqueous solutions by Bacillus jeotgali: pH, salinity and temperature effects.
Effects of pH, salinity and temperature on biosorption of Cd and Zn by bacteria Bacillus jeotgali strain U3 were evaluated in batch experiments. Traditional and Subsequent Addition Methods (SAM) were used to carry out the bioassays. Sorption of metals was higher when pH or temperature was increased, or when salinity was reduced. The Langmuir isotherm better fit the biosorption data for Cd, while the Freundlich model fitted better for Zn biosorption. A comparison with similar biosorbents suggested that Bacillus jeotgali strain U3 could be considered a good biosorbent for Cd and Zn recovery.
Green-Ruiz
Carlos
C
Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena s/n, Col. Centro, 82000 Mazatlán, Sin., Mexico. mailto:cgreen@ola.icmyl.unam.mx
Rodriguez-Tirado
Victor
V
Gomez-Gil
Bruno
B
D000327:Adsorption / Q000187:drug effects; D001407:Bacillus / Q000187:drug effects* / Q000378:metabolism*; D001673:Biodegradation, Environmental / Q000187:drug effects; D018533:Biomass; D002104:Cadmium / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D012965:Sodium Chloride / Q000494:pharmacology*; D012996:Solutions; D013696:Temperature; D013997:Time Factors; D015032:Zinc / Q000302:isolation & purification*
D012996:Solutions; D002104:Cadmium; D012965:Sodium Chloride; D015032:Zinc