TY - JOUR
T1 - Characterization of trace level Au(III) binding to alfalfa biomass
(Medicago sativa) by GFAAS
AU - Gardea-Torresdey, JL
AU - Tiemann, KJ
AU - Parsons, JG
AU - Gamez Goytia, Gerardo
AU - Yacaman, MJ
PY - 2002/9
Y1 - 2002/9
N2 - Existing technologies for the extraction and recovery of gold include
cyanidation which uses toxic cyanide. Because of the potential health
threat created by many of these processes, an increasing need to develop
new safer technologies to extract and recover gold from aqueous solution
has arisen. Previous experiments have shown that gold(III) is adsorbed
by alfalfa biomass at high concentrations in an almost pH-independent
mariner. However, little data exist for the bio-adsorption of trace
levels of gold(III) by alfalfa biomass. Batch laboratory pH profile
experiments were performed at trace levels with native alfalfa biomass
using a 100 ppb gold(III) aqueous solution. The observed trend in the
binding by the alfalfa biomass was highest at pH 2-3 (approximate
to97%) and decreased to approximately 50% at pH 4.0 and 5.0. To
explore the effects of hard cations on the trace level gold(III)
binding, calcium, magnesium, and sodium cations were added to the
gold(III) solutions and binding ex
AB - Existing technologies for the extraction and recovery of gold include
cyanidation which uses toxic cyanide. Because of the potential health
threat created by many of these processes, an increasing need to develop
new safer technologies to extract and recover gold from aqueous solution
has arisen. Previous experiments have shown that gold(III) is adsorbed
by alfalfa biomass at high concentrations in an almost pH-independent
mariner. However, little data exist for the bio-adsorption of trace
levels of gold(III) by alfalfa biomass. Batch laboratory pH profile
experiments were performed at trace levels with native alfalfa biomass
using a 100 ppb gold(III) aqueous solution. The observed trend in the
binding by the alfalfa biomass was highest at pH 2-3 (approximate
to97%) and decreased to approximately 50% at pH 4.0 and 5.0. To
explore the effects of hard cations on the trace level gold(III)
binding, calcium, magnesium, and sodium cations were added to the
gold(III) solutions and binding ex
M3 - Article
SP - 313
EP - 323
JO - Advances in Environmental Research
JF - Advances in Environmental Research
SN - 1093-0191
ER -