TY - JOUR
T1 - Pyrolysis of heavy metal contaminated biomass pre-treated with ferric salts : product characterisation and heavy metal deportment
AU - He, Jing
AU - Strezov, Vladimir
AU - Zhou, Xiaoteng
AU - Kumar, Ravinder
AU - Kan, Tao
PY - 2020
Y1 - 2020
N2 - The metal(loid)-enriched Avicennia marina biomass obtained from phytoremediation was impregnated with two ferric salts (FeCl3 and Fe(NO3)3) prior to pyrolysis at 300–700 ðC, aiming to study the influence on pyrolytic product properties and heavy metal(loid) deportment. Results showed that the impregnated ferric salts increased the fixed carbon content of biochars, hydrocarbon fractions in bio-oils, and the evolution of CO and H2 in gases. Cd in biomass could be effectively removed from the biomass by FeCl3 impregnation. During pyrolysis, the ferric salts enhanced the elemental recovery of As, Cr, Ni and Pb in the biochars and decreased their distribution in gases. Notably, the ferric salt pre-treatment inhibited the mobility and bio-availability of most elements in the biochars. This study indicated that ferric salt impregnation catalysed the pyrolysis process of metal(loid) contaminated biomass, enabled the operation temperature at 500–700 ðC with minimal environmental risks, providing a safe and value-added way to the phytoremediation-pyrolysis scheme.
AB - The metal(loid)-enriched Avicennia marina biomass obtained from phytoremediation was impregnated with two ferric salts (FeCl3 and Fe(NO3)3) prior to pyrolysis at 300–700 ðC, aiming to study the influence on pyrolytic product properties and heavy metal(loid) deportment. Results showed that the impregnated ferric salts increased the fixed carbon content of biochars, hydrocarbon fractions in bio-oils, and the evolution of CO and H2 in gases. Cd in biomass could be effectively removed from the biomass by FeCl3 impregnation. During pyrolysis, the ferric salts enhanced the elemental recovery of As, Cr, Ni and Pb in the biochars and decreased their distribution in gases. Notably, the ferric salt pre-treatment inhibited the mobility and bio-availability of most elements in the biochars. This study indicated that ferric salt impregnation catalysed the pyrolysis process of metal(loid) contaminated biomass, enabled the operation temperature at 500–700 ðC with minimal environmental risks, providing a safe and value-added way to the phytoremediation-pyrolysis scheme.
UR - https://hdl.handle.net/1959.7/uws:67996
U2 - 10.1016/j.biortech.2020.123641
DO - 10.1016/j.biortech.2020.123641
M3 - Article
SN - 0960-8524
VL - 313
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123641
ER -