Removal of antimony (III) and cadmium (II) from aqueous solution using animal manure-derived hydrochars and pyrochars.
In this study, hydrochars and pyrochars prepared from animal manures were characterized and were used to remove Sb (III) and Cd (II) from aqueous solution. Fourier transform infrared spectroscopy (FTIR) analysis revealed the interaction between Cd (II) and CO and CO groups within biochars and between Sb (III) and CO, CO and OH groups, respectively. Additionally, the lower absolute value of zeta potential of biochar after loading Sb (III) and Cd (II) suggested the occurrence of surface complexation. Existing primarily in the form of Sb (OH)3, the maximum adsorption capacities (Qmax) for Sb (III) were lower than those for Cd (II). Due to the lower contents of surface polar functional groups and less negative surface charge, hydrochars exhibited lower Qmaxfor Sb (III) and Cd (II) than pyrochars. However, hydrochars in this study had higher sorption capacities for Cd (II) than most of plant-based pyrochars reported by other literature.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
Lanfang
L
Han
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Haoran
H
Sun
Coastal Plains Soil, Water, and Plant Research Center, Agricultural Research Service, U.S. Department of Agriculture, 2611 West Lucas Street, Florence, SC 29501, USA.
Kyoung S
KS
Ro
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: sunke@bnu.edu.cn.
Ke
K
Sun
Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam-Bornim, Germany.
Judy A
JA
Libra
Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
Baoshan
B
Xing
D000327:Adsorption; D000818:Animals; D000965:Antimony; D002104:Cadmium / Q000737:chemistry*; D008372:Manure; D017550:Spectroscopy, Fourier Transform Infrared
D008372:Manure; D002104:Cadmium; D000965:Antimony
Adsorption; Antimony; Cadmium; Hydrochar; Pyrochar