Behavior of cadmium and lead contained in wood during the carbonization process.
The behavior of heavy metals in wood during its carbonization process was examined. Cadmium in wood samples was found to be volatile when the samples were carbonized at 600 degrees C or higher, which demonstrated that removal of cadmium was feasible. Meanwhile, lead was found to be barely volatile even if the wood samples were carbonized at 1,000 degrees C or higher, which demonstrated that lead was difficult to remove and recover. The possibility of removing/recovering lead contained in wood by energization was then examined. By examining the concentration of sulfuric acid used as an electrolyte as well as load voltage, approximately 10% of lead was found to be recoverable.
Junfen
Xiong
X
National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
Nakajima
Daisuke
D
Kuramochi
Hidetoshi
H
Ohata
Michio
M
Yoshizawa
Shuji
S
Hisamatsu
Shin
S
Ping
Nin
N
Kunming
Mao
M
Goto
Sumio
S
D002104:Cadmium / Q000032:analysis / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis / Q000737:chemistry*; D006358:Hot Temperature; D007854:Lead / Q000032:analysis / Q000737:chemistry*; D013464:Sulfuric Acids / Q000032:analysis / Q000737:chemistry; D014835:Volatilization; D014934:Wood / Q000737:chemistry*
D004785:Environmental Pollutants; D013464:Sulfuric Acids; D002104:Cadmium; D002606:Charcoal; D007854:Lead; D002244:Carbon; C033158:sulfuric acid