Chemistry of fly ash and cyclone ash leachate from waste materials and effects of ash leachates on bacterial growth, nitrogen-transformation activity, and metal accumulation.
The effects of waste ash leachates on soil microorganism were evaluated along with a chemical characterization of ash leachates. Thirty fly ash samples and cyclone ash samples obtained from the incineration of municipal solid waste, plastic waste, and construction waste were used. Twenty-one and 22 samples inhibited N transformation activity of soil microorganism and growth of Bacillus subtilis, respectively. On the other hand, 11 and 18 samples stimulated bacterial activity and growth, respectively, at low concentrations. Generally, cyclone ash contained a smaller amount of toxic metals than fly ash. Our results suggest that cyclone ash can be further studied for reuse, perhaps as a soil amendment. Pb was found to be highly accumulated in B. subtilis cells, and should be carefully monitored when waste ash is reused in the environment.
Takeuchi
Mio
M
Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan. takeuchi-mio@aist.go.jp
Kawahata
Hodaka
H
Gupta
Lallan P
LP
Itouga
Misao
M
Sakakibara
Hitoshi
H
Ohta
Hidekazu
H
Komai
Takeshi
T
Ono
Yoshiro
Y
D001412:Bacillus subtilis / Q000254:growth & development / Q000378:metabolism; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D002244:Carbon / Q000737:chemistry*; D060729:Coal Ash; D003247:Conservation of Natural Resources; D015386:Hazardous Substances / Q000032:analysis / Q000378:metabolism; D017745:Incineration; D007854:Lead / Q000032:analysis / Q000378:metabolism; D008670:Metals / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D052638:Particulate Matter / Q000737:chemistry*; D012037:Refuse Disposal; D012988:Soil Microbiology; D014866:Waste Products / Q000032:analysis*
D060729:Coal Ash; D015386:Hazardous Substances; D008670:Metals; D052638:Particulate Matter; D014866:Waste Products; D007854:Lead; D002244:Carbon; D009584:Nitrogen