[Denitrification using radiation-pretreated wheat straw as solid carbon source].
Wheat straw after radiation pretreatment was used as solid carbon source and biofilm support for denitrifying microorganisms. Denitrification performance of radiation-pretreated wheat straw was compared to that of wheat straw without radiation pretreatment. The results showed that the denitrification rate of radiation-pretreated wheat straw was about 20% higher than that of wheat straw without radiation pretreatment. When the initial nitrate concentration was 65.3 mg/L, the denitrification rate using wheat straw after 300 kGy radiation with gamma-ray could reach 0.087 mg/(g x h) and the nitrate removal efficiency was above 90%. Parts of these results were confirmed by the IR analysis and SEM observation of wheat straw surface structure.
Fan
Zhen-Xing
ZX
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China. dr.fanzx@gmail.com
Zhao
Xuan
X
Wang
Jian-Long
JL
D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000378:metabolism*; D003037:Cobalt Radioisotopes; D005374:Filtration; D009566:Nitrates / Q000302:isolation & purification* / Q000378:metabolism; D018547:Plant Stems / Q000737:chemistry / Q000528:radiation effects; D014908:Triticum / Q000737:chemistry / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis
D003037:Cobalt Radioisotopes; D009566:Nitrates; D002244:Carbon