Determination of degradation of radioactivity and its kinetics in aerobic composting.
In this study, the kinetics of disappearance of radioactivity in aerobic composting was investigated. For this purpose, compost materials were prepared by mixing sugar beet wastes, wine factory wastes (grape wastes), straw and biological treatment sludge in different amounts. While alpha-radioactivity was not initially detected in all composting materials, the composting materials had some beta-radioactivity. In the mixtures of sugar beet wastes--straw-biological treatment sludge (1), sugar beet wastes-wine factory wastes (grape wastes)-biological treatment sludge (II) and wine factory wastes (grape wastes)-biological treatment sludge (III), the beta-radioactivity reduced by 82%, 58%, 85% respectively of initial values after 52 d. The beta-radioactivity degradation in the composting process could be represented by first-order kinetics and reaction rate constants of mixtures of I, II and III were k = 0.0693 d(-1) (R2 - 0.84), k = 0.0453 d(-1) (R2 = 0.98), k = 0.0234 d(-1) (R2 = 0.97), respectively.
Ipek
Ubeyde
U
Department of Environmental Engineering, University of Firat, Elazig, Turkey. uipek@firat.edu.tr
Obek
Erdal
E
Akca
Lütfi
L
Arslan
E Işil
EI
Hasar
Halil
H
Dogru
Mahmut
M
Baykara
Oktay
O
D027461:Beta vulgaris; D001673:Biodegradation, Environmental; D001709:Biotechnology / Q000379:methods; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D011850:Radioactive Waste; D011851:Radioactivity; D011868:Radioisotopes; D012037:Refuse Disposal / Q000379:methods*
D011850:Radioactive Waste; D011868:Radioisotopes