TY - JOUR
T1 - The stability of butyltin compounds in a dredged heavily-contaminated sediment
AU - Saeki, Kazutoshi
AU - Nabeshima, Akiko
AU - Kunito, Takashi
AU - Oshima, Yuji
N1 - Funding Information:
The authors thank Assistant Prof. Y. Shimazaki, Kyushu University, for advising on this study. This research was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (subject number 16310060).
PY - 2007/6
Y1 - 2007/6
N2 - A treatment process for marine sediment heavily contaminated with tributyltin (TBT) was designed that included dehydrating, sunlight drying and dumping processes. The time course in butyltin (BTs) compounds, TBT, dibutyltin (DBT) and monobutyltin concentrations were investigated in the sediment treated under various conditions (light (UV, sunlight and light exclusion), moisture (air-drying and water saturation) and wetting and drying cycles). Significant changes in all the BT compound concentrations with time were not found regardless of the sediment conditions for light and moisture. The results indicated the high stabilities of TBT and DBT in the sediments versus light and moisture condition changes, probably taking place in the treatment process. It is also estimated that the BTs in the sediment are resistant to photo-degradation and biochemical degradation and their half lives are relatively long. In contrast, the decreases in the TBT and DBT were observed during the wetting and drying cycle treatment for the water saturated sediment both during exposure to sunlight and under a dark condition. This result suggested the hypothesis that the TBT degradation could be accelerated by the high microbial activity induced by the moisture changing treatments.
AB - A treatment process for marine sediment heavily contaminated with tributyltin (TBT) was designed that included dehydrating, sunlight drying and dumping processes. The time course in butyltin (BTs) compounds, TBT, dibutyltin (DBT) and monobutyltin concentrations were investigated in the sediment treated under various conditions (light (UV, sunlight and light exclusion), moisture (air-drying and water saturation) and wetting and drying cycles). Significant changes in all the BT compound concentrations with time were not found regardless of the sediment conditions for light and moisture. The results indicated the high stabilities of TBT and DBT in the sediments versus light and moisture condition changes, probably taking place in the treatment process. It is also estimated that the BTs in the sediment are resistant to photo-degradation and biochemical degradation and their half lives are relatively long. In contrast, the decreases in the TBT and DBT were observed during the wetting and drying cycle treatment for the water saturated sediment both during exposure to sunlight and under a dark condition. This result suggested the hypothesis that the TBT degradation could be accelerated by the high microbial activity induced by the moisture changing treatments.
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U2 - 10.1016/j.chemosphere.2007.01.074
DO - 10.1016/j.chemosphere.2007.01.074
M3 - Article
C2 - 17368724
AN - SCOPUS:34247188569
SN - 0045-6535
VL - 68
SP - 1114
EP - 1119
JO - Chemosphere
JF - Chemosphere
IS - 6
ER -
