Practical treatment system for polluted sea water and soil by tributyltin

三丁基锡污染海水和土壤的实用处理系统

• 批准号: 16310060
• 负责人: JINNO Kenji
• 金额: $ 8.64万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16310060/
• 关键词: Tributyltin (TBT); Coagulant; Activated carbon infiltration; Risk of ecosystem; High pressure consolidation; Strip dredging; Degradation of dioxins; TBT degradation; 凝集材

In order to restore the deteriorated marine environment by Tributyltin (TBT), the integrated research was initiated by the group of "Practical treatment system for polluted sea water and soil by tributyltin" at the field and laboratory in 2004 and 2005. The roles of the group members were as follows : Kenji Jinno and Yoshinari Hiroshiro planed the entire scheme and the practical plant setup to separate the TBT contaminated sea water from the dredged marine sediment. The separation was successfully done by applying the coagulant named PSI-100,and then the series infiltration consisted of fiber sheet, sand and activated carbon. To release the treated water back to the sea nearby the plant, TBT concentration was carefully checked. It was confirmed that the proposed series of treatment plant was able to reduce the dissolved TBT with 1,200-1,450ng/L in the turbid water to 3ng/L which is admissible release level. Beside such establishment of the proposed system, the evaluation method for the … More cost performance was investigated. So far, it was shown that the optimal designing scheme for the proposed treatment system to remove TBT was applicable for the present treatment system and the optimal combination of the fiber sheet, sand and activated carbon for infiltration was determined considering the cost of materials.Yuji Oshima and Tsuneo Honjo carried out toxicity bioassay of TBT in nauplii, copepodite and adult stages of marine harpacticoid copepod, Tigriopus japonicus which shows different sensitivities to chemicals, and evaluated on practical use of this bioassay. In the bioassay, the toxicity of TBT was examined by observations of hatching ratio, survival in the each stage, fecundity, and sex ratio. The results suggested that the bioassay test has a potential to evaluate risk of chemicals in various life stages of this copepod less than 16 days.Kazutoshi SAEKI investigated the time-changes in butyltin compounds (BTs), dibutyltin (DBT) and monobutyltin (MBT) in the sediment treated with various conditions (light (UV, sunlight and light exclusion), moisture (air-drying and water saturation) and heated-drying at 40℃ for 12 hrs at every 7day) in order to evaluate the behavior of BTs compounds together with various changes of the sediment condition occurred in the process. Consequently, the dehydrating and sunlight drying treatments for the sediment were expected possibly to enhance the slight degradation of TBT in the sediment. However an attention is required for the expansion of the contamination to an ambient environment because these treatments could accelerate wind scattering of the sediment particles.Kouki Zen investigated the effect of cement-mixing and dehydration method (CMD) on the elusion control of heavy metals, tri-butyl tin (TBT) and tri-phenyl tin (TPT) in a contaminated marine bottom sediment. The elusions of both TBT and TPT are affected by the pH of pore water and they decrease as the pH comes to the neutrality. The use of low pH cement in the CMD has, therefore, an advantage to the elusion control of TBT and TPT from treated sediment.Akihide Tada and his colleagues from the commercial companies applied the strip dredging machine developed for the marine sediment digging. This device is able to vacuum up the surface sediment polluted by TBT or other toxic chemicals which are usually adsorbed on the surface organic soil. The excavated area in Nagasaki and Hakata bays extended approximately 700〜800m^2. It was demonstrated in these bays that only fine silty clay was dredged effectively resulting in the low remediation cost.Honda Katsuhisa investigated, in field examination, the detoxification of dioxins and organotin compounds in the precipitate and supernatant separated from the dredged marine sediment, and proposed that an addition of chemical agent such as iron oxide (Fe_3O_4) is useful for the detoxificating contaminants. About 5% addition of iron oxide per weight of precipitate degradated about 20% of dioxins burden in the sediment. About 5% addition of iron oxide per weight of precipitate or supernatant occurred adsorption and/or degradation of organotin compounds : TBT and TPT burdens declined, respectively, about 30% and 40%, which resulted in higher detoxification ratios of the contaminants than amounts of chemical additives.In conclusion, the conducted research entitled on "Practical treatment system for polluted sea water and soil by tributyltin" confirmed to be applicable for the polluted sea water and sediment by TBT and other toxic chemicals. The conventional plants are integrated to separate sea water and sediment through coagulations, infiltrations, cementing, degrading and the bio-assay monitoring schemes. Until now, there is little practical research on the polluted marine sediment except for the expensive and huge scale systems. The group members are confident that present research can highlight the silent but polluted marine sediment. Less

为了修复三丁基锡(TBT)造成的海洋环境恶化，2004年和2005年，“三丁基锡污染海水和土壤实用处理系统”课题组在野外和实验室开展了这项综合研究。小组成员的作用如下：津野健二和吉井裕郎策划了整个方案和实际的工厂设置，将TBT污染的海水与疏浚的海洋沉积物分离。采用PSI-100混凝剂成功地进行了分离，然后由纤维板、砂和活性碳组成的串联渗透。为了将处理后的水释放到工厂附近的海洋中，仔细检查了TBT的浓度。经验证，该系列污水处理厂能够将浑浊水中溶解的TBT(1,200~1,450 ng/L)降低到3 ng/L，达到允许的排放水平。除了上述建议体系的建立外，…的评估方法更多的性价比被考察。到目前为止，本文提出的去除TBT的处理系统的最优设计方案适用于目前的处理系统，并从材料成本的角度确定了纤维板、沙子和活性碳的最佳渗透组合。大岛雄司和本条忠雄对TBT在无节幼体、桡足类和成虫阶段的毒性进行了生物测定，并对该生物测定的实际应用进行了评价。在生物测定中，通过观察孵化率、各期存活率、繁殖力和性比来检测TBT的毒性。研究了不同条件(光照(紫外线、阳光和遮光)、水分(风干和水分饱和)和每隔7天40℃加热干燥12小时)下沉积物中丁基锡化合物、二丁基锡和单丁基锡的时间变化，以评价沉积物中丁基锡化合物的行为以及在此过程中沉积物条件的各种变化。因此，沉积物的脱水和日光干燥处理可能会增强沉积物中TBT的轻微降解。然而，由于这些处理方法可能会加速沉积物颗粒的风散散，因此需要注意污染向周围环境的扩展。Kouki Zen研究了水泥搅拌和脱水方法(CMD)对污染的海底沉积物中重金属、三丁基锡(TBT)和三苯基锡(TPT)的逃逸控制效果。TBT和TPT的淋洗均受孔隙水pH的影响，且随pH趋于中性而减小。因此，在CMD中使用低pH值水泥有利于控制处理后沉积物中TBT和TPT的逃逸。来自商业公司的Akiide Tada和他的同事们使用了为海洋沉积物挖掘而开发的条带挖泥机。该装置能够对被TBT或其他有毒化学物质污染的表层沉积物进行真空处理，这些有毒化学品通常吸附在表层有机土壤上。长崎和博田湾的开挖面积约为700~800m^2。在这些海湾中，只有细粉粘土被有效疏浚，修复成本较低。本田胜久在现场试验中研究了从疏浚的海洋沉积物中分离出来的沉淀物和上清液中二恶英和有机锡化合物的解毒，并提出添加氧化铁(Fe3O4)等化学试剂有助于污染物的解毒。每重沉淀物中添加约5%的氧化铁，可降解沉积物中约20%的二恶英负荷。每重量沉淀物或上清液中添加约5%的氧化铁对有机锡化合物发生吸附和/或降解：TBT和TPT的负荷分别下降了约30%和40%，导致污染物的解毒率高于化学添加剂的加入量。综上所述，本研究证实了《三丁基锡污染海水和土壤的实用处理系统》适用于TBT和其他有毒化学品污染的海水和沉积物。通过混凝、渗透、胶结、降解和生物测定监测方案，传统的植物被整合在一起，以分离海水和沉积物。到目前为止，除了价格昂贵、规模庞大的系统外，对污染海洋沉积物的实用化研究还很少。该小组成员相信，目前的研究可以突出无声但受到污染的海洋沉积物。较少

项目成果

Effects of tributyltin maternal and/or waterborne exposure on the embryonic development of the Manila clam, Ruditapes philippinarum

• DOI: 10.1016/j.chemosphere.2005.07.047
• 发表时间: 2006-05-01
• 期刊: CHEMOSPHERE
• 影响因子: 8.8
• 作者: Inoue, Suguru;Oshima, Yuji;Honjo, Tsuneo
• 通讯作者: Honjo, Tsuneo

Tributyltin contamination of the bivalves in coastal areas around northern kyushu, Japan.

日本九州北部沿海地区的双壳类受到三丁基锡污染。

• 期刊: Environmental Toxicology 2005 (accepted)
• 作者: Inoue S;Abe S;Oshima Y;Kai N;Honjo T.
• 通讯作者: Honjo T.