检索结果-南通市图书馆

Effect of chemical and thermal activations on the properties of rice husk ash-based solidified wastes

Journal of Environmental Sciences 2010年第12期22卷 1993-1998页

作者： Nipon Tanpaiboonkul suwimol asavapisit Wichai Sungwornpatansakul Division of Environmental Technology School of Energy Environment and MaterialsKing Mongkut's University of Technology Thonburi National Center of Excellence for Environmental and Hazardous Waste Management Department of Environmental EngineeringKing Mongkut's University of Technology Thonburi Department of Civil Engineering Faculty of EngineeringKing Mongkut's University of Technology Thonburi

Strength development, leachability and microstructure of heavy metals from the solidified waste using synthesis rice husk ash （sRHA） and lime blended at the weight ratio of 1：1 were used as binders. The heavy metal-containing sludge was used at the level of 0 wt.%, 30 wt.%, and 50 wt.% dry weight, respectively. The sample specimens with and without 1.5 wt.% of sodium silicate （SiO2/Na2O = 1.0） were cured under the ambient condition and elevated temperature curing at 50℃ for 24 hr. Experimental results showed that the introduction of sodium silicate solution and elevated temperature curing to sRHA-based solidified waste containing 30 wt.% of heavy metal sludge gave one day strength of 20 kg/cme compared to 0.9 kg/cm^2 for the control sample. XRD patterns indicated that most metal-sulfides present in the sludge were appeared in the solidified waste and SEM coupled with EDX techniques reveal these metal-sulfide particles were trapped within the lime-sRHA matrices. In addition, cumulative leaching behavior by tank test （EA NEN 7375：2004） showed that solidified waste containing up to 30 wt.% of heavy metal sludge was suitable to dispose in a secured landfill.

关键词： rice husk ash heavy metals sodium silicate strength leaching microstructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Alterations of organ histopathology and metallolhionein mRNA expression in silver barb,Puntius gonionotus during subchronic cadmium exposure

引用

Journal of Environmental Sciences 2007年第11期19卷 1341-1348页

作者： Alisa Wangsongsak suwimol Utampongsa Maleeya Kruatrachue Mathurose Ponglikitmongkol Prayad Pokethitiyook Thitinun Sumranwanich Departments of Biology Faculty of ScienceMahidol UniversityBangkok 10400Thailand Departments of Biology Faculty of ScienceMahidol UniversityBangkok 10400Thailand.Department of BiologyFaculty of ScienceMahidol University International CollegeMahidol UniversityBangkok 10400Thailand Department of Biochemistry Faculty of ScienceMahidol UniversityBangkok 10400Thailand

Common silver barb, Puntius gonionotus, exposed to the nominal concentration of 0.06 mg/L Cd for 60 d, were assessed for histopathological alterations （gills, liver and kidney）, metal accumulation, and metallothionein （MT） mRNA expression. Fish exhibited pathological symptoms such as hypertrophy and hyperplasia of primary and secondary gill lamellae, vacuolization in hepatocytes, and prominent tubular and glomerular damage in the kidney. In addition, kidney accumulated the highest content of cadmium, more than gills and liver. Expression of MT mRNA was increased in both liver and kidney of treated fish. Hepatic MT levels remained high after fish were removed to Cd-free water. In contrast, MT expression in kidney was peaked after 28 d of treatment and drastically dropped when fish were removed to Cd-free water. The high concentrations of Cd in hepatic tissues indicated an accumulation site or permanent damage on this tissue.

关键词： cadmium Puntius gonionotus histopathology metallothionein mRNA

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：