检索结果-南通市图书馆

Solidification Efficiency and Mechanism of Conventional curing agents for Sewage Sludge Stabilization and Dewatering

引用

Journal of Harbin Institute of Technology(New Series) 2015年第6期22卷 1-10页

作者： Siliang Li Liangliang Wei Qingliang Zhao Lu Li School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China Longjiang Environmental Protection Group Co. LTD Harbin 150056 China

One of the challenges faced by sewage sludge treatment and disposal is its higher water content,and how to efficient dewater those hazardous materials properly is welcome in practice. This study stabilized the sewage sludge via the using of conventional curing agents and calcined aluminum salts,and the corresponding dewatering mechanisms and structural changes of the stabilized sludge were further comparable analyzed.Experimental results showed that wollastonite and kaolin exhibit a relative higher dewatering efficiency as compared to other conventional curing agents; however the releasing rate of heavy metals of Cu,Cr,Ni for kaolin solidification and Zn,Pb for wollastonite solidification is higher than the sludge samples solidified by other curing agents. For comparison,the sludge samples solidified by calcined aluminum salts (AS),calcium ash,Mg-based curing agent,tricalcium aluminate( C_3A) show a lower heavy metals leaching potential and unconfined compressive strength. In addition,the economic characteristics and local availability of AS,calcium ash,C_3A and CaO makes it have a broad prospect in extension and application. These findings are of great significance for stabilization and dewatering of sewage sludge.

关键词： sludge dewatering curing agents solidification/stabilization heavy metal leaching

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

The Influence of Aziridine on the Aging of Composite Solid Rocket Propellant

引用

Computer Aided Drafting,Design and Manufacturing 2008年第1期18卷 88-93页

作者： AMGED A. Ali School of Astronautics Beijing University of Aeronautics and Astronautics

Aging of a solid composite propellant containing HTPB/AP/AL was performed in order to validate the conformance of the accelerated aging data to the Arrhenius law. The main objective of the work was to examine the influence of the aziridine bonding agents family on the propellant aging. Aging of the prepared propellant samples was conducted as follows: 1. Four samples, one free of bonding agents, and three containing aziridine based bonding agents MAPO,HX-752, MAT4 were aged at 65°C. 2. Another four samples based on HX-752, MAT4 with different curing agents were aged at 65°C. The measured mechanical properties of the free bonding agent propellant samples were very far from the specifications and this illustrates the importance of the bonding agents in both the preparation and the aging phases.The prepared bonding agent 'MAT4' gave remarkable improvements of the mechanical properties comparing with HX-752 and MAPO. The aziridine bonding agents family inhibited the rate of decomposition of the propellant during the aging periods and supported the propellant matrix against decomposition at the elevate temperatures. Using of HMDI as curing agent gave slight better mechanical properties to the IPDI.

关键词： aging solid propellant bonding agents curing agents hydroxy terminated poly butadiene (HTPB) l,l(Phenyl Dicarbonyl) bis (2- Methyl Aziridine) (HX-752) Tries[l-(2-methyl) aziridinyl] phosphine oxide (MAPO) reaction product of 2.0 mole of MAPO 0.7mole of adipic acid 0.3 mole of tartaric acid (MAT4) hexamethylene diisocyanate. (HMDI) isophoron diisocyanate (IPDI)

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

Preparation and Evaluation of the Heavy-duty and Anti-wear Nano-ceramics Epoxy Coating

Preparation and Evaluation of the Heavy-duty and Anti-wear N...

引用

Fifth International Conference on Surface Engineering

作者： Weiwei Cong a Zhangjian Zhou b Shuxiang Song Changchun Ge c

Heavy-duty coating is largely demanded for equipment under heavy corrosive environment,such as marine,sea-flat et al.With the development of nanotechnology,nano-ceramic particles show great prospect to improve the anti-corrosion and anti-wear properties of epoxy coating.In the present work,several kinds of nano-ceramic powders such as SiC,TiO2 and Al2O3 were selected as fillers to improve the corrosion resistance and wear resistance of epoxy coating.These nano-ceramic powders were pretreated by chemical and physical methods to improve the combination with epoxy resin.The effects of the filler morphology,grain size,particle amount,dispersion homogeneity to the coating properties were investigated.Three kinds of coating,including filled in no nano-ceramic particles,filled in non-modified nano-ceramic particles and filled in modified nano-ceramic particles,were prepared and compared.In the early experiment,several dispersants were used to modify the nano-ceramic powders.We characterized the modified nano-ceramic particles through particle size analysis,TEM and FTIR and compared the dispersed results of different dispersant.Finally it revealed that γ-Aminopropyl-triethoxy silane played a outstanding role in improving the performance of the coating.Different kinds and different amount of curing agents were investigated to harden the epoxy mixture.According to this,different coatings were prepared,which compound of were detected through infrared spectroscopy and analysis.The effects of these parameters to the coating properties were studied.The elementary work proved that there was a proper amount of curing agent for the coating with definite amounts of other components to get a better performance.And properties of coating,including corrosion resistance,wear resistance and some mechanical properties were characterized to evaluation the effect of factors mentioned above on the coating.The results showed that the wear-ability and corrosion resistance of the coating can be improved significantly after meliorating the disp

关键词： nano-ceramic modification curing agents epoxy coating

来源： cnki会议评论

在线全文

cnki会议

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

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

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：