非完整约束奇异广义力学系统的Poincare-Cartan积分

对受高阶微商非完整约束并用奇异Lagrange量描述的广义力学系统，基于广义Apell-Чqeraea约束条件，并考虑到系统的内在约束，导出了该非完整约束奇异广义力学系统的广义Poineare-Cartan积分不变量．并证明了该不变量与非完整约束奇异广义力学系统的广义正则方程等价．     

光孤子约束系统的量子场论

光孤子系统可用奇异Lagrange量描述,系统含Dirac约束.通常按对应原理写出系统对易关系和量子运动方程时,未计及约束.文中对该系统进行严格的Dirac括号量子化,给出了系统的对易关系和量子运动方程,还对系统进行了路径积分量子化,并根据量子水平的Noether定理,导出了系统在时空平移变换不变性下的量子能量和动量守恒.系统还具有相位变换下的不变性,相应导出了系统的粒子数守恒.     

PREPARATION AND CHARACTERIZATION OF POLYMER-BASED SPHERICAL ACTIVATED CARBONS

A series of spherical activated carbons(SACs)with different pore structures were prepared from chloromethylated polydivinylbenzene by ZnCl_2 activation.The effects of activation temperature and retention time on the yield and textural properties of the resulting SACs were studied.All the SACs are generated with high yield of above 65% and exhibit relatively high mesopore fraction(me%)of 35.7%-43.6% compared with conventional activated carbons.The sample zlc28 prepared at 800℃for 2 h has the largest BET s...     

乙烯吡啶树脂的合成及应用研究进展

本文综述了乙烯吡啶树脂的合成及其应用.     

氨基修饰超高交联树脂对没食子酸的吸附性能

以亲水性小分子有机酸没食子酸作为研究对象,研究了氨基修饰超高交联树脂对没食子酸的吸附行为和机理.结果表明,氨基修饰超高交联树脂WJN-10对没食子酸有较高的吸附容量和吸附作用力;π-π共轭作用是树脂WJN-10吸附没食子酸主要作用力;WJN-10吸附没食子酸是物理吸附主导;吸附速率主要受控于颗粒内扩散过程;WJN-10对没食子酸有较好的吸附-脱附性能.     

Adsorption studies of tannic acid by commercial ester resin XAD-7

<正>Tannic acid and its related compounds are known as refractory organic pollutants,and it can create serious problems for the environment.The adsorption and desorption studies of tannic acid on commercial resins XAD-7 and D-201 are performed,and all data indicates resin XAD-7 can be used as an effective adsorbent for removing tannic acid during water/wastewater treatment.Furthermore,adsorption thermodynamics studies indicate different adsorption mechanisms for TA on XAD-7 and D-201.FT-IR and solid state ~(13)C-NMR spectroscopy are used to explain the adsorption force between XAD-7 and TA.It suggests that hydrogen bonding is the main adsorption force for TA.Finally,XAD-7's adsorption capacity in the presence of different metal ions is investigated,which indicates that heavy metal ions in solutions can decrease the adsorption capacity for TA on ester resin XAD-7.     

弱碱性大孔吸附树脂对腐殖酸的吸附

研究了腐殖酸分子量对弱碱性大孔树脂吸附腐殖酸的影响, 阐明了溶液中小分子芳环化合物(苯酚)及盐含量对树脂吸附腐殖酸的影响机制. 结果表明, 树脂对低分子量腐殖酸的吸附效果要优于高分子量腐殖酸; 低浓度苯酚在溶液中可以促进树脂吸附腐殖酸, 但溶液中苯酚浓度过高会对树脂吸附腐殖酸产生抑制作用; 溶液中的盐对树脂吸附腐殖酸的影响取决于溶液的pH值.     

影响弱碱树脂交换容量的几个因素

本文探讨了以二甲胺为胺化剂，苯乙烯系弱碱阴树脂生产过程中，氯球的洗涤方式、膨胀剂的种类、胺化方法、温度等因素对树脂全交换容量及强碱基团交换容量的影响     

垃圾焚烧飞灰理化特性研究

应用能谱分析、灰熔点炉、XRD、压汞仪等仪器手段对国内外8种垃圾焚烧飞灰的成分、熔点、晶相结构、颗粒特性等物理化学性质进行了系统研究。研究表明,飞灰成分因为受原料、炉型、取样位置等因素影响而差异很大。由于飞灰的成分差异导致垃圾焚烧飞灰比煤灰更易于熔融,对熔融处理有利,这主要归因于飞灰中SiO2含量以及SiO2/Al2O3差异,熔点与SiO2含量存在正比关系；添加CaO实现助熔是有条件的,不同飞灰由于焚烧条件和飞灰成分不同导致晶相组成有一定差异；飞灰内部孔径主要分布于0.3 μm～1.5 μm范围内,飞灰的比表面积为20.5 m2/g。     

复合功能超高交联吸附树脂对氨基萘酚磺酸的静态吸附热力学及动力学特征

吸附动力学;复合功能超高交联吸附树脂对氨基萘酚磺酸的静态吸附热力学及动力学特征;颗粒内扩散;