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...     

胺基修饰大孔树脂对腐殖酸的吸附研究

研究了腐殖酸在胺基修饰大孔树脂D-301上的吸附行为,并与胺基修饰超高交联树脂NDA-99和大孔非极性树脂XAD-4作对比,结果表明,带有弱碱性基团的大孔亲水性树脂D-301对腐殖酸的吸附效果优于XAD-4和NDA-99,这主要得益于D-301树脂大孔结构和表面胺基修饰.探讨了溶液pH值和重金属离子对D-301树脂吸附腐殖酸的影响,并对作用机理进行了初步探讨.     

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.     

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;     

微孔HAp-ZrO2生物复合材料的制备及成孔机制研究

本文主要对微孔型HAp基生物材料的制备工艺及成孔机制进行了初步研究.研究发现,经冷压成型、等静压成型后的坯体再用无压烧结可制得孔径不等的微孔型HAp-ZrO2复合材料.在成型压力、烧结温度及保温时间都相同的条件下,添加剂与纳米氧化锆含量越高复合材料的强度越低,但其最低弯曲强度也达到23MPa,大大高于已报道的多孔型材料.添加剂及纳米ZrO2的加入量是材料中孔径大小及孔隙率高低的关键因素,而成型方式、烧结温度及保温时间因素对其也有影响.     

废旧高分子材料在回转窑内热解的研究：热解终温对热解产物的影响

以废旧高分子材料—ＰＥ塑料,ＰＶＣ塑料和废轮胎为试验物料,在外热式回转窑内进行了一系列热解试验。考察了热解终温对热解产物的产率及产物特性的影响。随热解终温的提高,热解气体的产率上升而半焦的产率下降;ＰＥ和ＰＶＣ的热解焦油的产率下降,而废轮胎则相反。在试验温度范围内热解气体的平均热值有一最大值;ＰＶＣ在热解过程中Ｃｌ－ＨＣｌ的转化率为５２０％～５６０％;热解终温对焦油的ＣＨ原子比、热值及族分均有一定影响;热解终温对热解半焦的热值、Ｃ和Ｈ残余率以及半焦反应活性也有一定的影响     

具有阴阳离子插入行为的电容去离子电极设计

具有离子嵌入/脱嵌能力的离子插层型电容去离子(CDI)电极材料是一类具有很高比容量的新型CDI电极,可以有效改善传统碳材料电极离子存储容量有限、电极易腐蚀的缺点。本文以金属氧化物、过渡金属/碳/氮/碳氮化物(MXenes)、钠超离子导体(NASICON)型磷酸盐材料等为分类,综述了近几年具有代表性的基于离子嵌入/脱嵌的电极材料的设计及在CDI方面的应用,以期深入理解构效关系,开发出性能更强的电极材料。