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1、无忧无忧无忧无忧PPTPPTPPTPPT整理发布整理发布整理发布整理发布行业报告总结通用PPT模版报告人：报告时间：免费模板免费模板Adsorption characteristics of chitosan modified by chelating agents of a new generation1、Removal of Cu(II), Zn(II), Cd(II) and Pb(II) complexes with IDS (iminodisuccinic acid亚氨基二琥珀酸) and EDDS (ethylene diaminedisuccinic acid乙二胺二琥珀酸) f
2、rom the synthetic aqueous solutions through adsorption on chitosan (CS) contact time (1120 min), pH values (112), temperatures (2050 C) has been investigated. 3、The effect of CS modification by preparing the bead crosslinked by glutaraldehyde and epichlorhydrin was also tested.免费模板Adsorption charact
3、eristics of chitosan modified by chelating agents of a new generation这两种配体（亚氨基二琥珀酸和乙二胺二琥珀酸）属于两种新的氨基多羧基型氨羧络合物，与传统的EDTA相比较，有高的生物可降解性能。免费模板Adsorption characteristics of chitosan modified by chelating agents of a new generation在不同配体纯在下，用壳聚糖吸附重金属的研究很少，原因是溶液中的配体会阻碍重金属的回收。羧酸类物质不仅可以作为重金属离子的配体，而且还可以与壳聚糖的氨基相互
4、作用形成酰胺键。羧酸的COO与壳聚糖的氨基之间还有静电作用。与氨基相比，酰胺键与对金属的绑缚能力比较弱。另一方面，羧酸类物质的其他基团也可以作为金属离子的配体，从而影响重金属的吸附。Dorota KoodynskaChemical Engineering Journal 179 (2012) 3343免费模板Adsorption characteristics of chitosan modified by chelating agents of a new generation亮点:假设：IDS and EDDS, are connected with metal ions in the f
5、orm of the complexes like M(ids)2 and M(edds)2, where M(II) is Cu(II), Zn(II), Cd(II) and Pb(II) was made.the application of CS for heavy metal anionic complexes removal from synthetic aqueous solution was studied. Dorota KoodynskaChemical Engineering Journal 179 (2012) 3343免费模板壳聚糖的吸附性能与它的高疏水性能有关（羟基
6、、氨基、羧甲基），高密度的氨基和羧甲基使壳聚糖能与带负电的物质发生反应. 改变pH能调节壳聚糖的质子化和去质子化能力。pH 由1 到 6，是壳聚糖的氨基质子化的过程，随着pH增大，质子化程度从100% 降到 76% 。pH 高于8 ，壳聚糖完全去质子化，不能吸附重金属离子。Adsorption characteristics of chitosan modified by chelating agents of a new generation免费模板Fig.1 Effect of pH on the adsorption capacities of Cu(II), Zn(II), Cd(II
7、) and Pb(II) complexes with IDS and EDDS on CS Effect of pH and mechanism of adsorption免费模板免费模板 binding sites were not available免费模板the potential sorption mechanism：electrostatic interactionschemical interactions On the other hand, the steric effect makes it difficult for Cu(II)EDDS complexes to app
8、roach amino groups.免费模板Adsorption characteristics of chitosan modified by chelating agents of a new generation enlarge the space ，improving the accessibility of amino groups, which is very important for M(II) ions sorption. The imine bond in the GLA-cross-linked CS is also capable of adsorbing M(II)
9、 ions. GLA tends to cross-link CS bonding through the amino groups and EPI through the hydroxyl groups. the polymer hydrophobic character changes and diffusion of metal ions into the net becomes slower and therefore different for GLAand EPI.免费模板It can be due to the fact that in the presence of SO42
10、ions CS exhibits the highest swelling degree in comparison to the presence of Cl and NO3 ions as well as the lowest mechanical resistance. Therefore, only in the case of SO42 ions the increase of the adsorption effectiveness was observed.Adsorption characteristics of chitosan modified by chelating a
11、gents of a new generation免费模板免费模板亮点:The main goal of the investigation is to maximize the defluoridation capacity (DC) of chitosan beads (CB) by the substitution of functional groups such as organic acids onto hydroxyl groups and chelation of amine groups with Fe3+ ion(Fe-CCB). Natrayasamy Viswanath
12、an, S. MeenakshiJournal of Fluorine Chemistry 129 (2008) 503509Selective sorption of fluoride using Fe(III) loaded carboxylated chitosan beads免费模板Selective sorption of fluoride using Fe(III) loaded carboxylated chitosan beads免费模板 The pHzpc of CB is 7.88 where as for Fe-CCB it was shifted to 3.22 whi
13、chclearly indicates the occurrence of structural changes in Fe-CCB.Selective sorption of fluoride using Fe(III) loaded carboxylated chitosan beads免费模板Selective sorption of fluoride using Fe(III) loaded carboxylated chitosan beads免费模板免费模板Modified coconut shell fibers: A green and economical sorbent f
14、or the removal of anions from aqueous solutions亮点：The powder of green coconut shell (Coco nuscifera L.) was chemically modified and used to remove inorganic anions（ PO43, SO42 and NO3） from aqueous solution through batch process. The solid was modified with ammonium quaternary salt (2-hidroxypropylt
15、rimethyl ammonium chloride)免费模板400 mL of a 1% CaCO3. Then, the solid was washed thoroughly and dried in an oven at 60C for 2 h. The powder was chemically modified by adding 1.2 mL of a 5 M(NaOH, Vetec) per gram of bagasse, followed by rest for 1 h. About 1 mL of 3-chloride 2-hydroypropyltrimethylamm
16、onium chloride solution was added to the treated powder bagasse under room pressure in order to favor a stronger interaction between the reactants and the coconut bagasse. The abovementioned methodology was used to modify the surface of the adsorbent, by removing the lignocelluloses constituents.吸附剂
17、改性：免费模板季碱化反应步骤：免费模板免费模板免费模板Highlight:详细探讨了磷酸根和铬酸根吸附的行为。研究了铬酸根和磷酸根吸附中间产物的形态。并揭示了反应生成物与溶度积之间的关系。免费模板Hydrocalumite (Ca2AlClLDH) 的稳定性研究前2h内，Ca、Al、pH迅速上升。8hCa、Al含量分别为5.7和2.9pH为12。溶解过程导致Ca的释放和pH的上升。免费模板chromate and phosphate热力学免费模板沉淀物的结构分析24h后，水铝钙石结构完全小消失高的pH抑制了水铝钙石的溶解免费模板产品的相变化，不依赖于pH.铬酸根的吸附是与氯离子交换免费模板 K
18、sp-controlled removal process： 离子浓度积(CP)与Ksp比较 免费模板吸附机理：Obviously, it is supposed that both the dissolutionreprecipitation in P removal and anion exchange process in Cr (VI) removal were controlled by the Ksp of the product which has the lowest Ksp value among the possible precipitates.免费模板无忧无忧无忧无忧PPTPPTPPTPPT整理发布整理发布整理发布整理发布THANKSTHANKS免费模板无忧无忧无忧无忧PPTPPTPPTPPT整理发布整理发布整理发布整理发布此课件下载可自行编辑修改，供参考！此课件下载可自行编辑修改，供参考！感谢你的支持，我们会努力做得更好！感谢你的支持，我们会努力做得更好！
