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1、文獻報告報告人：報告時間：1優(yōu)選課資2優(yōu)選課資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亞氨基二琥珀酸)and EDDS(ethylene diaminedisuccinic acid乙二胺二琥珀酸)from the synthetic aqueous solutions through adsorpt
2、ion 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.3優(yōu)選課資Adsorption characteristics of chitosan modified by chelating agents of a new
3、generation這兩種配體（亞氨基二琥珀酸和乙二胺二琥珀酸）屬于兩種新的氨基多羧基型氨羧絡(luò)合物，與傳統(tǒng)的EDTA相比較，有高的生物可降解性能。4優(yōu)選課資Adsorption characteristics of chitosan modified by chelating agents of a new generation在不同配體純在下，用殼聚糖吸附重金屬的研究很少，原因是溶液中的配體會阻礙重金屬的回收。羧酸類物質(zhì)不僅可以作為重金屬離子的配體，而且還可以與殼聚糖的氨基相互作用形成酰胺鍵。羧酸的COO與殼聚糖的氨基之間還有靜電作用。與氨基相比，酰胺鍵與對金屬的綁縛能力比較弱。另一方面，羧
4、酸類物質(zhì)的其他基團也可以作為金屬離子的配體，從而影響重金屬的吸附。Dorota KoodynskaChemical Engineering Journal 179(2012)33435優(yōu)選課資Adsorption characteristics of chitosan modified by chelating agents of a new generation亮點:假設(shè)：IDS and EDDS,are connected with metal ions in the form of the complexes like M(ids)2 and M(edds)2,where M(II)is
5、 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)33436優(yōu)選課資殼聚糖的吸附性能與它的高疏水性能有關(guān)（羥基、氨基、羧甲基），高密度的氨基和羧甲基使殼聚糖能與帶負電的物質(zhì)發(fā)生反應(yīng).改變pH能調(diào)節(jié)殼聚糖的質(zhì)子化和去質(zhì)子化能力。pH 由1 到 6，
6、是殼聚糖的氨基質(zhì)子化的過程，隨著pH增大，質(zhì)子化程度從100%降到 76%。pH 高于8，殼聚糖完全去質(zhì)子化，不能吸附重金屬離子。Adsorption characteristics of chitosan modified by chelating agents of a new generation7優(yōu)選課資Fig.1 Effect of pH on the adsorption capacities of Cu(II),Zn(II),Cd(II)and Pb(II)complexes with IDS and EDDS on CS Effect of pH and mechanism o
7、f adsorption8優(yōu)選課資9優(yōu)選課資 binding sites were not available10優(yōu)選課資the potential sorption mechanism：electrostatic interactionschemical interactions On the other hand,the steric effect makes it difficult for Cu(II)EDDS complexes to approach amino groups.11優(yōu)選課資Adsorption characteristics of chitosan modified
8、 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)ions.GLA tends to cross-link CS bonding through the amino groups and EPI t
9、hrough the hydroxyl groups.the polymer hydrophobic character changes and diffusion of metal ions into the net becomes slower and therefore different for GLAand EPI.12優(yōu)選課資It can be due to the fact that in the presence of SO42 ions CS exhibits the highest swelling degree in comparison to the presence
10、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 agents of a new generation13優(yōu)選課資14優(yōu)選課資亮點:The main goal of the investigation is
11、 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 Viswanathan,S.MeenakshiJournal of Fluorine Chemistry 129(2008)503509Selective sorption
12、 of fluoride using Fe(III)loaded carboxylated chitosan beads15優(yōu)選課資Selective sorption of fluoride using Fe(III)loaded carboxylated chitosan beads16優(yōu)選課資 The pHzpc of CB is 7.88 where as for Fe-CCB it was shifted to 3.22 whichclearly indicates the occurrence of structural changes in Fe-CCB.Selective so
13、rption of fluoride using Fe(III)loaded carboxylated chitosan beads17優(yōu)選課資Selective sorption of fluoride using Fe(III)loaded carboxylated chitosan beads18優(yōu)選課資19優(yōu)選課資Modified coconut shell fibers:A green and economical sorbent for the removal of anions from aqueous solutions亮點：The powder of green coconu
14、t 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-hidroxypropyltrimethyl ammonium chloride)20優(yōu)選課資400 mL of a 1%CaCO3.Then,the solid was washed thor
15、oughly and dried in an oven at 60 C 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-hydroypropyltrimethylammonium chloride solution was added to the treated powder bagasse under room pressure in o
16、rder 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.吸附劑改性：21優(yōu)選課資季堿化反應(yīng)步驟：22優(yōu)選課資23優(yōu)選課資24優(yōu)選課資Highlight:詳細探討了磷酸根和鉻酸根吸附的行為。研究了鉻酸根和磷酸根吸附中間產(chǎn)物的形態(tài)。并揭示了反應(yīng)生
17、成物與溶度積之間的關(guān)系。25優(yōu)選課資Hydrocalumite (Ca2AlClLDH)的穩(wěn)定性研究前2h內(nèi)，Ca、Al、pH迅速上升。8hCa、Al含量分別為5.7和2.9pH為12。溶解過程導(dǎo)致Ca的釋放和pH的上升。26優(yōu)選課資chromate and phosphate熱力學(xué)27優(yōu)選課資沉淀物的結(jié)構(gòu)分析24h后，水鋁鈣石結(jié)構(gòu)完全小消失高的pH抑制了水鋁鈣石的溶解28優(yōu)選課資產(chǎn)品的相變化，不依賴于pH.鉻酸根的吸附是與氯離子交換29優(yōu)選課資 Ksp-controlled removal process：離子濃度積(CP)與Ksp比較 30優(yōu)選課資吸附機理：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.31優(yōu)選課資THANKSTHANKS32優(yōu)選課資
ppt免費模板【講課適用】
