海藻酸钙-金属离子凝胶球的制备及其对Cr2O72-的吸附.pdf

· 78· 材料导报B：研究篇 海藻酸钙一金属离子凝胶球的制备及其对Cr2072一的吸附+ 徐敏虹，曹枫，唐培松，王坤燕 (湖州师范学院材料化学与化学系，湖州313000) 摘要 对SA在氯化钙溶液中的成球特性进行了研究，并且添加铁、铝、铜等金属离子制备成SA—Ca-Fe等凝 胶球。采用FTIR、TG等仪器对凝胶球的结构和形态进行了表征。凝胶球的颜色取决于金属离子，直径为3～4 h后，SA- lnin，含水率为94％～96％。研究了不同金属离子的SA-Ca凝胶球吸附CnO，2一的特性。结果表明：反应3 Ca、SA-Ca-Co、SA-Ca-Ni凝胶球对Cr2 小，而SA—Ca-Fe凝胶球对cr2072_的去除率达到93％，准二级吸附动力学方程可很好地描述各类凝胶球的吸附过 程。、 关键词 海藻酸钙凝胶球吸附重铬酸根离子动力学 中图分类号：X703 文献标识码：A ofCalcium Ion BeadsIts MetalGel and PreparationAlginate 2一 of Cr207 Adsorption XU Minhong，CAOFeng，TANGPeisong，WANGKunyan (Materials and Normal 313000) ChemistryDepartment，Huzhou Chemistry College，Huzhou AbstractThe ofcalcium was sodium bailingproperty alginate(SA_Ca)whichpreparedby alginate(SA)in CaCl2solutionwerestudied，andSA-Ca-Febeadswere differentmetalionsontoSA-Ca，suchas gel preparedbyadding F色3+，A13+，Cu2+．Thestructureand ofcalcium beadswerecharacterizedFTIR，TG，etc． morphologyalginategel by Thecolorofthebeads onmetalion．thediametersofthebeadswere3—4mm．andthemoisturecontentsof depended thebeadswere94％一96％．The ofdifferentcalcium ion beadstOCrz072一 adsorptioncapacities alginate-metalgel been have studied．TheresultsshowedthatSA_Ca，SA-Ca-Co，SA-Ca-Nibeads had of