采用异相合成法,以硅胶为基质、氨基硫脲为功能试剂,通过硅烷偶联剂连接制备出一种新型吸附材料.利用FT-IR、BET、TG与XRD等分析技术对材料的性质进行表征,并进一步研究其对Pd2+的动态吸附性能.结果表明:与未改性的硅胶相比,经氨基硫脲改性后的硅胶对pd2+的吸附性能得到大幅度提升;Thomas模型能够准确地反映吸附过程特征,其相关性系数均大于0.930.在给定的实验条件下,其动态最大吸附容量为0.121mmol/g,最大回收率为55.91％;提高溶液初始浓度和吸附柱高度,或者降低流速,可提高材料的饱和吸附容量;材料经过5次循环使用后,吸附能力基本保持不变,可重复利用.
参考文献
| [1] | 余建民.贵金属萃取化学[M].北京:化学工业出版社,2010:3-5 YU Jian-min.Solvent extraction chemistry of precious metals[M].Beijing:Chemical Industry Press,2010:3-5.,2010. |
| [2] | 汪云华,吴晓峰,童伟锋.铂族金属催化剂回收技术及发展动态[J].贵金属,2011(01):76-81. |
| [3] | SUN J,CHEN Z M,GEM Y,XU L,ZHAI M L .Selective adsorption of Hg(Ⅱ) by γ-radiation synthesized silica-graft-vinyl imidazole adsorbent[J].Journal of Hazardous Materials,2013,244 |
| [4] | BAI L,HUH P,FU W,WAN J,CHENG X L,ZHUGE L,XIONG L,CHEN Q Y .Synthesis of a novel silica-supported dithiocarbamate adsorbent and its properties for the removal of heavy metal ions[J].Journal of Hazardous Materials,2011,195 |
| [5] | LIU W,YIN P,LIU X G,DONG X Q,ZHANG J,XU Q .Thermodynamics,kinetics,and isotherms studies for gold(Ⅲ) adsorption using silica functionalized by diethylenetriaminemethy-lenephosphonic acid[J].Chemical Engineering Research and Design,2013,1237 |
| [6] | SHARMA R K,PANDEY A,CULATI S,ADHOLEYA A .An optimized procedure for preconcentration,determination and on-line recovery of palladium using highly selective diphenyldiketone-monothiosemicarbazone modified silica gel[J].Journal of Hazardous Materials,2012,209 |
| [7] | HASSANIEN M M .FAAS determination of palladium after its selective recovery by silica modified with hydrazone derivative[J].Microchim Acta,2009,167:81-89.,2009. |
| [8] | RASTEGARZADEH S,POURREZA N,KIASAT A R,YAHYAVI H .Selective solid phase extraction of palladium by adsorption of its 5(p-dimethylaminobenzylidene)rhodanine complex on silica-PEG as a new adsorbent[J].Microchim Acta,2010,170:135-140.,2010. |
| [9] | BARAL S S,DAS N,RAMULU T S,SAHOO S K,DAS S N,ROYCHAUDHURY G .Removal of Cr(Ⅵ) by thermally activated weed Salvinia cucullata in a fixed-bed column[J].Journal of Hazardous Materials,2009,161:1427-1435.,2009. |
| [10] | HASFALINA C M,MARYAM R Z,LUQMAN C A,Rashid M .Adsorption of copper(Ⅱ) from aqueous medium in fixed-bed column by kenaf fibres[J].Procedia APCBEE,2012,3 |
| [11] | NECIP A,ASIM O,WANG S B .Adsorption of cadmium(Ⅱ) and zinc(Ⅱ) on boron enrichment process waste in aqueous solutions:Batch and fixed-bed system studies[J].Chemical Engineering Journal,2012,192 |
| [12] | GANDHI M R,MEENAKSHI S .Preparation and characterization of silica gel/chitosan composite for the removal of Cu(Ⅱ) and Pb(Ⅱ)[J].International Journal of Biological Macromolecules,2012,50 |
| [13] | MIHAELA M,AURORA R,NICOLETA C,ION T,VASILE H .Mesoporous silica functionalized with 1-furoyl thiourea urea for Hg(Ⅱ) adsorption from aqueous media[J].Journal of Hazardous Materials,2010,182:197-203.,2010. |
| [14] | 张盈 .硅胶键载脂肪多胺吸附材料的设计、合成及性能研究[D].鲁东大学,2009. |
| [15] | TIAN Y,YIN P,QU R J,WANG C H,ZHENG H G,YU Z X .Removal of transition metal ions from aqueous solutions by adsorption using a novel hybrid material silica gel chemically modified by triethylenetetraminomethylenephosphonic acid[J].Chemical Engineering Journal,2010,162(2):573-579.,2010. |
| [16] | YIN P,XU Q,QU R J,ZHAO G F .Removal of transition metal ions from aqueous solutions by adsorption onto a novel silica gel matrix composite adsorbent[J].Journal of Hazardous Materials,2009,169:228-232.,2009. |
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