CAJ | 학술논문

采用共沉淀法制备纳米介孔ZrO2-Al2 O3-TiO2（记为Zr-A1-Ti）复合氧化物吸附剂，摩尔浓度比分别为2∶2∶1、3∶1∶1、1∶3∶1．考察750℃焙烧3 h对复合氧化物性能的影响，并采用热重分析、示差热分析、X射线衍射和比表面积及孔径测定对复合氧化物进行表征．结果表明，不同金属比例合成的复合氧化物具有不同的晶化温度及晶型转化温度．在实验室模拟EDTA-Cr（1∶1．25）条件下对制备的各复合氧化物吸附剂进行了评价：经750℃焙烧3 h所制得复合氧化物吸附剂对ED T A-铬的吸附在实验铬浓度条件下，随着铬浓度的增加吸附量增大，最大吸附量达到167 mg/g ．综上可得所制备吸附剂对EDTA-Cr的去除是可行的．
채용공침정법제비납미개공ZrO2-Al2 O3-TiO2（기위Zr-A1-Ti）복합양화물흡부제，마이농도비분별위2∶2∶1、3∶1∶1、1∶3∶1．고찰750℃배소3 h대복합양화물성능적영향，병채용열중분석、시차열분석、X사선연사화비표면적급공경측정대복합양화물진행표정．결과표명，불동금속비례합성적복합양화물구유불동적정화온도급정형전화온도．재실험실모의EDTA-Cr（1∶1．25）조건하대제비적각복합양화물흡부제진행료평개：경750℃배소3 h소제득복합양화물흡부제대ED T A-락적흡부재실험락농도조건하，수착락농도적증가흡부량증대，최대흡부량체도167 mg/g ．종상가득소제비흡부제대EDTA-Cr적거제시가행적．
Composite oxide adsorbents of ZrO2-A12 O3-TiO2 , with mesoporous , were pre-pared by co-precipitation method and characterized by TG-DSC ,X-ray diffraction ,BET and pore size analysis to investigate the effects of calcination temperature ,and time on the prop-erties of prepared composite oxides .The results showed that composite oxides synthesized with different metal proportions hold different temperatures of crystallization and crystal transformation .EDTA-Cr (1∶1 .25) was simulated ,under the experimental conditions ,as chromium tanning wastewater to evaluate the adsorping efficiencies of the composite oxides , w hich indicated that composite oxides calcinated at 750 ℃ for 3 hours absorbed more chromi-um with increasing addition of chromium and reached a maximum adsorption equilibrium of 167 mg/g .It is proved to be available to remove EDTA-Cr by our prepared absorbents .