岩矿测试
巖礦測試
암광측시
ROCK AND MINERAL ANALYSIS
2010年
1期
55-60
,共6页
白德奎%朱霞萍%王艳艳%曾美兰
白德奎%硃霞萍%王豔豔%曾美蘭
백덕규%주하평%왕염염%증미란
氧化锰%氧化铁%氧化铝%砷%吸附
氧化錳%氧化鐵%氧化鋁%砷%吸附
양화맹%양화철%양화려%신%흡부
manganese oxide%iron oxide%aluminium oxide%arsenic%adsorption4
合成了氧化锰、氧化铁、氧化铝三种矿物,以氧化铁、氧化锰为吸附剂研究了pH值、离子强度和时间等因素对吸附As(Ⅲ)的影响,并讨论了氧化锰、氧化铁、氧化铝三种矿物对As(Ⅲ)的饱和吸附容量及等温吸附实验.pH值对氧化锰吸附As(Ⅲ)几乎不影响,对氧化铁吸附As(Ⅲ)在很大的范围内(pH为3.5~8.5)影响不大,离子强度对二者吸附As(Ⅲ)的影响不大,吸附反应在0.5 h左右达到吸附平衡.在优化吸附条件下氧化锰、氧化铁、氧化铝对As(Ⅲ)的饱和吸附容量分别为48.38 mg/g、23.70 mg/g、3.52 mg/g,三种合成矿物对As(Ⅲ)的饱和吸附容量:氧化锰>氧化铁>氧化铝.对实验数据进行Freundlich和Langmuir拟合,相关系数R均在0.98以上,吸附动力学符合Lagergren二级速率方程.
閤成瞭氧化錳、氧化鐵、氧化鋁三種礦物,以氧化鐵、氧化錳為吸附劑研究瞭pH值、離子彊度和時間等因素對吸附As(Ⅲ)的影響,併討論瞭氧化錳、氧化鐵、氧化鋁三種礦物對As(Ⅲ)的飽和吸附容量及等溫吸附實驗.pH值對氧化錳吸附As(Ⅲ)幾乎不影響,對氧化鐵吸附As(Ⅲ)在很大的範圍內(pH為3.5~8.5)影響不大,離子彊度對二者吸附As(Ⅲ)的影響不大,吸附反應在0.5 h左右達到吸附平衡.在優化吸附條件下氧化錳、氧化鐵、氧化鋁對As(Ⅲ)的飽和吸附容量分彆為48.38 mg/g、23.70 mg/g、3.52 mg/g,三種閤成礦物對As(Ⅲ)的飽和吸附容量:氧化錳>氧化鐵>氧化鋁.對實驗數據進行Freundlich和Langmuir擬閤,相關繫數R均在0.98以上,吸附動力學符閤Lagergren二級速率方程.
합성료양화맹、양화철、양화려삼충광물,이양화철、양화맹위흡부제연구료pH치、리자강도화시간등인소대흡부As(Ⅲ)적영향,병토론료양화맹、양화철、양화려삼충광물대As(Ⅲ)적포화흡부용량급등온흡부실험.pH치대양화맹흡부As(Ⅲ)궤호불영향,대양화철흡부As(Ⅲ)재흔대적범위내(pH위3.5~8.5)영향불대,리자강도대이자흡부As(Ⅲ)적영향불대,흡부반응재0.5 h좌우체도흡부평형.재우화흡부조건하양화맹、양화철、양화려대As(Ⅲ)적포화흡부용량분별위48.38 mg/g、23.70 mg/g、3.52 mg/g,삼충합성광물대As(Ⅲ)적포화흡부용량:양화맹>양화철>양화려.대실험수거진행Freundlich화Langmuir의합,상관계수R균재0.98이상,흡부동역학부합Lagergren이급속솔방정.
Three minerals of manganese oxide, iron oxide and aluminium oxide were synthesized and the effects of pH value and ionic strength of the solution, adsorption equilibrium time on adsorption of As(Ⅲ) by manganese oxide and iron oxide were studied. And the saturated adsorption capacity and the isothermal adsorption of As(Ⅲ) by three minerals were also tested. The results showed that pH value had less influence on adsorption of As(Ⅲ) by manganese oxide and less influence on adsorption of As(Ⅲ) by iron oxide in pH range of 3.5~8.5. The results also showed that ionic strength had less effect on adsorption of As(Ⅲ) by iron oxide and manganese oxide. The adsorption equilibrium time was about half an hour. The order of the saturated adsorption capacity of As(Ⅲ) by three minerals was: manganese oxide>iron oxide>aluminium oxide with saturated adsorption capacities of 48.38 mg/g, 23.70 mg/g and 3.52 mg/g respectively under the optimized adsorption condition. The adsorption data were fitted by both Freundlich and Langmuir isotherm models with correlation coefficient of R>0.98 and adsorption kinetic data correlated well with Lagergren second kinetic equation.