应用化工
應用化工
응용화공
Applied Chemical Industry
2015年
10期
1871-1877
,共7页
杨远盛%李正军%王诗生%盛广宏
楊遠盛%李正軍%王詩生%盛廣宏
양원성%리정군%왕시생%성엄굉
磁性复合材料%凹凸棒石%铁酸钴%亚甲基蓝%吸附
磁性複閤材料%凹凸棒石%鐵痠鈷%亞甲基藍%吸附
자성복합재료%요철봉석%철산고%아갑기람%흡부
magnetic composite%palygorskite%cobalt ferrite%methylene blue%adsorption
通过低温回流法制备具有吸附和磁性能的凹凸棒石/ CoFe2 O4磁性复合材料（MAT），利用傅里叶红外光谱（FTIR）、振动样品磁强计（VSM）、扫描电镜（SEM）、X 射线衍射（XRD）等对 MAT 进行表征，并研究了 MAT 对亚甲基蓝（MB）的吸附性能。结果表明，磁性粒子 CoFe2 O4以简单的物理沉积负载于凹凸棒石表面；MAT 饱和比磁化强度14 emu/ g，磁性较强，易于磁分离；比表面积175.85 m2/ g，略大于凹凸棒石。对于25 mL 浓度100 mg/ L MB 溶液，MAT 最佳投加量为0.050 g；在 pH 3~9范围内，MAT 吸附量随 pH 值的增大而增大；当温度在293~338 K， MAT 的吸附等温线符合 Langmuir 方程，吸附焓变1.61 kJ/ mol，Gibbs 自由能变-28.51~33.16 kJ/ mol，吸附熵变102.48~102.87 kJ/ mol，表明该吸附是个吸热、自发且熵增过程；MAT 对 MB 的吸附动力学符合准二级动力学方程，是外表面吸附。
通過低溫迴流法製備具有吸附和磁性能的凹凸棒石/ CoFe2 O4磁性複閤材料（MAT），利用傅裏葉紅外光譜（FTIR）、振動樣品磁彊計（VSM）、掃描電鏡（SEM）、X 射線衍射（XRD）等對 MAT 進行錶徵，併研究瞭 MAT 對亞甲基藍（MB）的吸附性能。結果錶明，磁性粒子 CoFe2 O4以簡單的物理沉積負載于凹凸棒石錶麵；MAT 飽和比磁化彊度14 emu/ g，磁性較彊，易于磁分離；比錶麵積175.85 m2/ g，略大于凹凸棒石。對于25 mL 濃度100 mg/ L MB 溶液，MAT 最佳投加量為0.050 g；在 pH 3~9範圍內，MAT 吸附量隨 pH 值的增大而增大；噹溫度在293~338 K， MAT 的吸附等溫線符閤 Langmuir 方程，吸附焓變1.61 kJ/ mol，Gibbs 自由能變-28.51~33.16 kJ/ mol，吸附熵變102.48~102.87 kJ/ mol，錶明該吸附是箇吸熱、自髮且熵增過程；MAT 對 MB 的吸附動力學符閤準二級動力學方程，是外錶麵吸附。
통과저온회류법제비구유흡부화자성능적요철봉석/ CoFe2 O4자성복합재료（MAT），이용부리협홍외광보（FTIR）、진동양품자강계（VSM）、소묘전경（SEM）、X 사선연사（XRD）등대 MAT 진행표정，병연구료 MAT 대아갑기람（MB）적흡부성능。결과표명，자성입자 CoFe2 O4이간단적물리침적부재우요철봉석표면；MAT 포화비자화강도14 emu/ g，자성교강，역우자분리；비표면적175.85 m2/ g，략대우요철봉석。대우25 mL 농도100 mg/ L MB 용액，MAT 최가투가량위0.050 g；재 pH 3~9범위내，MAT 흡부량수 pH 치적증대이증대；당온도재293~338 K， MAT 적흡부등온선부합 Langmuir 방정，흡부함변1.61 kJ/ mol，Gibbs 자유능변-28.51~33.16 kJ/ mol，흡부적변102.48~102.87 kJ/ mol，표명해흡부시개흡열、자발차적증과정；MAT 대 MB 적흡부동역학부합준이급동역학방정，시외표면흡부。
Attapulgite / CoFe2 O4 magnetic composite(MAT)with adsorption and magnetic was prepared by low temperature reflow method. Using FTIR,VSM,SEM,XRD to characterize the MAT,and studied MAT adsorption of methylene blue(MB). The results showed that the magnetic particles CoFe2 O4 was loaded on the surface of attapulgite by a simple physical deposition way. ATM saturation magnetization ratio was 14 emu / g,had strong magnetic,magnetic separation easier. Its specific surface area was 175. 85 m2 / g,and was slightly larger than attapulgite. For 25 mL concentration of 100 mg / L MB solution, MAT optimum dosage was 0. 050 g;While pH is in the range of 3 ~ 9,MAT adsorption capacity increased with pH value increasing;Over the temperature range of 293 ~ 338 K,the adsorption thermodynamic was complied with the Langmuir adsorption isotherm equation,the adsorption enthalpy change was 1. 61 kJ/ mol, Gibbs free energy were -28. 51 ~33. 16 kJ/ mol,the entropy were 102. 48 ~102. 87 kJ/ mol. It showed that the adsorption is endothermic,spontaneous and entropy increasing process. The adsorption kinetic was complied with the pseudo-second-order kinetic equation,and belonged to the outer surface adsorption.
