Source Jouranl of CSCD
Source Journal of Chinese Scientific and Technical Papers
Included as T2 Level in the High-Quality Science and Technology Journals in the Field of Environmental Science
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Volume 33 Issue 7
Nov.  2015
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2015  >  33(7): 56-60
Liu Guo, Wu Xi Li Jun, . RESEARCH ON ADSORPTION OF Cd( Ⅱ) BY EDTA INTERCALATED HYDROTALCITE[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 41-45?.
Citation: Han Xiaofeng Li Hongyan, Meng Qinglan Zhang Xiaolei, . RESEARCH ON PREPARATION AND FLUORIDE REMOVAL PERFORMANCE OF LANTHANUM-MAGNESIUM-LOADED ACTIVATED ALUMINA[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 56-60.
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RESEARCH ON PREPARATION AND FLUORIDE REMOVAL PERFORMANCE OF LANTHANUM-MAGNESIUM-LOADED ACTIVATED ALUMINA

  • Publish Date: 2015-07-22
    Abstract
  • Lanthanum-Magnesium-loaded activated alumina prepared through impregnation was used to remove fluoride from aqueous solution． By orthogonal experiment，the paper studied effect of absorbability with La3 + /Mg2 + molar ratio，calcination temperature and calcination time． The optimum conditions were as follows: The molar ratio of La3 + to Mg2 + was 1 ∶ 2，the calcination temperature was 300 ℃，the calcination time was 2. 0 h． The influence of contact time，absorbent dosage，pH， and coexisted negative ions on fluoride adsorption were performed． Results showed that the optimum effect was contact time of 3. 0 h，absorbent dosage of 3. 6 mg /L，pH of 6 ～ 9， and the removal rate was 94. 5%． The influence of different anions on the adsorption was: CO2 － 3 ＞ SO2 － 4 ＞ Cl － ＞ NO － 3 ． Kinetic data were well described by the pseudo-second-order kinetic model． The adsorption isotherm could be well fitted by the Langmuir equation． The max adsorption capacity was 7. 663 mg /g． The results demonstrated that the adsorption process was spontaneous and endothermic．
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