Preparation and Properties of La3+-Loaded Fluorion Adsorbent
来源期刊：JOURNAL OF RARE EARTHS2004年第2期
论文作者：周钰明 余春香
Key words：organic chemistry; adsorbent; adsorption; F--containing wastewater; rare earths;
Abstract: The La3+-loaded adsorbent was prepared by the reaction between La3+ and ethanolamine-modified vegetable tannic extract,to treat F--containing wastewater.The problems of heavy color caused by vegetable tannic extract and of turbidity caused by reaction between La3+ and F- were solved.When other conditions were not changed,pH,temperature,stirring time,and dose were changed respectively and the adsorbance was tested respectively.The results show that this adsorbent possesses high saturated adsorptive capacity(18.86 mg·g-1)when pH is 5～6,T≤80 ℃,0.2 g dosage,and 180 min agitating time,and the adsorbance reaches the highest(98.5%).The adsorbent can be easily regenerated with 0.5 mol·L-1 NaOH at pH 12.
周钰明1，余春香1
(1.Department of Chemistry and Chemical Engineering,Southeast University,Nanjing 210096,China)
Abstract:The La3+-loaded adsorbent was prepared by the reaction between La3+ and ethanolamine-modified vegetable tannic extract,to treat F--containing wastewater.The problems of heavy color caused by vegetable tannic extract and of turbidity caused by reaction between La3+ and F- were solved.When other conditions were not changed,pH,temperature,stirring time,and dose were changed respectively and the adsorbance was tested respectively.The results show that this adsorbent possesses high saturated adsorptive capacity(18.86 mg·g-1)when pH is 5～6,T≤80 ℃,0.2 g dosage,and 180 min agitating time,and the adsorbance reaches the highest(98.5%).The adsorbent can be easily regenerated with 0.5 mol·L-1 NaOH at pH 12.
Key words:organic chemistry; adsorbent; adsorption; F--containing wastewater; rare earths;
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