The Adsorption of Hydrogen Fluoride and Fluoride Ion on a Water Treatment Sludge
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概要
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The hydrogen fluoride (HF) and fluoride ion (F^-) adsorption potentials of a water treatment sludge were investigated in a batch mode as a function of pH, contact time, initial fluoride concentrations, and other co-existing anions. The maximum removal of total fluoride was apparently observed at pH 5.1, whereas HF or F^- adsorptions showed nearly 100% in pH range from 2.2 to 4.3. The HF or F^- adsorption by the water treatment sludge has occurred rapidly during the initial 5.60 min and thereafter slowly increased until 48 h. The other anions such as SO_4^<2->, NO_3^- and Cl^- have not adversely affected on extent of HF or F^- adsorption by the water treatment sludge.
- 2009-02-27
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