[Removal of arsenate by a new type of ion exchange fiber].
A new type of ion exchange fiber was prepared for the removal of arsenate from water. A batch sorption experiments showed that the fibrous sorbent had high sorption capacity and good kinetic property for arsenate ion. The sorption kinetic data can be described by the Lagergren pseudo-second order rate equation very well. Freundlich model can simulate the adsorption equilibrium data of arsenate ion in the studied concentration range. The removal of arsenate by the fiber reached a maximum in pH value range of 3.5 to 7.0. The column performance was carried to assess the applicability of the ion exchange fiber for the removal of arsenate ion with satisfactory result. The diluted NaOH solution is an efficient eluant for the desorption of arsenate on from the fiber column, and 30 mL of 0.5 mol/L NaOH can quantitatively recover arsenate from water.
Liu
Ruixia
R
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Wang
Yaxiong
Y
Tang
Hongxiao
H
D000327:Adsorption; D001149:Arsenates / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D001149:Arsenates; D014874:Water Pollutants, Chemical; C025657:arsenic acid