[Removal of humic substances using cerium-iron adsorbent].
A rare earth metal inorganic adsorbent, cerium-iron adsorbent (CFA), was developed, and its performance for fulvic acid (FA) removal was evaluated. Experimental results show that rare earth metal adsorbent had a relatively high adsorption capacity and good kinetic property for FA ion under the pH range of 3.0-6.5, then the adsorption capacity decreased with the increase of pH. FA seriously inhibited the removal of arsenate, suggesting that the adsorption sites for As(V) and FA were similar. Fourier transform infrared (FTIR) spectra of CFA before and after FA adsorption demonstrated that M-OH groups plays an important role for FA removal. The pH(icp) is 5.6 through the measure of Zeta potential.
Zhang
Yu
Y
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Yang
Min
M
Gao
Ying-xin
YX
Huang
Xia
X
Xue
Chun-fang
CF
D000327:Adsorption; D002563:Cerium; D006812:Humic Substances / Q000032:analysis*; D007501:Iron; D014873:Water Pollutants / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D006812:Humic Substances; D014873:Water Pollutants; D002563:Cerium; D007501:Iron