Use of ferric-impregnated volcanic ash for arsenate (V) adsorption from contaminated water with various mineralization degrees.
Ferric-impregnated volcanic ash (FVA) which consisted mainly of different forms of iron and aluminum oxide minerals was developed for arsenate (V) removal from an aqueous medium. The adsorption experiments were conducted in both DI water samples and actual water (Lake Kasumigaura, Japan) to investigate the effects of solution mineralization degree on the As(V) removal. Kinetic and equilibrium studies conducted in actual water revealed that the mineralization of water greatly elevated the As(V) adsorption on FVA. The experiment performed in DI water indicated that the existence of multivalence metallic cations significantly enhanced the As(V) adsorption ability, whereas competing anions such as fluoride and phosphate greatly decreased the As(V) adsorption. It is suggested that FVA is a cost-effective adsorbent for As(V) removal in low-level phosphate and fluoride solution. It was important to conduct the batch experiment using the actual water to investigate the arsenic removal on adsorbents.
Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8572, Japan.
Rongzhi
R
Chen
Zhenya
Z
Zhang
Yingnan
Y
Yang
Zhongfang
Z
Lei
Nan
N
Chen
Xu
X
Guo
Chao
C
Zhao
Norio
N
Sugiura
D000327:Adsorption; D001149:Arsenates / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D018707:Volcanic Eruptions / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000191:economics / Q000379:methods*
D001149:Arsenates; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C025657:arsenic acid