DocumentCode :
2761828
Title :
Removal of As(III) and As(V) from Drinking Water by Nanoscale Zero-valent Iron
Author :
Huang, Yuanying ; Tan, Keyan ; Tang, Qifeng ; Liu, Fei ; Liu, Dandan
Author_Institution :
Nat. Res. Center for GeoAnalysis, Beijing, China
Volume :
2
fYear :
2010
fDate :
6-7 March 2010
Firstpage :
111
Lastpage :
114
Abstract :
Nanoscale zero-valent iron (NZVI) was synthesized in the laboratory for the removal of As(III) (arsenite) and As(V) (arsenate). Average BET surface areas of the particles was 49.16 m2/g, with diameter in the range of 20-40 nm. Batch and column experiments were conducted to investigate adsorption kinetics and efficiency of arsenic removal with NZVI. The results showed that both arsenate and arsenite could be removed efficiently by NZVI at pH 7, 22 ± 1°C. The removal rate for As(III) and As(V) was over 99.5% within 60 min using 0.25 g NZVI. The arsenic adsorption process followed the pseudo-first-order kinetic expression. The surface-area-normalized rate coefficient kSA was 3.42mL/m2·min for As(III). Based on the result, NZVI is a suitable sorbent to treat the drinking water containing arsenic due to its high reactivity.
Keywords :
geochemistry; water pollution; water quality; adsorption kinetics; arsenate; arsenic adsorption process; arsenic removal; arsenite; average BET surface areas; batch experiment; column experiment; drinking water; nanoscale zero-valent iron; pH; pseudofirst-order kinetic expression; removal rate; surface-area-normalized rate coefficient; Bladder; Cancer; Chemical analysis; Geology; Humans; Iron; Kinetic theory; Skin; Surface treatment; Water resources; As(III) and As(V); NZVI; Removal;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Challenges in Environmental Science and Computer Engineering (CESCE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-0-7695-3972-0
Electronic_ISBN :
978-1-4244-5924-7
Type :
conf
DOI :
10.1109/CESCE.2010.232
Filename :
5493239
Link To Document :
بازگشت