TY - JOUR
T1 - Strong adsorption of arsenic species by amorphous zirconium oxide nanoparticles
AU - Cui, Hang
AU - Li, Qi
AU - Gao, Shian
AU - Shang, Jian Ku
N1 - Funding Information:
This study was supported by the National Basic Research Program of China , Grant No. 2006CB601201 , the Knowledge Innovation Program of Chinese Academy of Sciences , Grant No. Y0N5711171 , and the Knowledge Innovation Program of Institute of Metal Research , Grant No. Y0N5A111A1 .
PY - 2012/7/25
Y1 - 2012/7/25
N2 - A novel oxide adsorbent of amorphous zirconium oxide (am-ZrO 2) nanoparticles was synthesized by a simple hydrothermal process for effective arsenic removal from aqueous environment. Due to their high specific surface area (327.1m 2/g), large mesopore volume (0.68cm 3/g), and the presence of high affinity surface hydroxyl groups, am-ZrO 2 nanoparticles demonstrated exceptional adsorption performance on both As(III) (arsenite) and As(V) (arsenate) without pre-treatment at near neutral condition. At pH∼7, the adsorption kinetic is fast and the adsorption capacity is high (over 83mg/g for As(III) and over 32.4mg/g for As(V), respectively). Under low equilibrium arsenic concentrations (C e at 0.01mg/L, the maximum contaminant level (MCL) for arsenic in drinking water), the amount of arsenic adsorbed by am-ZrO 2 nanoparticles is over 0.92mg/g for As(III) and over 5.2mg/g for As(V), respectively. The adsorption mechanism of arsenic species onto am-ZrO 2 nanoparticles was found to follow the inner-sphere complex mechanism. Testing with arsenic contaminated natural lake water confirmed the effectiveness of these am-ZrO 2 nanoparticles in removing arsenic from natural water. The immobilized am-ZrO 2 nanoparticles on glass fiber cloth demonstrated an even better arsenic removal performance than dispersed am-ZrO 2 nanoparticles in water, paving the way for their potential applications in water treatment facility to treat arsenic contaminated water body without pre-treatment.
AB - A novel oxide adsorbent of amorphous zirconium oxide (am-ZrO 2) nanoparticles was synthesized by a simple hydrothermal process for effective arsenic removal from aqueous environment. Due to their high specific surface area (327.1m 2/g), large mesopore volume (0.68cm 3/g), and the presence of high affinity surface hydroxyl groups, am-ZrO 2 nanoparticles demonstrated exceptional adsorption performance on both As(III) (arsenite) and As(V) (arsenate) without pre-treatment at near neutral condition. At pH∼7, the adsorption kinetic is fast and the adsorption capacity is high (over 83mg/g for As(III) and over 32.4mg/g for As(V), respectively). Under low equilibrium arsenic concentrations (C e at 0.01mg/L, the maximum contaminant level (MCL) for arsenic in drinking water), the amount of arsenic adsorbed by am-ZrO 2 nanoparticles is over 0.92mg/g for As(III) and over 5.2mg/g for As(V), respectively. The adsorption mechanism of arsenic species onto am-ZrO 2 nanoparticles was found to follow the inner-sphere complex mechanism. Testing with arsenic contaminated natural lake water confirmed the effectiveness of these am-ZrO 2 nanoparticles in removing arsenic from natural water. The immobilized am-ZrO 2 nanoparticles on glass fiber cloth demonstrated an even better arsenic removal performance than dispersed am-ZrO 2 nanoparticles in water, paving the way for their potential applications in water treatment facility to treat arsenic contaminated water body without pre-treatment.
KW - Adsorption
KW - Amorphous ZrO nanoparticles
KW - As(III) and As(V) removal
KW - Inner-sphere complex mechanism
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U2 - 10.1016/j.jiec.2012.01.045
DO - 10.1016/j.jiec.2012.01.045
M3 - Article
AN - SCOPUS:84862810506
SN - 1226-086X
VL - 18
SP - 1418
EP - 1427
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 4
ER -