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Anatoxin-a adsorption by virgin and preloaded granular activated carbon
被引:3
作者:
Vlad, Silvia
[1
]
Peldszus, Sigrid
[1
]
Anderson, William B.
[1
]
Huck, Peter M.
[1
]
机构:
[1] Univ Waterloo, Dept Civil & Environm Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada
来源:
AWWA WATER SCIENCE
|
2019年
/
1卷
/
01期
基金:
加拿大自然科学与工程研究理事会;
关键词:
activated carbon;
adsorption;
anatoxin-a;
cyanobacteria;
cyanotoxins;
drinking water;
LIQUID-CHROMATOGRAPHY;
CYANOBACTERIAL BLOOMS;
ORGANIC-MATTER;
WATER;
CYANOTOXINS;
REMOVAL;
STATE;
D O I:
10.1002/aws2.1116
中图分类号:
TV21 [水资源调查与水利规划];
学科分类号:
081501 ;
摘要:
Adsorption of the cyanotoxin anatoxin-a (ANTX) in ultrapure water by five virgin and preloaded granular activated carbons (GACs) was examined using the bottlepoint technique; this article presents baseline adsorption data for ANTX not yet available in the literature. Of the virgin carbons, the two wood-based carbons adsorbed ANTX more rapidly than the one coconut-based or two coal-based carbons. Virgin coal-based carbons had the greatest equilibrium capacity (1.8-6.9 mu g/ mg at 1 mu g/L aqueous ANTX) compared with their virgin coconut- and woodbased counterparts (1.2 and 0.9-1.0 mu g/mg, respectively). GAC preloading via exposure to surface water resulted in kinetic changes and reduced capacity. Pre-loaded coal-based carbons adsorbed ANTX faster than the virgin equivalents. At environmentally relevant ANTX concentrations, coal-based preloaded carbons retained higher equilibrium capacity (1.2 mu g/mg) compared with coconut- and wood-based carbons (1.0 and 0.6 mu g/mg, respectively). Natural organic matter competition will affect adsorption performance and should be investigated.
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页数:12
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