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.
引用
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页数:12
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