An overview of the removal of algal toxins by water treatment process / 军事医学

The environmental and health problems caused by the frequent occurrence of cyanobacteria blooming and its secondary metabolites,algal toxins, have become a hot spot in environmental science research.This article reviews the production and contamination status of algal toxins, and the removal effects of microcystins(MCs), anatoxin-a(ANTX) and other algal toxins by different water treatment processes, including coagulation and sedimentation, ozone oxidation, activated carbon adsorption,membrane treatment, chlorination and UV irradiation.Furthermore, the factors affecting the removal effect are analyzed,and the advantages and limitations of each water treatment process are summarized.Finally, some feasible proposals are presented regarding the future research of removing algal toxins.

Simultaneous Determination of 10 Kinds of Algal Toxins in Water Samples by Online Solid Phase Extration Coupled with Ultra High Performance Liquid Chromatography- Quadrupole Linear Ion Trap Mass Spectrometry / 分析化学

An online solid phase extraction ( online-SPE) combined with ultra high performance liquid chromatography-quadrupole linear ion trap mass spectrometry (UHPLC-MS / MS-Qtrap) was established for the simultaneous identification and determination of 10 kinds of algal toxins in water samples. Multiple injections of water samples were controlled by a preset program, and the target analytes were enriched by trap column. The six-way valve was switched subsequently, and the algal toxins in the trap column were back-flushed to the analytical column for separation and analysis. The results showed that the online SPE significantly simplified pretreatment process, and the linear ion trap tandem mass spectrometry improved the sensitivity of the determination. Moreover, the establishment of enhanced product ion (EPI) scan library provided evidence for the confirmation of algal toxins. The 10 kinds of algal toxins showed a good linear relationship with correlation coefficient R2>0. 99. The limits of detection (LOD) were 0. 0015 -0. 0050 μg / L. The mean recoveries at three spiked levels of 0. 02, 0. 1, 1. 0 μg / L were from 83. 7% to 98. 5% . The method was suitable for the rapid confirmation and quantitative determination of various algal toxins in water.