V impaktovaném periodiku Ozone-Science & Engineering vyšla odborná studie „Removal of natural bloom algal organic matter and associated toxins by coagulation and ozonation“ od autorů Načeradská, Jana – Semerád, Jaroslav – Cajthaml, Tomáš – Pivokonský, Martin, která vznikla také jako součást výstupů Strategie AV 21 Epicentra civilizace.
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Algal organic matter (AOM) and associated cyanotoxins pose a challenge for water treatment, with coagulation and ozonation among the most commonly used strategies for their removal. Degradation of cyanotoxins in the AOM matrix has been studied sparsely, and little attention has been paid to inflammatory and toxic lipopolysaccharides. This study investigated the removal of AOM derived from a natural bloom dominated by Microcystis aeruginosa, including cyanotoxins microcystins (MCs) and lipopolysaccharides (LPSs), by ozonation, Al- and Fe-based coagulation, and coagulation followed by ozonation. The impact of ozone dose and pH value was evaluated. The results showed that coagulation removed up to 46% of AOM (determined as dissolved organic carbon – DOC), up to 32% of total MCs, and up to 92% of LPSs at acidic to neutral pH ranges. Ozonation had no impact on DOC concentrations but degraded MCs with increasing efficiency as pH decreased. Ozonation employed after coagulation contributed to DOC, LPS, and especially MC removals. The combination of coagulation and ozonation has proven effective in removing LPSs and MCs in the AOM matrix, while residual DOC requires additional treatment. Both coagulation and ozonation performance depended on pH value, indicating the importance of pH control in water treatment processes.