Department of Civil and Environmental Engineering, Faculty of Technology, University of Brasilia, Brasilia 70910-900, Brazil.
Toxins (Basel). 2023 Sep 2;15(9):543. doi: 10.3390/toxins15090543.
The occurrence of toxic blooms of cyanobacteria has been a matter of public health interest due to the cyanotoxins produced by these microorganisms. Cylindrospermopsin (CYN) is a cyanotoxin of particular concern due to its toxic effects on humans. This study investigated the removal and effects of CYN in ripened slow sand filters (SSFs) treating water from Paranoá Lake, Brasilia, Brazil. Four pilot-scale SSFs were ripened and operated for 74 days. Two contamination peaks with CYN were applied along the filtration run. The improvement of any of the evaluated water quality parameters was not affected by the presence of CYN in the raw water. The SSFs efficiently removed CYN, presenting concentrations lower than 0.8 µg/L in the filtered water. The microbiota of the SSFs were dominated by protozoa of the genus and amoebas of the genera , , and , together with some groups of rotifers. These microorganisms played a crucial role in removing total coliforms and . In addition, CYN was not identified as a determining factor in the microbiota composition.
由于这些微生物产生的蓝藻毒素，蓝藻水华的发生一直是公众健康关注的问题。柱孢藻毒素 (CYN) 是一种特别值得关注的蓝藻毒素，因为它对人类有毒。本研究调查了在处理巴西巴西利亚帕拉诺阿湖水源的成熟慢滤池 (SSF) 中去除和影响 CYN 的情况。四个中试规模的 SSF 成熟并运行了 74 天。在过滤过程中进行了两次 CYN 污染峰值处理。在原水中存在 CYN 的情况下，任何评估的水质参数的改善都不会受到影响。SSF 能够有效地去除 CYN，在过滤水中的浓度低于 0.8 µg/L。SSF 的微生物群落主要由原生动物属 和变形虫属 、 和 组成，还有一些轮虫类群。这些微生物在去除总大肠菌群和 方面发挥了重要作用。此外，CYN 并未被确定为微生物群落组成的决定因素。
