高藻水处理过程中藻源内毒素的释放机制、聚集行为和控制方法研究

The increasing algae blooming and the release of algal-derived organic matters caused by eutrophication pose a great challenge for drinking water treatment plant. Endotoxins released by cyanobacteria may cause potential risk by blood, respiration and gastrointestinal exporsure. This research is to study the release, aggregation and control of endotoxins during water treatment process, in order to ensure the safety of drinking water. Field survey and lab experiment will be conducted to investigate the endotoxin contamination in water treatment. Meanwhile, we plan to study the kinetics of endotoxin release during oxidation of algae based on the multivariate nonlinear regression models. In addition, the fluorescence probe method is employed to study the aggregation and the molecular structure of endotoxin will be characterized in order to understand the aggregation mechanism. At last, the cost-effective control schemes of endotoxins are proposed and these studies provide technical support on management and control of algae-laden water.

水体富营养化带来的藻类爆发及次级代谢物污染问题给饮用水处理带来巨大挑战。藻类释放的内毒素能够通过血液、呼吸和胃肠暴露途径引发机体健康风险，研究藻源内毒素在饮用水处理过程中的释放机制、聚集行为和控制方法对于保障富营养化水源饮用水安全至关重要，目前国内外尚未系统开展相关研究。本课题拟通过实地调查与实验研究相结合的方法对高藻水处理过程中内毒素浓度水平进行跟踪检测，采用多元非线性回归模型研究藻类氧化过程中内毒素的释放机制及影响因素，利用荧光探针分子考察水相复杂基体中内毒素的聚集行为并进行微观结构表征解析其形成机制，从而提出经济高效的藻源内毒素控制技术方法，为供水部门应对高藻水污染问题的管理和控制提供科学技术支持。

水体富营养化带来的藻类爆发及次级代谢物污染问题给饮用水处理带来巨大挑战。藻类释放的内毒素能够通过血液、呼吸和胃肠暴露途径引发机体健康风险，研究藻源内毒素在饮用水处理过程中的释放机制、聚集行为和控制方法对于保障富营养化水源饮用水安全至关重要。本项目以高藻水处理过程中微囊藻源内毒素、藻毒素及胞内有机物的释放及控制方法为基础，对不同水处理工艺中内毒素去除效果进行分析评价，系统研究了藻源内毒素在藻类氧化过程中的释放与降解规律，利用荧光探针分子揭示了水相复杂基体中内毒素的聚集行为，遴选了适合高藻水处理的预氧化工艺及相关参数，控制藻类生长的同时减少内毒素对饮用水安全的影响，为供水部门应对高藻水污染问题的管理和控制提供科学技术支持。