氚化废水进入环境的生态风险备受关注。通过研究低活性tri暴露对淡水微环境的环境和生物学影响以及有机结合tri(OBT)在微藻和水生植物中的富集潜力,评估含tri污染的生态风险至关重要。利用微观实验模拟淡水系统中的氚污染,分析了氚污染废水对淡水系统微环境的影响。低活性氚污染(105Bq/L)诱导微生物丰度差异,与变形杆菌,拟杆菌,和脱硫细菌在水系统中占据重要的生态位。低活性氚(105-107Bq/L)不影响微藻和水生植物的生长,但OBT在微藻和两种水生植物中显著富集(Pistiastratiotes,Spirodelapolyrhoriza),富集系数分别为2.08-3.39和1.71-2.13。在转录水平,低活性氚(105Bq/L)有干扰水生植物基因表达的风险。四种优势蓝细菌菌株(Leptolyngbyasp。,长毛球球菌,Nostocsp.,Anabaenasp.)被分离并表现出对氚污染的良好环境适应性。环境因素可以改变tri在蓝藻和微藻中的积累潜力,理论上加强食物链转移。
The ecological risk of tritiated wastewater into the environment has attracted much attention. Assessing the ecological risk of
tritium-containing pollution is crucial by studying low-activity
tritium exposure\'s environmental and biological effects on freshwater micro-environment and the enrichment potential of organically bound
tritium (OBT) in microalgae and aquatic plants. The impact of
tritium-contaminated wastewater on the microenvironment of freshwater systems was analyzed using microcosm experiments to simulate
tritium pollution in freshwater systems. Low activity tritium pollution (105 Bq/L) induced differences in microbial abundance, with Proteobacteria, Bacteroidota, and Desulfobacterota occupying important ecological niches in the water system. Low activity
tritium (105-107 Bq/L) did not affect the growth of microalgae and aquatic plants, but OBT was significantly enriched in microalgae and two aquatic plants (Pistia stratiotes, Spirodela polyrrhiza), with the enrichment coefficients of 2.08-3.39 and 1.71-2.13, respectively. At the transcriptional level, low-activity tritium (105 Bq/L) has the risk of interfering with gene expression in aquatic plants. Four dominant cyanobacterial strains (Leptolyngbya sp., Synechococcus elongatus, Nostoc sp., and Anabaena sp.) were isolated and demonstrated good environmental adaptability to tritium pollution. Environmental factors can modify the tritium accumulation potential in cyanobacteria and microalgae, theoretically enhancing food chain transfer.