Risk of cyanobacterial toxins in Riga waters (Latvia)
Risk of cyanobacterial toxins in Riga waters (Latvia)
复制标题
DOI：
10.1016/s0043-1354(00)00042-7
复制
发表时间：
2000-08-01
期刊：
影响因子：
12.8
通讯作者：
Walther, JL
中科院分区：
文献类型：
--
作者：
Eynard, F;Mez, K;Walther, JL
拉脱维亚首都里加被几个湖泊环绕。作为生活和工业废水的接收者，这些湖泊富营养化。其中之一，Mazais Baltezers湖用于通过渗透盆地人工补给地下水（第四纪含水层）。这个湖的水质至关重要，因为地下水最终被用作饮用水的来源。在夏末，该湖发生了重要的蓝藻水华。这些水华是有毒的，并在藻类生物量中分析了微囊藻毒素-LR。采用蛋白磷酸酶抑制试验和高效液相色谱法对微囊藻毒素进行了分析。分析了地表水样品和饮用水样品中的毒素，以评估土壤清洁效率。这项研究表明，由于人类活动，马泽巴尔泰泽湖很容易受到影响，由于蓝藻，其水质可能会迅速变化。该地区的土壤在开花期（8月至9月）不足以有效保护地下水和饮用水免受毒素的影响，而且毒素似乎没有在土壤中降解，这是一个令人关切的问题，因为食用亚急性水平的毒素可能对人类健康有害。毒素浓度表明，今后应监测水源，并采取措施控制水华，清除水中的毒素。(C)2000爱思唯尔科技有限公司版权所有。
Riga, the capital of Latvia, is surrounded by several lakes. Being domestic and industrial wastewater recipients, these lakes are eutrophic. One of them, Lake Mazais Baltezers is used for artificial recharge of the groundwater (Quaternary aquifer) through infiltration basins. The water quality of this lake is crucial as the groundwater is eventually used as a source of drinking water. important cyanobacterial blooms occurred in this lake at the end of summer. These blooms were toxic and microcystin-LR was analysed in the algal biomass. Microcystins were analysed using protein phosphatase inhibition assay and high-performance liquid chromatography. Toxins were analysed in surface water samples as well as drinking water samples to assess the soil cleaning efficiency. This study showed that the Lake Mazais Baltezers was vulnerable due to human activities and its water quality could vary quickly due to cyanobacteria. The soil of this area was not efficient enough to protect the groundwater and the drinking water from toxins during the blooming period (August-September) and it appeared that toxins were not degraded in the soil, which is a cause of concern since the consumption of sub-acute levels may be deleterious to human health. The toxin concentrations indicated that, in the future, the water source should be monitored and that measures should be introduced to control blooms and to remove toxins from the water. (C) 2000 Elsevier Science Ltd. All rights reserved.