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Moringa-Seed-Based Coagulant Removes Microcystins Dissolved in Water

机译：辣木籽凝结剂可去除水中溶解的微囊藻毒素

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Toxic cyanobacterial blooms commonly occur in bodies of water used to supply drinking water, leading to the presence of high concentrations of toxins in the water. Among the cyanotoxins, microcystins are the most frequently encountered in aquatic ecosystems. They have been associated with animal and human intoxication, illness, and death. Most of the chemical and physical methods employed by water control managers to control cyanobacteria and cyanotoxins are neither cost effective nor efficient. As an alternative, using natural coagulants that are biodegradable and easily deployed for water purification in small human communities have been proposed. In the present study, 28 assays are carried out using the jar test to investigate the effect of stirring rotation (time and speed), pH, and aqueous extracts of Moringa oleifera L. seeds (AqMO) on the cells, turbidity, and removal of Microcystis aeruginosa cells and extracellular microcystins. Cell removal efficiency ranged from -22.6 +/- 1.3 to 85.8 +/- 0.6%, and the reduction in turbidity ranged from -14.0 +/- 3.1 to 87.4 +/- 0.3% as a function of the different treatments. According to the critical value predicted, an AqMO dose of 540mgL(-1) combined with an initial cell density of 10 +/- 10(5) cells mL(-1) will completely remove M. aeruginosa cells and significantly decrease extracellular microcystins content (ca. 54.4 +/- 7.9%). These results show promise for the development of effective treatments of potable water contaminated with cyanobacteria and microcystins in rural and isolated areas, thereby reducing the public health risks associated with these organisms.
机译：有毒的蓝细菌绽放通常发生在用于提供饮用水的水域中，导致水中存在高浓度的毒素。在蓝藻毒素中，微囊藻毒素是水生生态系统中最常见的。它们与动物和人类的醉酒，疾病和死亡有关。水控制管理人员用来控制蓝细菌和蓝藻毒素的大多数化学和物理方法既没有成本效益，也没有效率。作为替代方案，已经提出了使用可生物降解并且易于部署的天然凝结剂用于小型人类社区的水净化。在本研究中，使用广口瓶试验进行了28种测定，以研究搅拌旋转（时间和速度），pH和辣木种子（AqMO）的水提物对细胞的影响，浊度和去除率。铜绿微囊藻细胞和细胞外微囊藻毒素。细胞去除效率的范围为-22.6 +/- 1.3至85.8 +/- 0.6％，混浊度的降低范围为-14.0 +/- 3.1至87.4 +/- 0.3％，具体取决于不同的处理方法。根据预测的临界值，将540mgL（-1）的AqMO剂量与10 +/- 10（5）个细胞mL（-1）的初始细胞密度相结合，将完全去除绿脓杆菌细胞并显着降低细胞外微囊藻毒素的含量（约54.4 +/- 7.9％）。这些结果表明有望在农村和偏远地区开发出一种有效处理被蓝细菌和微囊藻毒素污染的饮用水的方法，从而减少与这些生物体有关的公共健康风险。

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