Ahammed Md Shakir, Baten Md Abdul, Ali Muhammad Aslam, Mahmud Shahin, Islam Md Sirajul, Thapa Bhim Sen, Islam Md Aminul, Miah Md Alim, Tusher Tanmoy Roy
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.
Department of Biotechnology and Genetic Engineering, Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh.
Biology (Basel). 2023 May 1;12(5):675. doi: 10.3390/biology12050675.
This study investigated the phycoremediation abilities of (microalga) and (cyanobacterium) for the detoxification of polluted river water. Lab-scale phycoremediation experiments were conducted for 20 days at 30 °C using the microalgal and cyanobacterial strains and water samples collected from the Dhaleswari river in Bangladesh. The physicochemical properties such as electrical conductivity (EC), total dissolved solids (TDS), biological oxygen demand (BOD), hardness ions, and heavy metals of the collected water samples indicated that the river water is highly polluted. The results of the phycoremediation experiments demonstrated that both microalgal and cyanobacterial species significantly reduced the pollutant load and heavy metal concentrations of the river water. The pH of the river water was significantly raised from 6.97 to 8.07 and 8.28 by and , respectively. demonstrated higher efficacy than in reducing the EC, TDS, and BOD of the polluted river water and was more effective at reducing the pollutant load of SO and Zn. In regard to hardness ions and heavy metal detoxification, performed better at removing Ca, Mg, Cr, and Mn. These findings indicate that both microalgae and cyanobacteria have great potential to remove various pollutants, especially heavy metals, from the polluted river water as part of a low-cost, easily controllable, environmentally friendly remediation strategy. Nevertheless, the composition of polluted water should be assessed prior to the designing of microalgae- or cyanobacteria-based remediation technology, since the pollutant removal efficiency is found to be species dependent.
本研究调查了（微藻）和（蓝细菌）对污染河水进行解毒的藻修复能力。使用从孟加拉国达勒斯瓦里河采集的微藻和蓝细菌菌株及水样，在30℃下进行了为期20天的实验室规模藻修复实验。采集水样的物理化学性质，如电导率（EC）、总溶解固体（TDS）、生物需氧量（BOD）、硬度离子和重金属，表明河水受到高度污染。藻修复实验结果表明，微藻和蓝细菌物种均显著降低了河水的污染物负荷和重金属浓度。河水的pH值分别被和显著提高到8.07和8.28。在降低污染河水的EC、TDS和BOD方面，表现出比更高的功效，并且在降低SO和Zn的污染物负荷方面更有效。在硬度离子和重金属解毒方面，在去除Ca、Mg、Cr和Mn方面表现更好。这些发现表明，作为一种低成本、易于控制、环境友好的修复策略的一部分，微藻和蓝细菌都具有从污染河水中去除各种污染物，尤其是重金属的巨大潜力。然而，在设计基于微藻或蓝细菌的修复技术之前，应评估污染水的成分，因为发现污染物去除效率取决于物种。
