Department of Environmental Science, Faculty of Science and Technology, Bangladesh University of Professionals, Mirpur Cantonment, Dhaka, 1216, Bangladesh.
Department of Safety and Environment, Radiant Pharmaceuticals Limited, Dhaka, Bangladesh.
Environ Monit Assess. 2023 Sep 14;195(10):1210. doi: 10.1007/s10661-023-11835-0.
Since Bangladesh already has robust pharmaceutical industries, nearly all companies owned effluent treatment plant (ETP) facilities to improve the quality of wastewater. Water retreatment utilizing affordable, accessible, and environmentally sustainable techniques have not yet been thoroughly investigated. In this study, the potential of water hyacinth and water lettuce was investigated at three different concentrations: 50% of total volume coverages (1000 g macrophytes/2000 ml water), 75% of total volume coverages (1500 g macrophytes/2000 ml water), and 100% of total volume coverages (2000 g macrophytes/2000 ml water) on the post-treated ETP's wastewater for 3 weeks in a mesocosm environment. Heavy metals, such as chromium (Cr) and nickel (Ni) along with physicochemical parameters (pH, EC, TDS, DO, and BOD) were measured after 7 days intervals. Results indicated that water hyacinth was considerably more efficient than water lettuce at removing many factors, including metals. Water hyacinth was able to remove 79.15% of nickel and 92.97% of chromium while also increasing DO and EC by 36.72% and 14.59%, respectively, at 100% of total volume coverages. On the other hand, 100% of the total volume coverage of water lettuce decreased the pH, TDS, and BOD readings by 6.70%, 31.62%, and 87.61%, respectively. With each treatment, the water quality significantly improved over the control. The findings suggest that the pharmaceutical industries may improve the quality of their treated wastewater even more by integrating phytoremediation technology with traditional ETP facilities.
由于孟加拉国已经拥有强大的制药工业，几乎所有的公司都拥有废水处理厂（ETP）设施，以提高废水的质量。利用负担得起、可及和环境可持续的技术进行水再处理尚未得到彻底研究。在这项研究中，水葫芦和水蕹菜的潜力在三种不同浓度下进行了研究：总容积覆盖的 50%（1000 克大型植物/2000 毫升水）、75%（1500 克大型植物/2000 毫升水）和 100%（2000 克大型植物/2000 毫升水）在中观环境中对 ETP 处理后的废水进行了 3 周的处理。在 7 天的间隔后，测量了重金属（如铬（Cr）和镍（Ni）以及理化参数（pH、EC、TDS、DO 和 BOD）。结果表明，水葫芦在去除许多因素方面比水蕹菜更有效，包括金属。水葫芦能够去除 79.15%的镍和 92.97%的铬，同时还将 DO 和 EC 分别提高了 36.72%和 14.59%，而在 100%的总容积覆盖下。另一方面，水蕹菜的 100%总容积覆盖将 pH、TDS 和 BOD 的读数分别降低了 6.70%、31.62%和 87.61%。在每种处理下，水质都比对照显著改善。研究结果表明，制药行业可以通过将植物修复技术与传统的 ETP 设施相结合，进一步提高处理后废水的质量。
