利用藻酸盐固定化海洋硅藻和纳米银颗粒治理城市污水

Pankaj Kumar Singh, Hirak S. Parikh, Abhishek Saxena, Bharti Mishra, Rashi Tyagi, Mukesk Kumar Awasthi, A. Madhavan, Raveendran Sindhu, Archana Tiwari
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引用次数: 0

摘要

近年来,废水修复已成为一个主要的环境问题,这促使科学家们寻找创新的可持续解决方案。硅藻已成为废水处理的潜在有效解决方案,这主要是因为硅藻具有非凡的吸收营养物质和参与新陈代谢过程的能力。本研究旨在实现两个目标:首先,利用海洋硅藻 Chaetoceros sp.和 Thalassiosira sp.研究表明,以 Thalassiosira sp.为介导的 AgNPs 在去除磷酸盐和硝酸盐方面非常有效,去除率分别为 74% 和 65%。相反,Chaetoceros sp.介导的 AgNPs 能显著降低 73% 的化学需氧量(COD)。此外,封装在 Ca-alginate 水凝胶珠中的 Thalassiosira sp:硝酸盐去除率为 64%,磷酸盐去除率为 91%,化学需氧量去除率为 78%。此外,两种硅藻包裹的藻酸盐珠的生化特征都很显著,这种方法显示出有效和可持续废水处理方法的潜力,可进一步研究其长期性能、可扩展性和对环境的可持续影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Managing municipal wastewater remediation employing alginate-immobilized marine diatoms and silver nanoparticles
Wastewater remediation has become a major environmental concern in recent years, which has led scientists to look for innovative sustainable solutions. Diatoms have emerged as a potentially effective solution for wastewater treatment, primarily because of their extraordinary ability to absorb nutrients and engage in metabolic processes. The present study aims to accomplish two goals, firstly, green synthesis of silver nanoparticles (AgNPs) utilizing marine diatoms Chaetoceros sp. and Thalassiosira sp. Secondly, encapsulation of diatoms within a Ca-alginate hydrogel bead developed via the gelation method thus introducing a novel way to assess their effectiveness in nutrient bioremediation from wastewater. The study reveals that Thalassiosira sp. mediated AgNPs are very effective in removing phosphate and nitrate, with 74% and 65% removal rates respectively. Conversely, Chaetoceros sp. mediated AgNPs significantly decreased chemical oxygen demand (COD) by 73%. Furthermore, Thalassiosira sp. encapsulated in Ca-alginate hydrogel beads demonstrated significant removal rates: 64% for nitrate, 91% for phosphate, and 78% for COD, respectively. Furthermore, the biochemical profiles of both diatom-entrapped alginate beads were remarkable, and the approach shows potential for effective and sustainable wastewater treatment methods, which can further be investigated for long-term performance, scalability, and environmental impact on sustainability.
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