Chemistry Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
Chemistry Department and LAQV-REQUIMTE, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
Environ Sci Pollut Res Int. 2024 Apr;31(19):28789-28802. doi: 10.1007/s11356-024-32741-z. Epub 2024 Apr 1.
The release of hazardous elements by industrial effluents to aquatic ecosystems is a potential threat to the environment. Chromium (Cr) is one of the elements whose levels in several freshwater ecosystems should be reduced to promote water reuse. In recent years, magnetic materials have gained increasing interest as sorbents because of their easy removal from treated water through magnetic separation. In this study, colloidal cobalt ferrite (CoFeO) particles were investigated as magnetic sorbents for chromium-aqueous chemical species. The oxidative stress responses of Mytilus galloprovincialis mussels exposed to 200 μg/L of Cr, resembling remediated water, were evaluated. More than 95% of Cr was removed from contaminated solutions by CoFeO aqueous suspensions at pH 6 and pH 10. The kinetics of sorption experiments were examined using pseudo-1st order, pseudo-2nd order and Elovich models to evaluate which mathematical model has a better adjustment to the experimental data. The present study revealed that the levels of Cr that remained in remediated water induced limited biochemical changes in mussels, being considered safe for aquatic systems. Overall, the use of cobalt ferrite-based sorbents may constitute a promising approach to remediate contaminated water.
工业废水向水生生态系统释放有害元素是对环境的潜在威胁。铬（Cr）是许多淡水生态系统中需要降低水平以促进水再利用的元素之一。近年来，由于磁性分离可从处理水中轻易去除，磁性材料作为吸附剂引起了越来越多的关注。在这项研究中，胶体钴铁氧体（CoFeO）颗粒被用作铬-水化学物种的磁性吸附剂。评估了暴露于类似于经修复水的 200μg/L Cr 中的贻贝（Mytilus galloprovincialis）的氧化应激反应。在 pH 6 和 pH 10 时，CoFeO 水悬浮液可去除受污染溶液中超过 95%的 Cr。通过拟一级、拟二级和 Elovich 模型来检查吸附实验的动力学，以评估哪个数学模型更适合实验数据。本研究表明，经修复水中残留的 Cr 水平在贻贝中引起的生化变化有限，对水系统是安全的。总体而言，使用基于钴铁氧体的吸附剂可能是修复受污染水的一种很有前途的方法。
