不同源在斯特鲁维特恢复期间对四环素迁移的影响
Lixia Qiu1, Degui Gao1, Chenghui Yan1
1Water Research Center, Tsinghua Shenzhen International Graduate School, Tsinghua, Shenzhen, 518055, China.
Journal of environmental management
|October 12, 2025
概括
这项研究表明,大尺寸合金是恢复 (P) 作为 struvite 的最佳来源,在最终产品中显著减少像四环素 (TC) 这样的抗生素残留物. 这种方法还可以降低成本,因为不需要调整pH值.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 可持续农业 可持续农业
背景情况:
- 斯特鲁维特结晶是从废水中回收的关键方法,产生有价值的肥料.
- 在回收的 struvite 中的抗生素残留物构成生态风险,需要对其减轻的研究.
- 不同 (Mg) 来源对斯特鲁维特恢复期间抗生素积累的影响尚不清楚.
研究的目的:
- 研究各种Mg来源,Mg剂量,废水盐度和四环素 (TC) 度对 struvite 生产的影响.
- 分析在回收过程中中struvite晶体中TC的迁移行为和积累.
- 确定最佳条件和Mg来源,以最大限度地减少回收 struvite 中的抗生素残留物.
主要方法:
- 系统评估不同的Mg来源:MgCl2,MgO,小尺寸Mg合金和大尺寸Mg合金.
- 有控制的实验改变了Mg剂量,废水盐度和初始TC度 (20和200μg/L).
- 在得到的斯特鲁维特晶体中量化PO43−-P回收效率和TC含量.
主要成果:
- 回收效率因源而异,从7.28% (小型合金) 到98.81% (MgCl2) 有显著差异.
- 斯特鲁维特中的TC含量与初始TC度正相关,并受到Mg来源和盐度的影响.
- 大尺寸的Mg合金导致TC含量最低 (2.4553.04μg/g在200μg/LTC) 并消除了pH调整的需要.
结论:
- 合金,特别是大尺寸的合金,是 struvite 恢复的非常有前途的来源,最大限度地减少了抗生素污染.
- 选择Mg源对回收效率和四环素的共同沉都产生了重大影响.
- 使用Mg合金提供了一种具有成本效益和环境安全性的方法,用于从牲畜废水中回收.
更多相关视频
14:49Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro
Published on: April 15, 2022
5.6K
17:35A Microplate Assay to Assess Chemical Effects on RBL-2H3 Mast Cell Degranulation: Effects of Triclosan without Use of an Organic Solvent
Published on: November 1, 2013
40.5K
相关概念视频
01:30Urinary Tract Calculi III: Medical Management
194
The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
194
01:30EDTA: Direct, Back-, and Displacement Titration
5.3K
The EDTA titration types for metal ion analysis include direct titration, back-titration, and replacement titration.
Direct titration involves buffering the metal ion solution to the desired pH and directly titrating with standard EDTA until the endpoint. The optimum pH ensures a large conditional formation constant of metal−EDTA and visibility of the free indicator color in the solution. In addition, auxiliary complexing reagents are used to prevent the precipitation of metal hydroxides...
Direct titration involves buffering the metal ion solution to the desired pH and directly titrating with standard EDTA until the endpoint. The optimum pH ensures a large conditional formation constant of metal−EDTA and visibility of the free indicator color in the solution. In addition, auxiliary complexing reagents are used to prevent the precipitation of metal hydroxides...
5.3K