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使用Fe-Mn生物炭过柱去除硫甲醇:同时存在的聚烯微塑料的影响

Jinsheng Huang¹, Andrew R Zimmerman², Yongshan Wan³

¹Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA.

Journal of cleaner production

|February 28, 2025

概括

Fe-Mn修饰生物炭有效地去除水中的硫甲醇 (SMX) 抗生素. 然而,微塑料 (MPs) 干扰了SMX的去除,特别是在更高的pH水平下,影响了废水处理策略.

科学领域:

环境科学环境科学
水处理技术水处理技术
材料科学材料科学材料科学

背景情况:

新兴的污染物如抗生素和微塑料 (MP) 构成重大环境和废水处理挑战.
硫甲醇 (SMX) 是一种常见的抗生素污染物,聚烯微塑料 (PS-MPs) 在水生环境中普遍存在.
基于生物炭的材料正在被探索以去除污染物,但在MPs等共污染物的存在下,它们的有效性需要调查.

研究的目的:

在固定床过系统中使用Fe-Mn修饰生物炭 (BFM) 评估硫甲 (SMX) 的去除效率.
研究聚烯微塑料 (PS-MPs) 在不同pH条件下 (水和废水) 对SMX去除效率的影响.
阐明控制SMX和PS-MP相互作用的机制及其对废水处理的影响.

主要方法:

进行了批量吸附实验,以确定SMX被BFM去除.
进行了固定床柱过研究,以评估SMX和PS-MP的去除.
应用了床深服务时间和Yan模型来分析柱子性能和吸附机制.
在合成水 (pH≈5.6) 和模拟废水 (pH≈8) 中进行了实验,其中SMX和PS-MPs的度各不相同.

主要成果:

在批量测试中,BFM证明了10mg/LSMX的完全去除.
模型表明外部质量转移和粒子内部扩散是占主导地位的SMX吸附机制.
由于竞争性吸附,PS-MPs的存在显著减少了SMX在合成水中的保留,特别是在中性pH下.
在pH3.2时,静电相互作用促进了PS-MP吸附,减少了与SMX的竞争.
升高的pH值加剧了PS-MP和SMX之间的吸附竞争.
在废水中,PS-MPs稍微抑制了SMX过,但由于高离子强度和性pH,它们有效地被自己去除.

结论:

Fe-Mn改性生物炭是连续流系统中SMX去除的一个有前途的材料.
微塑料显著干扰过系统中的抗生素去除,pH值是影响这些相互作用的关键因素.
了解这些相互作用对于优化基于生物炭的废水处理策略至关重要,以解决同时出现的污染物.

关键词:

批量吸附方式批量吸附方式生物炭是一种生物炭.固定床柱过器固定床柱过器微塑料是一种微塑料.硫胺抗生素是一种抗生素.污水处理污水处理污水处理

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