在水环境中从微塑料中释放的酸,以及它们在单次和竞争性吸附之间进行的比较
Furong Zhang1, Hui Chen1, Yuxuan Liu1
1School of Environmental Science and Engineering, Changzhou University, No. 21, Gehu Middle Road, Wujin District, Changzhou, 213164, China.
Environmental science and pollution research international
|November 3, 2023
概括
环境因素显著影响微塑料 (MP) 中的甲酸乙烯释放. 聚烯MP释放的最多的二2-乙烯基甲酸盐,随着pH值的增加,释放量会减少.
科学领域:
- 环境科学 环境科学
- 聚合物化学 聚合物化学
- 生态毒理学 生态毒理学
背景情况:
- 众所周知,微塑料 (MP) 可以吸附污染物,但它们释放固有的添加剂的能力不太清楚.
- 酸 (PAE) 是塑料中常见的添加剂,在释放时具有潜在的环境风险.
研究的目的:
- 研究环境因素对聚乙烯 (PE-MPs),聚烯 (PP-MPs) 和聚烯 (PS-MPs) 中PAE释放的影响.
- 在不同的条件下,检查PAE在不同MP的吸附行为.
主要方法:
- 在不同的pH值,离子强度和有机物度下,模拟水环境测试PE-MP,PP-MP和PS-MP的PAE释放.
- 使用伪二阶模型分析释放动力学,使用弗洛伊德利希模型分析吸附同热量.
- 研究了多种PAE的竞争性吸附效应.
主要成果:
- 环境因素显著影响了二二乙基甲酸盐 (DEHP) 的释放;所有PAE的pH值较高,释放量减少.
- 在综合因素下,PP-MP对环境变量 (离子强度>有机物质>pH) 的敏感度最高.
- 在PS-MP中,DEHP释放率最高 (0.058微克/升),其次是PP-MP (0.038微克/升) 和PE-MP (0.035微克/升).
- 竞争性吸附增加了DEHP吸附,但降低了双甲酸盐 (DBP) 和双甲酸盐 (DIBP) 的吸附.
结论:
- MP类型和环境条件极大地影响PAE添加剂的释放.
- 这些发现有助于预测微塑料在各种水生环境中释放的有毒添加剂.
更多相关视频
05:48Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use
Published on: July 24, 2021
5.6K
06:46Collection of Alfalfa Root Exudates to Study the Impact of Di2-ethylhexyl Phthalate on Metabolite Production
Published on: June 2, 2023
1.8K
相关概念视频
Plasticizers
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
