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了解水中的特定微塑料和有毒染料"刚果红"之间的相互作用

Kannan Nadarajah¹, Yanushiya Jeganathan¹, Shri Lasha Ramakrishnan¹

¹Department of Agricultural Engineering, Faculty of Agriculture, University of Jaffna, Sri Lanka.

|January 25, 2025

概括

微塑料 (MP) 有效地吸附刚果红色染料,高密度聚乙烯 (HDPE) 显示最高容量. 国会议员充当载体,吸附并可能释放污染物,突出显示了环境的双重风险.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

微塑料 (MP) 是新兴的环境污染物.
国会议员可以吸附各种有机污染物,包括染料.
了解MP污染物相互作用对于环境风险评估至关重要.

研究的目的:

为了研究刚果红 (CR) 染料对不同类型的MPs的吸附.
为了确定选定的MP的吸附机制和动力学.
评估MPs作为CR染料携带者的潜力.

主要方法:

在HDPE,PVC,LDPE,PP和PET上选CR吸附.
对HDPE和PVC进行了详细的吸附实验 (异温,动力).
福里埃变换红外光谱 (FTIR) 用于表面分析.
优化吸附条件 (pH,温度,剂量).

主要成果:

在CR中,HDPE具有最高的初始吸附能力 (21.90 mg/g).
HDPE吸附遵循弗洛伊德利希模型和班哈姆动力学 (毛孔填充).
聚乙烯吸附遵循雷德利希-彼得森模型和伪二阶动力学 (化学吸附).
HDPE 的最大吸附能力 (qmax) 为 110.1 mg/g,而 PVC 的最大吸附能力为 8.1 mg/g.
吸附的最佳pH值为HDPE的5和PVC的4.

结论:

众议员,特别是HDPE,是CR染料的有效吸附剂.
在HDPE (物理吸附/孔隙填充) 和PVC (化学吸附) 之间,吸附机制不同.
国会议员通过吸附和可能释放污染物构成双重环境威胁.
建议在现实条件下进一步研究MP溶解.

关键词:

吸附方式吸附方式吸附方式刚果红色染料刚果红色染料互动互动互动互动机理机制机理机制微塑料是一种微塑料.水水水水水,这是一个很好的方法.

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