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通过使用热透镜光谱学测定带有氧化石墨烯纳米粒子的聚合物膜吸附六价的效率

A Sánchez-Cepeda¹, E Cedeño², R Zuleta²

¹Facultad de Ciencias Básicas, Escuela de Posgrados, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avda. Central del Norte, Vía Paipa, 150001, Tunja, Boyacá, Colombia.

|February 6, 2026

概括

热透镜光谱 (TLS) 精确量化Cr (VI) 和监测石墨烯氧化物膜.

科学领域:

环境科学环境科学
分析化学分析化学
材料科学材料科学材料科学

背景情况:

热透镜光谱 (TLS) 是一种敏感的,非破坏性的光热技术,用于分析吸光物质.
(VI) 是一种有毒的污染物,需要有效的检测和清除方法.
基于氧化石墨烯 (GO) 的膜显示出水处理的前景.

研究的目的:

实施和验证双光束TLS系统,以实时监测GO膜的Cr(VI) 吸附.
为了比较两种类型的GO膜的吸附性能:一种是通过改性Hummers方法合成的,另一种是用表面活性剂改性商业GO.
在连续流条件下评估这些膜的吸附动力学和效率.

主要方法:

使用了一种双光束TLS设置,用于聚焦和聚合探头光束的同轴传播.
在532nm使用Cr (VI) -1,5-二甲化合物复合物量化Cr (VI) -1,5-二甲化合物,建立了校准曲线 (0-5 mg L-1),检测极限为293μg L-1 .
在使用基于GO的聚合物膜的连续流过实验中,从微量量 (200μL) 中获得了时间解析的吸附曲线.

主要成果:

合成和商业GO膜都表现出Cr(VI的快速吸附,在20-35分钟内达到平衡.
与合成膜相比,表面活性剂修饰的商业GO膜显示出更快的平衡和更强的吸附性能.
吸附动力学由伪第一阶模型和伪第二阶模型描述得很好,提供了一致的性能指标.

结论:

TLS是一种敏感且资源高效的方法,用于实时监测吸附动力学和去除效率.
该研究成功地特征和优化了基于GO的聚合物膜,用于水处理.
这些发现突出了功能化的GO膜在连续流系统中有效的Cr(VI) 清除的潜力.

关键词:

连续流量吸附持续流量吸附石墨烯氧化物膜石墨烯氧化物膜六价去除法六价去除法热透镜光谱学热透镜光谱学

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