Adsorption of Brilliant Scarlet 3R by Natural Diatomite

Shaohua He, Zhipan Gu, Jing Liu, Shuibo Xie
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引用次数: 0

Abstract

The adsorption of acid dyes by diatomite was investigated using Brilliant Scarlet 3R (NSK). Adsorption of this textile dyes onto diatomite earth sample was studied by batch adsorption techniques at varying temperatures 298K, 309K, 318K, 328K. The adsorption behavior of textile dye on diatomite samples was investigated using a UV–vis spectrophotometric technique. The adsorption processes follow the pseudo second–order model, and adsorption coverage over the surface of diatomite was studied using two well-known isotherm models: Langmuir’s and Freundlich’s. These results suggest that the dye adsorption isotherms fit well to Freundlich and Langmuir equation. The Freundlich equation 1/n between 0.3636 and 0.879 indicates favorable adsorption. The main driving forces of adsorption are electrostatic attraction and van der waals force. These results show that natural diatomite holds great potential to remove textile dyes from wastewater.
天然硅藻土对大红3R的吸附研究
用大猩红3R (NSK)对硅藻土吸附酸性染料进行研究。在298K、309K、318K、328K不同温度条件下,采用间歇吸附技术研究了该纺织染料在硅藻土样品上的吸附性能。纺织染料的吸附行为在硅藻土样本研究用紫外可见光谱光度测量的技术。吸附过程遵循伪二阶模型,吸附表面覆盖的使用两个著名的等温线模型研究了硅藻土:朗缪尔和弗伦德里希。这些结果表明染料吸附等温线符合Freundlich和Langmuir方程。Freundlich方程1/n在0.3636 ~ 0.879之间表示吸附良好。吸附的主要驱动力是静电吸引和范德华力。这些结果表明,天然硅藻土在去除纺织废水中的染料方面具有很大的潜力。
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