4.6 Article

Cationic and Anionic Dye Adsorption on a Natural Clayey Composite

期刊

APPLIED SCIENCES-BASEL
卷 11, 期 11, 页码 -

出版社

MDPI
DOI: 10.3390/app11115127

关键词

clayey composite; adsorption isotherm; adsorption kinetic; anionic dye adsorption; dye adsorption; basic navy blue 2RN; cationic dye adsorption; drimaren yellow CL-2R

向作者/读者索取更多资源

The study showed that the adsorption of dyes on red clay is influenced by factors such as pH, dye concentration, and adsorbent concentration. The adsorption mechanisms for CNB and ADY are chemisorption and physisorption, respectively.
One of the main challenges for environmental sciences today is the effective treatment of dye-laden industrial effluents. This work aimed to study the potential of an untreated (natural occurring clayey composite) red clay (RC) for the adsorption of a cationic dye Basic Navy Blue 2RN (CNB) and anionic dye Drimaren Yellow CL-2R (ADY). We evaluated the effect of pH, dye concentration, and adsorbent concentration on the removal effectiveness to study the absorption process. Also, we studied the adsorption process by analyzing the feasibility of several known adsorption isotherms and kinetic models. The results show that at a pH of less than 4, the CNB and ADY removal percentages were 97% and 96%, respectively. At a pH greater than 8, the CNB and ADY removals were 75% and 25%, respectively. The CNB adsorption happened by chemisorption of a monolayer on iron-containing particles (IPs). In congtrast, the ADY adsorption occurred by monolayer physisorption on kaolinite particles (KPs) and Na, K-rich Laumontite particles (LPs). The Langmuir isotherm model fits very well with CNB experimental data. The Temkin model shows the best fit between the isotherm function and the ADY dye-adsorption data. The pseudo-second-order kinetic model fits the CNB and ADY dye-adsorption data on RC particles. The heterogeneous composition of naturally occurring clay favors different adsorption mechanisms and opens an avenue for the separation process's engineering.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据