Adsorption of methyl orange on ZnO supported by seawater modified red mud | Zendy

Chun-Lei Qiao | Zendy; Yanming Xu | Zendy; Yue Yin | Zendy; Yuxing Xu | Zendy; Yihua Xiao | Zendy; Changqing Liu | Zendy

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Adsorption of methyl orange on ZnO supported by seawater modified red mud

Author(s) -

Chun-Lei Qiao,

Yanming Xu,

Yue Yin,

Yuxing Xu,

Yihua Xiao,

Changqing Liu

Publication year - 2022

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2022.102

Subject(s) - adsorption , seawater , methyl orange , red mud , orange (colour) , chemistry , zinc , chemical engineering , environmental chemistry , oceanography , geology , food science , organic chemistry , photocatalysis , engineering , catalysis

In this study, a novel adsorbent (SRM-ZnO) was prepared using zinc oxide supported on red mud in a seawater medium and was used for the adsorption of methyl orange (MO). It is expected to solve the recycling of red mud and prepare an economical adsorbent with high efficiency to adsorb dye wastewater. Material composition and morphology analyses showed that hydrotalcite compounds were attached on the surface of SRM-ZnO. The hydrotalcite compounds can increase the surface area of the modified red mud and thus increase the adsorption capacity of MO. The adsorption of MO dye on modified red mud conforms to the Temkin isotherm model and pseudo-second-order kinetic model. The adsorption behavior mainly includes physical interaction, supplemented with chemical interactions. Result also found that the adsorption of MO on SRM-ZnO is a spontaneous exothermic process.

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