Preparation of high-performance chitosan adsorbent by cross-linking for adsorption of Reactive Red 2 (RR2) dye wastewater

Li, Haojin; Liu, Miao; Zhao, Guangyao; Jia, Wenzhi; Zhu, Zhenchang

doi:10.1016/j.jece.2022.108872

Cited by 18 publications

(1 citation statement)

References 61 publications

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“…The adsorption of BR onto R/C-2HA4h adsorbent reached equilibrium (adsorption capacity: 72.83 mg/g) at the initial BR concentration of 200 mg/L, and the adsorption of MB onto R/C-2HA4h reached equilibrium (adsorption capacity: 61.39 mg/g) at the initial MB concentration of 150 mg/g. Beyond this concentration, the available adsorption sites are almost saturated, the adsorption amount no longer increases with increasing dye concentration [58]. For adsorption isotherm, the experimental data were fitted using Langmuir isotherm model and Freundlich isotherm model (Figure S5 in Supplementary Material) [59].…”

Section: Adsorption Kinetics and Isothermsmentioning

confidence: 99%

Carbon-in-Silicate Nanohybrid Constructed by In Situ Confined Conversion of Organics in Rectorite for Complete Removal of Dye from Water

He,

Qi,

Liu

et al. 2023

Nanomaterials

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The complete removal of low concentration organic pollutants from wastewater to obtain clean water has always been a highly desired but challenging issue. In response to this, we proposed a new strategy to fabricate a carbon-in-silicate nanohybrid composite by recycling dye-loaded layered clay adsorbent and converting them to new heterogeneous carbon-in-silicate nanocomposite through an associated calcination-hydrothermal activation process. It has been confirmed that most of the dye molecules were present in waste rectorite adsorbent using an intercalation mode, which can be in situ converted to carbon in the confined interlayer spacing of rectorite. The further hydrothermal activation process may further improve the pore structure and increase surface active sites. As expected, the optimal composite shows extremely high removal rates of 99.6% and 99.5% for Methylene blue (MB) and Basic Red 14 (BR) at low concentrations (25 mg/L), respectively. In addition, the composite adsorbent also shows high removal capacity for single-component and two-component dyes in deionized water and actual water (i.e., Yellow River water, Yangtze River water, and seawater) with a removal rate higher than 99%. The adsorbent has good reusability, and the adsorption efficiency is still above 93% after five regeneration cycles. The waste clay adsorbent-derived composite adsorbent can be used as an inexpensive material for the decontamination of dyed wastewater.

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Section: Adsorption Kinetics and Isothermsmentioning

confidence: 99%