Synthesis and characterization of arginine-doped heliotrope leaves with high clean-up capacity for crystal violet dye from aqueous media

Abstract

Novel an arginine-modified Heliotrope leaf (Arg@HL) was used as adsorbent for the crystal violet (CV) dye adsorption in a batch process. The physicochemical and morphological composition of Arg@HL were characterized by field-emission-scanning-electron-microscopy (FE-SEM), Fourier transforms infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC). The experiments were carried out to investigate the factors that influence the dye uptake by the adsorbent, such as the contact time under agitation, adsorbent amount, initial dye concentration, temperature and pH of dye solution. The optimum conditions of adsorption were found on the batch scale as followed: CV concentration of 20 mg·L−1, an amount of 0.75 g·L−1 of the adsorbent, 90 min contact time, 6 pH and 25 °C temperature for Arg@HL. The results confirmed a second-order model explaining the dye crystal violet's adsorption's kinetics by Arg-Heliotrope leaves. The Langmuir model effectively defines the adsorption isotherms. The results revealed that the Arg@HL has the potential to be used as a low-cost adsorbent for the removal of CV dye from aqueous solutions.

Adsorption of textile dyes from aqueous solutions onto clay: Kinetic modelling and equilibrium isotherm analysis

“…The calculated thermodynamic parameters are given in Table 3 . The calculated negative values of isosteric enthalpy and free energy changes for both dyes indicate that the adsorption process is spontaneous and exothermic ( Brini et al, 2021 ). It can also be seen from this table that the calculated isosteric adsorption entropy changes for both ionic dye adsorptions are relatively small and of opposite sign.…”

Recent Advancement in Rational Design Modulation of MXene: A Voyage from Environmental Remediation to Energy Conversion and Storage

“…The dyes are extensively employed in the different industrial sectors such as printing, paper and textile, and hence, become a major cause of environmental pollution. [446][447][448][449] Therefore, it an urgent need of hour to treat the dyes contaminated environment in a proper way. However, to achieve that aim, a large number of treatment methods have been employed.…”

A Targeted Review of Current Progress, Challenges and Future Perspective of g‐C3N4based Hybrid Photocatalyst Toward Multidimensional Applications

“…Dyes, as pigmented chemicals, are among the globe's largest significant contributors of water contamination [418,568–571] . These are often employed in the production and preparation of fabrics, rubber, foodstuff, pharmaceuticals, and various products [572–574] .…”

“…Dyes, as pigmented chemicals, are among the globe's largest significant contributors of water contamination. [418,[568][569][570][571] These are often employed in the production and preparation of fabrics, rubber, foodstuff, pharmaceuticals, and various products. [572][573][574] Different kind of plastic and related product contamination is also dangerous for the human health, which make their path from various agriculture ways and polluted water.…”