Kinetic study for removal of cationic hexamethyl pararosaniline chloride dye using phytoremediation

• Published in: Environmental science and pollution research international 2023-08, Vol.30 (39), p.91292-91299
• Main Authors: Jothilingam, Sivapriya, Manickam, Naveenkumar, Paramasivam, Ravichandran
• Format: Article
• Language: English
• Subjects: Adsorption; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Biodegradation, Environmental; Chloride; Chlorides; Color removal; Decoloring; Decolorization; Dyes; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Functional groups; Gentian Violet; Hydrogen-Ion Concentration; Kinetics; pH effects; phytoaccumulation; Phytoremediation; Research Article; Salvinia molesta; Textile industry wastewaters; textile mill effluents; Tracheophyta; Waste Water Technology; Wastewater; Wastewater treatment; Water Management; Water Pollutants, Chemical - analysis; Water Pollution Control
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-023-28774-5

The present investigation provides a kinetic study for the removal of hexamethyl pararosaniline chloride, a hazardous dye, by phytoremediation using a water plant. It reveals Salvinia molesta has a phytoremediation tendency. The ability of Salvinia molesta to remove crystal violet (CV) dye is investigated with kinetic study in this research. Phytoremediation is done for different concentrations of hexamethyl pararosaniline chloride with varying pH and weight of Salvinia molesta Mitchell. About 88% of hexamethyl pararosaniline chloride has been decolourised from 50 mg L −1 solution at pH of 6 with 4 g of Salvinia molesta Mitchell. The results obtained for hexamethyl pararosaniline chloride removal at pH of 6 are studied for pseudo-first order, pseudo-second order and Elovich kinetics. The resulting curve for removal of hexamethyl pararosaniline chloride indicates that phytoremediation process follows pseudo-second order kinetics with correlation value R 2 ≥ 0.985. The Salvinia molesta used at pH 6 has been reused and the decolourisation has been achieved at about 84% for 50 mg L −1 solution of CV dye. The FTIR results reveal the phytoextraction of CV in the roots by interaction of functional groups. From the experimental results, Salvinia molesta Mitchell can be used to treat textile wastewater and wet land.