Alkali‐Modified <i>Kalanchoe pinnata</i> Leaves as a Biosorbent for Sequestration of Crystal Violet Dye

ABSTRACT Nowadays, biosorbents derived from various plant parts have been explored for their ability to adsorb harmful dyes, such as Crystal Violet (CV). The aim of this work is to examine effect of activated Kalanchoe pinnata (KP) Leaf powder as biosorbents for the first time to eliminate CV dye from aqueous media. Initially, the alkali assisted Leaf powder of KP was subjected for various analysis such as Fourier transform infrared spectroscopy (FTIR), x‐ray diffraction (XRD), Brauner Emitt Teller (BET), and Scanning electron microscopy (SEM). The scope of work reveals a strong affinity towards cationic CV using biomass waste based alkali assisted biosorbent. The physicochemical properties, including equilibrium time, dye concentration, pH, and biosorbent dosage, have been investigated to determine the removal of CV from synthetic wastewater. The activated KP has been found very efficient at 0.1 g/100 mL at alkaline pH. The adsorptive removal of CV was found to be ∼96% using activated KP. An isotherm study suggested that the process follows the Langmuir model having regression coefficient ∼1, indicating that initially monolayer biosorption is occurring. The 4 cycles of regeneration reveal good reusability of the developed activated KP, and the results from real wastewater samples revealed that it can be a good candidate for implementation in real‐time applications.