Cobalt Ferrite Incorporated Ocimum sanctum Nanocomposite Matrix as an Interface for Adsorption of Organic Dyes: A Sustainable Alternative

Abstract

The preparation of Cobalt ferrite-Ocimum sanctum nanocomposite, referred to as CoFe 2 O 4 /OS, has been reported along with its application for the treatment of water containing hazardous organic contaminants. A simple co-precipitation approach was applied for synthesis of magnetic nanocomposite, and a thorough analysis for its characterization was conducted using several spectroscopic and microscopic techniques. The characterization results showed that the magnetic nanocomposite exhibited substantial functional groups of Ocimum sanctum powder and magnetic ferrite part. The adsorption investigation of nanocomposite for removal of two cationic dyes was carried out with varying parameters, such as pH, contact time, temperature, concentration, and composite dosage. The sorption process was proved feasible and exothermic at the tested temperatures (303-323 K). The sorption data followed Freundlich and Temkin isotherms which recommended the physisorption progression. The kinetic study revealed a pseudo-second order rate of sorption process for both dye molecules. The facile preparation, economical cost, significant magnetic character, and high sorption capacity will surely construct the water treatment system more competent with the use of CoFe 2 O 4 /OS.

A Sustainable Approach for Enhancing Cationic Dyes Adsorption in Single and Multiple Systems using Novel Nano Ferrites Modified with Walnut Shell

“…The pH was adjusted from 3 to 11 having fixed initial dye concentration (50 mg/L) and adsorbent dosage 0.1 g. All the flasks were placed in shaker at 110 rpm for an equilibrium time of two hrs. Figure 9 shows the effect of pH on the removal of dyes [42–44] . It was observed that the dye‘s removal efficiency increased gradually as the pH of the solution increased and reached maximum at pH 7 before decreasing further.…”

“…Figure 9 shows the effect of pH on the removal of dyes. [42][43][44] It was observed that the dye's removal efficiency increased gradually as the pH of the solution increased and reached maximum at pH 7 before decreasing further. The maximum removal percent at pH 7 for MG and MB was 91.4 %, 93.6 % respectively.…”

Enhanced removal of organic dyes from aqueous solutions by new magnetic HKUST-1: facile strategy for synthesis

“…The values of Ln q e versus Ln C e were plotted for the Freundlich isotherm. Equations ( 2 ) and ( 3 ) express the linear form of Langmuir and Freundlich isotherms, respectively: where C e (mg L −1 ) represents the equilibrium concentration of MG, CV, and MB; q e (mg g −1 ) is the equilibrium adsorption capacity; q max (mg g −1 ) is the maximum adsorption capacity; K L (L mg −1 or L mol −1 ) is Langmuir constant represents the adsorption energy and K F and n are the Freundlich constants 29 . Figure 5 and Table 4 show Langmuir and Freundlich isotherm diagrams and results for MG, CV, and MB.…”

Tuning the surface functionality of polyethylene glycol-modified graphene oxide/chitosan composite for efficient removal of dye

“…Commercially available sorbents must be recyclable and capable of several reuses to remain cost competitive 69 . For this purpose, additional studies were conducted using 1.5% PEG-GO/CS for up to three cycles under optimal conditions.…”