Decolourization of noxious safranin-T from waste water using Mangifera indica as precursor
- PDF / 1,901,293 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 3 Downloads / 154 Views
ORIGINAL ARTICLE
Decolourization of noxious safranin‑T from waste water using Mangifera indica as precursor Deepak Pathania1,2 · Sunil Dhar2 · Arush Sharma3 · A. K. Srivastava4 Received: 7 August 2020 / Revised: 1 September 2020 / Accepted: 15 September 2020 © Society for Environmental Sustainability 2020
Abstract Bark prepared from Mangifera indica has been employed for eradication of safranin-T. Structural analysis of bark was attempted using Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The effect of several parameters was tested and optimized. The percentage adsorption of dye onto bark was found to increase with temperature and dictate endothermic adsorption. About 87% of dye removal was found at contact time of 80 min. The percentage of safranin-T dye removal increased with adsorbent dosage. Different isotherms like Langmuir, Freundlich, and Tempkin were studied to determine the adsorption mechanism. The adsorption capacity of bark was recorded to be 78.96 mg/g. Langmuir model rightly described the adsorption process with higher regression value (R2 = 0.99). The experimental data was found close to using Langmuir isotherm. This confirms the monolayer adsorption of safranin-T dye onto bark. The kinetic study and intra-particle diffusion described that adsorption followed the pseudo-second-order kinetics with greater R 2 value. The study confirmed the chemical adsorption of dye onto adsorbent. The different thermodynamic processes confirmed the feasible, spontaneous and endothermic adsorption of dye using M. indica bark.
* Deepak Pathania [email protected] 1
Department of Chemistry, Sardar Vallabhbhai Patel Cluster University, Mandi, Himachal Pradesh 175001, India
2
Department of Environmental Science, Central University of Jammu, Bagla (Rahya‑Suchani), Samba, Jammu and Kashmir 181143, India
3
Department of Chemistry, BUEST, Solan, Himachal Predesh 173205, India
4
Faculty of Engineering and Technology, Veer Bahadur Singh Purvanchal University, Jaunpur, Uttar Pardesh 222003, India
13
Vol.:(0123456789)
Environmental Sustainability
Graphic abstract
Keywords Bark · Mangifera indica · Safranin-T · Adsorption · Models
Introduction Due to growth in industrialization, the environment and resources are being seriously affected by the discharge of untreated effluents. This is also causing the scarcity of water resources and environmental contamination, which utterly affect the flora and fauna. Water pollution has been caused by dyes, heavy metals, pesticides, released by the industries (Chaudhari et al. 2017; Affam et al. 2018; Shvadchina et al. 2013). Components such as acids or bases, toxic compounds, coloring pigments, dissolved and suspended solids (of dyes) cause severe environmental pollution. Among all these pollutants, color is visible and most harmful to life. Dyes made by chemical methods are mostly employed in various industrial and agricultural sectors (Kanagaraj et al. 2015; Rovira et al. 2019; Maki
Data Loading...
