Agro‐Waste Applications for Bioremediation of Textile Effluents

Kiran, Shumaila; Ahmad, Tanvir; Gulzar, Tahsin; Ashraf, Asma; Naqvi, Syed Ali Raza; Naz, Saba

doi:10.1002/9781119620532.ch18

Cited by 3 publications

(1 citation statement)

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“…Several researchers have used waste material to remove dyes from textile wastewater. For instance, Kiran et al (2020) used agro-industrial waste (palm date stones) to adsorb basic violet 3 and basic red 2 from textile wastewater with high removal efficiency (77%-basic red 2, 93% basic violet 3). Wong et al (2020) used coffee waste modified with polyethyleneimine to adsorb dye from textile wastewater with an adsorption capacity of 34.36 mg g À1 (Congo red) and 77.52 mg g À1 (reactive black 5).…”

Section: Introductionmentioning

confidence: 99%

Investigation on the feasibility of recycled polyvinylidene difluoride polymer from used membranes for removal of methylene blue: experimental and DFT studies

Patel

Raj

Chaubey

et al. 2022

Water Science and Technology

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This study reports the feasibility of recycled polyvinylidene difluoride (PVDF) beads to decolourize the methylene blue (MB) from aqueous streams. The beads were characterized using scanning electron microscopy (SEM), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT-IR) for its morphological and structural analysis. The effect of various process parameters such as adsorbent dose, initial concentration, contact time, and pH was studied. The first principle density functional theory (DFT) calculations were performed to investigate the underlying mechanism behind the adsorption process. The MB dye adsorption on recycled PVDF beads followed the pseudo-second-order kinetics and Langmuir isotherm, indicating the adsorption was chemical and monolayer. The maximum adsorption capacity obtained was 27.86 mg g−1. The adsorption energy of MB-PVDF predicted from the DFT study was –64.7 kJ mol−1. The HOMO-LUMO energy gap of PVDF decreased from 9.42 eV to 0.50 eV upon interaction with MB dye due to the mixing of molecular orbitals. The DFT simulations showed that the interaction of the MB dye molecule was from the electronegative N atom of the MB dye molecule, implying that electrostatic interactions occurred between the recycled PVDF beads and the positively charged quaternary ammonium groups in MB dye. The present study demonstrates the potential of recycled PVDF beads for a low-cost dye removal technique from textile wastewater.

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Section: Introductionmentioning

confidence: 99%