In the present work, self-cleaning membranes of ionic liquid-grafted poly(vinylidene fluoride) (PVDF) polydopamine-coated TiO were prepared through a nonsolvent-induced phase separation method. PDA facilitates the uniform dispersion of TiO nanoparticles in PVDF substrates; meanwhile, TiO@PDA core-shell particles and the hydrophilic IL improve the hydrophilicity of PVDF membranes and contribute to the increased average pore size and porosity, significantly improving the pure water permeation flux and dye wastewater flux (the water flux increased to 385.9 Lm h). In addition, the combined effect of the positively charged IL and the strongly viscous PDA shell layer enhanced the retention and adsorption of dyes so that the retention and adsorption rates of both anionic and cationic dyes were close to 100%. Notably, the hydrophilic PDA allowed more TiO to migrate to the membrane surface during the phase transition; on the other hand, dopamine could promote photodegradation. Therefore, the combined two factors for TiO@PDA were beneficial to the ultraviolet-catalytic (UV-catalytic) degradation of dyes on the surface of the membrane, leading to >80% degradation rates of various dyes. Thus, the high-efficiency and easy-to-operate wastewater treatment technology provides attractive potential for dye removal and resolution of membrane contamination.
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http://dx.doi.org/10.1021/acs.langmuir.3c00175 | DOI Listing |
Bioresour Technol
December 2024
Department of Biotechnology, Sathyabama Institute of Science and Technology, Deemed to be University, Chennai 600 119, Tamil Nadu, India.
This study investigates the potentials of Chlorococcum humicolo algal biomass for the extraction of valuable biochemical and biodiesel production, with focus on the phycoremediation of textile dye effluents. The alga was cultivated in three media: CFTRI medium, combined dye effluent, and dye bath effluent in the laboratory. The highest cell count (254 × 10 cells/ml) and lowest oil content (16.
View Article and Find Full Text PDFBioresour Technol
December 2024
School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310000, PR China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, PR China.
This study introduces a technique utilizing natural pyrrhotite powder as a nucleating agent in four sequencing batch reactors (SBRs) for the treatment of dye wastewater. Through analysis of various factors including pH, pyrrhotite surface free energy, sludge zeta potential, and shifts in microbial communities, the mechanism by which pyrrhotite facilitates the formation of aerobic granular sludge (AGS) is elucidated. Over 140 days of continuous operation under neutral conditions, natural pyrrhotite rapidly cultivated AGS under neutral conditions.
View Article and Find Full Text PDFJ Environ Manage
December 2024
Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt. Electronic address:
The discharge of untreated dye waste from various industrial sectors into wastewater poses significant environmental and health risks. This study presents an innovative approach by developing a cost-effective and eco-friendly hybrid mesoporous nanocomposite, silver nanoparticles@mesoporous mango peel-derived carbon (AgNPs@MMC), synthesized from agricultural waste (mango peels) and urban waste (X-ray film waste). The core objectives of this work are: (i) recycling agricultural and urban waste to produce valuable materials; (ii) achieving effective removal of methyl violet 10B (MV10B) through simultaneous adsorption and photocatalytic degradation; and (iii) evaluating the antimicrobial properties of the developed material.
View Article and Find Full Text PDFLangmuir
December 2024
Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University (PDEU), Gandhinagar 382426, Gujarat, India.
Numerous corporations have overlooked environmental regulations concerning wastewater treatment, leading to a worldwide issue regarding hazardous pollutant discharge, particularly dyes and heavy metal ions, into river sources. Various industries, with water, energy, and biological sectors, actively employ membranes. Membranes capable of showing flux, metal and dye sorption, and catalysis have been developed and are extensively used by functionalizing the pores of ultrafiltration, microfiltration, and nanofiltration membranes with responsive properties.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Center of Excellence for Innovation in Chemistry, Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, 90110, Songkhla, Thailand.
CrO/g-CN photocatalyst was successfully synthesized via the one-pot thermal polycondensation method by mixing different ratios of CrCl.HO and thiourea. Thiourea was used as the precursor for building g-CN.
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