We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Performance Evaluation of Hybrid and Conventional Coagulants for the Removal of Sunset Yellow and Methylene Violet Dyes from Wastewater
Summary
This study evaluated hybrid coagulants combining chitosan and polysilicate acid with aluminum salts for removing Sunset Yellow and Methylene Violet dyes from textile wastewater, finding that hybrid formulations achieved higher removal efficiency than conventional aluminum coagulants alone.
Textile industries release dyes into wastewater, and when present above certain levels, these dyes pose serious risks because of their high toxicity. This study investigates the removal of Sunset Yellow (SY) and Methylene Violet (MV) dyes from wastewater using chitosan (CS) and polysilicate acid (pSi) in the structure of aluminum-based coagulants, resulting in hybrid formulations (CS@Al, Al/pSi, and CS@Al/pSi). Among the various treatment methods that have been applied for the removal of dyes, the coagulation/flocculation process was chosen in the present study, as it is a cheap and effective method. Coagulation performance was optimized for pH, coagulant dosage, temperature and mixing time. The Al/pSi coagulant achieved nearly complete SY removal (98.8%) at 25 mg/L dosage and pH 3.0. MV removal in single-dye solutions was limited, with Al/pSi achieving only 26.6% removal at pH 3.0. However, in mixed-dye systems (SY/MV), synergistic interactions increased MV removal up to 94.4% and SY removal to 100%. Hybrid CS@Al/pSi showed lower SY removal (36.4%) for SY at 50 mg/L but provided stable floc formation, particularly in mixtures of anionic and cationic dyes. Application to real textile wastewater confirmed the high efficiency of the optimized coagulants, particularly with Al/pSi20,A and AlCl3, indicating their potential for industrial wastewater treatment. SEM, EDS, XRD, and FTIR analyses revealed structural consolidation, increased surface area, and successful dye adsorption, explaining the high removal efficiency.
Sign in to start a discussion.
More Papers Like This
Green and Eco-Friendly Treatment of Textile Wastewater by Using Azadirachta indica Leaf Extract Combined with a Silver Nitrate Solution
Textile industry wastewater was treated using combinations of Azadirachta indica (neem) leaf extract and synthetic coagulants in two case studies, evaluating color and pollutant removal efficiency. The green coagulant combination showed effective performance, supporting its use as an eco-friendly supplement to conventional textile wastewater treatment.
Synergistic removal of microplastic fibres using hybrid pre-treatment: evaluation of Chitosan as a green coagulant
Researchers evaluated the capacity of existing water treatment pre-treatment methods to remove microplastic fibers and investigated chitosan — a low-molecular-weight, 75-85% deacetylated green coagulant — as an alternative to conventional chemical coagulants. The study assessed a hybrid pre-treatment approach, finding synergistic microplastic fiber removal efficiency when chitosan was combined with existing processes.
Effect of coagulation on microfibers in laundry wastewater
Researchers tested ferric chloride and polyaluminium chloride (PACl) as coagulants for removing synthetic microfibers from laundry wastewater, finding that surfactants in detergent reduced removal efficiency from up to 96% to 0-37%. Adding PACl restored removal to above 90%, with optimal PACl concentrations dependent on detergent concentration, suggesting coagulant addition is critical for effective microfiber removal from laundry effluent.
Enhanced removal of microplastic fibres using aluminium and chitosan-based coagulants assisted with microbubble technology
Researchers tested the removal of microplastic fibers from water using aluminium-based and chitosan-based coagulants combined with sedimentation and microbubble flotation techniques. The aluminium coagulant achieved the highest removal rate of 88% through sedimentation in humic acid-containing water, while chitosan achieved 78% removal using microbubble flotation at a lower dosage. The findings suggest that the natural coagulant chitosan has potential as an effective and greener alternative for microplastic fiber removal in water treatment.
Efficiency of Coagulation/Flocculation for the Removal of Complex Mixture of Textile Fibers from Water
Researchers tested coagulation and flocculation for removing a mixture of synthetic and natural textile fibers from water, finding that the presence of natural fibers significantly affected removal efficiency compared to single-fiber studies, which has practical implications for wastewater treatment.