Enhanced removal of antimony in dyeing wastewater by mixing Fe₃O₄ with manganese sand filter material

Abstract

Wastewaters from the printing and dyeing industries contain many contaminants in particular antimony (Sb) that end up in the environment. Both manganese sand filter and Fe 3 O 4 have good removal effect on Sb, and are cheap and easy to obtain. We made a filter material by mechanically mixing the manganese sand filter material and ferro-ferric oxide (Fe 3 O 4). The Fe-Mn oxide filter material was analyzed by X-ray diffraction. We studied the filtration of real wastewater from a dyeing wastewater resource recovery facility in Suzhou, China, containing Sb at high concentration of 410 μg/L, using dynamic tests in adsorption columns during 7 days. We tested the effects of filter material volume filling ratio, the empty bed contact time (EBCT), pH, and back washing on the removal of Sb. Results show that the addition of Fe 3 O 4 enhanced the removal of Sb, reaching 85% of initial Sb. When the initial influent pH of the raw water is 3.0, the volume filling ratio of filter material is 60%, the EBCT is 20 min, and the developed dynamic Fe-Mn oxide filter has the best removal effect on Sb. Daily back washing of the filter keeps a Sb removal rate of about 80%. © 2020 Water Environment Federation • Practitioner points • A novel and cheap Fe-Mn oxide was developed for Sb removal from dyeing wastewater. • A self-designed filter device was designed to verify performance of the low-cost material. • Optimal design and operational parameters of the filtration process were determined.

Green Synthesis of Zinc Oxide Nanoparticles Using Aqueous Extracts of Hibiscus cannabinus L.: Wastewater Purification and Antibacterial Activity

“…The crystalline properties, elemental composition, and structure of the synthesized nanoparticles were analyzed using various characterization techniques, including X-ray diffraction (XRD), UV-Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray analysis (EDAX). The presence in dyeing wastewater of azo dye compounds, which are extensively utilized synthetic dyes, poses a significant threat to human health and aquatic organisms due to these compounds' carcinogenic properties [19]. Moreover, the aromatic structure of azo dyes presents challenges in terms of their degradation, leading to prolonged environmental pollution [20].…”

Editorial: Surmounting challenges in natural and engineered water systems

“…One compared two hydroxyl radical and sulfate radical‐based AOPs for degradation of Acid Red 14 (Samarghandi, Dargahi, Zolghadr Nasab, Ghahramani, & Salehi, 2020), while the other reported the immobilized Pseudomonas guariconensis for biodegradation and biosorption of Reactive Red 120 (Reddy & Osborne, 2020). Moreover, manganese sand filters and ferro‐ferric oxide were jointly used for enhanced removal of antimony in printing and dyeing wastewater (Liu, Ying, Li, Norra, & Lichtfouse, 2020). On the other hand, recourse recovery is an on‐going effort in current wastewater management.…”