High-flux robust ceramic membranes functionally decorated with nano-catalyst for emerging micro-pollutant removal from water

Flexible Superhydrophobic Metal-Based Carbon Nanotube Membrane for Electrochemically Enhanced Water Treatment

“…316L stainless steel powder (SS, D 50 = 10.5 μm (Figure S2), Antai Technology Co., Ltd., China), poly­(ether sulfone) (PES, Bei-Shi-De Synthetic Plastics Company, China), and N -methyl-2-pyrrolidone (NMP, Sinopharm Chemical Reagent Co., Ltd., China) were used as raw material, polymeric binder and solvent, respectively, to form a suspension. Polyvinylpyrrolidone (PVP, Sinopharm Chemical Reagent Co., Ltd., China) was then used to enhance the viscosity of the suspension. , The SS power and PES were fully dried at 60 °C for 48 h, while all other chemicals were used without further treatment. All the gases (ethylene, hydrogen, and nitrogen, purity ≥99.999%) were purchased from Dalian Guanghui Gas Co., Ltd., China.…”

“…Polyvinylpyrrolidone (PVP, Sinopharm Chemical Reagent Co., Ltd., China) was then used to enhance the viscosity of the suspension. 28,29 The SS power and PES were fully dried at 60 °C for 48 h, while all other chemicals were used without further treatment. All the gases (ethylene, hydrogen, and nitrogen, purity ≥99.999%) were purchased from Dalian Guanghui Gas Co., Ltd., China.…”

Flow-through heterogeneous electro-Fenton based on Co-CNT/Ti3C2TX membrane for improved tetracycline removal in wide pH ranges

“…With the continuous development of society and industry, the types and quantities of emerging pollutants discharged into wastewater are increasing. 1 Among them, the most troublesome pollutants in the water body include heavy metals, 2 non-degradable organic pollutants, 3 and new pollutants. 4 In particular, the concentration of these refractory organic pollutants may be low in the actual water environment, but they are difficult to be completely removed by traditional treatment methods.…”

Hybrid oxidation separation technology (HOST) for synergistic removal of recalcitrant pollutants in water

“…20 α-Mn2O3 sublayer: Lt = 14-54 nm; Pcw = 108 LMHB • 30 α-Mn2O3 sublayer: Lt = 19-110 nm; Pcw = 119 LMHB • 40 α-Mn2O3 sublayer: Lt = 20-73 nm; Pcw = 114 LMHB (Corneal et al, 2011) • Commercial multichannel tubular TiO2 UF CM with TiO2/ZrO2 filtration layer (MWCO = 5 kDa) • α-Mn2O3 layer: Lt = 14-54 nm (Wang et al, 2017a) Mn or Fe oxide • Commercial multichannel tubular TiO2 UF CM with TiO2/ZrO2 filtration layer (MWCO = 5 kDa) • Mn oxide layer (20 sublayers): Lt = 14-54 nm • Fe oxide layer (40 sublayers): Lt = ~46 nm (Byun et al, 2011) MnO2-Co3O4 • Commercial multichannel tubular α-Al2O3 UF CM with ZrO2 filtration layer (dpore = 50 nm) • Uniform distribution of MnO2-Co3O4 on the CCM surface resulted in a smoother surface with densely packed nanoparticles • MnO2-Co3O4 layer: Lt = 10-15 μm (Guo et al, 2016) Dip-coating γ-Fe2O3 • Commercial tubular α-Al2O3 NF CM with microporous TiO2 skin layer (MWCO = 200 Da) • A mesoporous γ-Fe2O3 layer coated on top of the TiO2 skin layer: Lt = ~80 nm; Pcw = ~10 LMHB (Mansas et al, 2020) (b) MeOx precursor solution Dip-coating CoFe2O4 • Hollow fibre α-Al2O3 (dpore = 268 nm, Pcw = 2634 LMHB)• Thin layer of CoFe2O4 (~70 nm) coated onto the Al2O3 grains: dpore = 252 nm, Wcat = 8.6 g m −2 , Pcw = 2575 LMHB (2 sublayers) • More CoFe2O4 nanocatalysts presence at the sponge-like interlayer due to the longer retention time and more tortuous pores(Wang et al, 2020c) …”

“…successfully fabricated Fe2O3-coated CCM by alternate deposition of the Fe2O3 colloidal suspension and aqueous phytic acid for effective organic removal and DBP inhibition in the hybrid catalytic ozonation and chloride) (PDDA) layer onto the CM, followed by a layer of negatively charged MnO2 suspension to assemble a MnO2 sublayer onto the CM surface.The final multilayer MnO2 coating was achieved by repeating the alternate layer-by-layer coating of the polycation PDDA and the negatively charged MnO2 suspension. It was reported that the increase of coating times could significantly improve the catalytic performance of the CCM due to more active sites available for the catalytic reactions(Guo et al, 2016).Instead of pre-synthesised MeOx, the CM substrate can be first coated with the MeOx precursor solution via surface coating techniques, such as dip-coating(Wang et al, 2020c) and spin-coating(Zhao et al, 2020b) processes, followed by heat treatment for the MeOx to crystallise and immobilise onto the CM surface. For instance, Chen et al (2015b) fabricated Ti-Mn oxide-coated CCM via a sol-gel technique combined with dip-coating technique and applied for aquaculture wastewater treatment in a pilot scale hybrid catalytic ozonation and membrane separation process.…”