Synthesis and characterization of fly ash based geopolymeric membrane for produced water treatment

Abstract

Geopolymerization is a green innovative technique for the synthesis of inorganic membrane using fly ash as a raw material. In this work, fly ashes from thermal power plant were used as a source material for the synthesis of sintering-free, self-supported geopolymeric membrane. Geopolymeric slurry was obtained by chemical activation (Na 2 SiO 3 /NaOH = 2.5 and 15 M) of fly ashes (Si/Al = 2.8) after mixing of 30 min with 120 rpm. Compressive strength of 18.5 MPa was achieved after curing and hydrothermal treatment at 90°C for 24 h with the average pore size of 0.4-0.3 µm. Flux of different range 10, 14, 20, 26, and 29 L h-1 m-2 was obtained at driving pressure of 2, 3, 4, 5, and 6 bar respectively. Flux decline for produced water through prepared membrane were investigated after 60 s. Parametric studies of produced water from oil and gas production facility were also investigated before and after treatment.

Manifestation of Waste Silicate Type Additives and Electron Beam Irradiation on Properties of Sbr/devulcanized Waste Tire Rubber Composites for Floor Tiles Applications

“…Furthermore, for the fly ash (SiO 2~5 9.23%), In raw fly ash (FA), the broad peak at 3412 cm -1 was ascribed to the stretching and deformation vibrations of OH and H-O-H groups from the water molecules, the presence of silica and alumina induced different linkages which have different vibration modes for identification. High intensity of Si-O-Si at 1435 cm -1 and Si-O-Al at 870 cm -1 [32] as shown in figure 1b. FA treated by silane shows the change in the intensity of the OH groups in silica, which resulted in lower reactivity of FA for silane than in the case of MS. FTIR spectra GW (SiO 2~7 1.9%) untreated with silane showed the same characteristic peaks of silica and after treated with silane the characteristic peak of silane is present with little change in the intensity of the OH groups in silica, which resulted in a lower quantity of hydrogen bond than in the case of MS as shown in Figure 1c.…”

The Capacity of Alkali‐Activated Industrial Wastes in Novel Sustainable Ceramic Membranes

“…Based on the literature, amorphous and crystalline silica can be formed when rice husk is combusted at 600 and 1000 °C, respectively [9]. Saeed et al [67] showed that the RHA is appropriate to synthesize alkaliactivated membranes due to its advantages such as high porosity, amorphous structure, and low density [67].…”

“…Also, the COD removal of the UF membrane was 100 % in gasoil removal from water [21]. Saeed et al [67] utilized RHA as a silica source material to fabricate an alkali-activated porous ceramic membrane [67]. Amir et al [80] prepared a geopolymer-based MF ceramic membrane using metakaolin.…”

“…Saeed et al. [67] showed that the RHA is appropriate to synthesize alkali‐activated membranes due to its advantages such as high porosity, amorphous structure, and low density [67].…”

Petrochemical wastewater and produced water: Treatment technology and resource recovery

“…Self-supported geopolymeric membrane was prepared via geopolymerization process with fly ash from a thermal power plant as raw material and tested for produced water treatment (Naveed et al, 2019). Electrodialysis was used to treat high-salinity flowback water produced from hydraulic fracturing operations in Marcellus and Barnett shale formations with a mixture of multivalent cations (Severin & Hayes, 2019).…”