Heterogeneous Fenton-like discoloration of organic dyes catalyzed by porous schorl ceramisite

Abstract

Due to the difficult separation of superfine schorl powder (SSP) from solution after being used, millimetre-scale porous schorl ceramisite (PSC) was obtained through solid-phase sintering method and used as a heterogeneous catalyst for Fenton-like discoloration of organic dyes. SSP and PSC were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The results demonstrated that both SSP and PSC were mainly composed of schorl and there existed large amounts of micropores on the surface of PSC. A series of control experiments indicated that PSC exhibited higher Fenton-like catalytic activity than SSP. Methylene blue (MB) discoloration in both PSC-HO and SSP-HO systems followed pseudo-first-order kinetics and the reaction rate constant k obtained in PSC-HO system was 3.23 times as large as the one in SSP-HO system. Then, the process optimization of MB discoloration in heterogeneous Fenton-like reaction catalyzed by PSC was operated by central composite design under response surface methodology. Based on the model prediction, the optimum conditions for MB discoloration in this system were determined.

A novel application for magnetite tailings and municipal sludge in ceramsite preparation

“…[6][7][8] Ceramsite has been widely used in various fields, including construction, environmental protection, and horticulture, leading to the rapid development of ceramsite preparation technology in recent years. 9,10 Clay and shale are presently the main raw materials for ceramsite preparation; however, their mining has been banned in some regions of China due to ecological and environmental concerns. 11 Especially in the research process of industrial solid waste recycling in recent years.…”

“…As a lightweight aggregate, ceramsite is characterized by low density, high cylinder compression strength, high porosity, corrosion resistance, good seismic and frost resistance, and excellent alkali‐resistant aggregate reactivity 6–8 . Ceramsite has been widely used in various fields, including construction, environmental protection, and horticulture, leading to the rapid development of ceramsite preparation technology in recent years 9,10 . Clay and shale are presently the main raw materials for ceramsite preparation; however, their mining has been banned in some regions of China due to ecological and environmental concerns 11 .…”

A Facilely Synthesized Tourmaline-Biochar Composite For Enhanced Removal of Cr (VI) From Aqueous Solution

“…Additionally, modifying tourmaline can be used to make composites with TiO 2 (Liang et al 2010), carbon (Bi et al 2021), porous ceramisite (Xu et al 2016), montmorillonite (Chen et al 2020) and rare-earth elements (Zhu et al 2010). for better performance, such as tensile strength, antibacterial ability and surface area (Lehmann et al 2006).…”

Process optimization for effective bio‐decolourization of methyl orange by Pseudomonas aeruginosa 23N1 using chemometric methodology

“…Thus, the treatment of coloured wastewater is a necessity to minimise biotic risks and to restore the ecological health of the environment. Although, numerous conventional physiochemical techniques such as adsorption, coagulation, nanofiltration, and oxidation using ozone or other advanced oxidants have been investigated to remove colour compounds from wastewater, higher processing costs made these methods unattractive in practice . Furthermore, these methods generate a large volume of sludge at the end of treatment, and the addition of toxic chemicals into the process limits its sustainable application to treat dye‐contaminated wastewater .…”