Evaluation of Amine Functionalized Thermal Power Plant Solid Waste for Industrial Wastewater Remediation

Abstract

Micro/nanoparticles generated after the combustion of coal/lignite in the thermal power plants were modified with amino groups of (3-aminopropyl) triethoxysilane (APTES). These silane-based functional particles were applied in textile dye (xylenol orange, XO and methyl orange, MO) removal process to deal with an industrial wastewater problem. The maximum adsorption efficiencies of APTES coated micro/nanoparticles for MO and XO dye molecules were calculated to be around 98% and 75%, respectively. The adsorption behavior of the LCFA against dyes is also assessed by investigating the effect of adsorbent dosage, contact time, pH, and temperature. The optimum dye removal was observed at a pH of 4.0, and the equilibrium was achieved within 5 min. The maximum uptake capacities of LCFA-APTES for MO and XO dye molecules were calculated to be around 17.91 and 14.72 mg g−1, respectively. This value is approximately 3 − 5 times higher than the similar adsorbent in the literature. The uptake mechanism of MO and XO dyes onto LCFA-APTES is governed by electrostatic interaction and hydrogen bonding between dye molecules and APTES. The surface chemical modifications and the nature of functional groups were ascertained by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray fluorescence (XRF), and X-ray photoelectron spectroscopy (XPS). The application of recovered micro/nanoparticles from solid wastes and their utilization for wastewater treatment is important not only for economy of developing countries but also for protecting the environment.

3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

“…Although the profile of each adsorbent differs from one another, all of them have advantages and disadvantages. Table compares GWW/APTES and other adsorbents reported in the literature studies. ,− ,− The maximum adsorption capacity ( Q max ) is the main factor taken into account to evaluate the adsorbent performances. Therefore, the various adsorbents’ performance, including amino-functionalized materials, activated carbons, and clay materials, ,− ,− in the removal of MO are presented in Table …”

Transformation of Fly Ash-Based Oxide Particles into a Functional Silica–Alumina Aerogel and Its Potential Application as an Anti-icing Surface

“…Regardless of their source, these fly ashes have various glassy, spherical silica, and alumina particles (diameter ranges from 100 nm to 500 μm) that have the potential to be exploited in industry to a large extent. 17,18 However, it should be noted that they contain heavy metal residues even at the parts per million level, which causes concerns about the environment and public health. In recent years, both the elimination of these residues and the effective processing of FAs have become a topic of many investigations.…”