Interaction of Titanium Dioxide with Formaldehyde in the Presence of Quartz Sand under Static and Dynamic Conditions

Abstract

Formaldehyde (FA) is an extremely active compound that is widely used in numerous applications. Given that FA is a known carcinogen, it is essential to remove it from the environment. Titanium dioxide (TiO2), due to its special physicochemical properties, is a promising adsorbent for the removal of specific organic compounds from aqueous solutions. In this study, the interaction of TiO2 with FA in the presence and absence of quartz sand, the most common mineral on the Earth’s surface, was investigated under static and dynamic (batch) conditions, at 25 °C. The experimental data suggested that the sorption of FA onto TiO2 can be described adequately by a pseudo-second order kinetic model, indicating that the main sorption mechanism was chemisorption. It was observed that the combination of TiO2 and quartz sand could1 lead up to effective removal of FA from aqueous samples.

Cotransport of titanium dioxide nanoparticles and formaldehyde in saturated and unsaturated columns packed with quartz sand

“…Previous studies have shown that the presence of NaCl does not affect FA retention by the quartz sand (Fountouli et al., 2019), and that FA can sorb significantly onto TiO 2 nanoparticles (Stefanarou & Chrysikopoulos, 2021). Furthermore, no significant FA retention by the quartz sand has been observed in batch experiments or in flowthrough experiments in packed columns under both water saturated and unsaturated conditions (Fountouli et al., 2019; Fountouli & Chrysikopoulos, 2020).…”

“…Recent studies revealed that FA adsorbs onto TiO 2 surfaces mainly in a monodentate configuration (Setvin et al., 2017), and FA adsorption onto TiO 2 nanoparticles occurs mainly due to a chemisorption process with pseudo‐second‐order kinetics (Stefanarou & Chrysikopoulos, 2021). Also, TiO 2 nanoparticles may facilitate the transport of coexisting pollutants and colloidal and biocolloidal particles through porous media (Cai et al., 2013, 2014, 2019; G. Chen et al., 2012; Chowdhury et al., 2012; Fang et al., 2016; Guo et al., 2018; Syngouna et al., 2017; Xia et al., 2019).…”

Preparation and properties of poly(lactic acid)/g‐titanium dioxide electrospinning membranes based on thiol‐ene click chemistry

“…The fitting Q e 2 values of 3.227 and 14.404 mg·g −1 obtained from the two fiber membrane differed very little from the actual tested Q e values of 3.16 and 13.69 mg·g −1 , respectively. Therefore, the adsorption process of TP0 and TP4 fiber membranes conforms to the pseudo‐second‐order kinetic model, which is an adsorption process based on chemical adsorption, 69 indicating that a large amount of MB is adsorbed through the covalent bond between the fiber membrane and MB. The adsorption capacity of TP4 fiber membrane was significantly higher than that of TP0 fiber membrane and other PLA composite fiber membranes 70 .…”

A Review of the Status, Effects, Prevention, and Remediation of Groundwater Contamination for Sustainable Environment

“…The fate of ECs and their transport into groundwater systems are critical in understanding groundwater pollution. Many researchers studied the fate of many ECs and their transport into soil and groundwater systems, namely formaldehyde [32,33], titanium dioxide [34], cotransport of biocolloids [35], cotransport of human adenoviruses [36], cotransport of clay colloids [37,38], transport of bio colloids [39], and cotransport of Pseudomonas putida and kaolinite particles [40].…”