Scholarlink

<p>Progress in industrial and agricultural activities, as well as the discharge of insufficiently treated effluents, notably dyes and heavy metals, have amplified the polluting load on the environment. Global concern over water contamination by pollutants requires innovative and sustainable remediation technologies. These pollutants compounds pose considerable challenges in drinking water and a serious health and environmental threat to the ecosystem. Although adsorption using nanoparticle has proven to be an ideal technique for the treatment of these dye contaminants from aqueous solutions. The literature shows that nanocomposites and nanomaterials are a class of materials that have flourished significant consideration, especially concerning water treatment. In adsorption technology, nanoparticles act as absorbents, prominent to enhance their removal efficiency towards contaminants. The main objective of this work was to find the optimal conditions that result in maximum adsorption capacity for the elimination of YB from wastewater by TiO<sub>2</sub>&#xa0;nanoparticles and suggests a likely mechanism for this process. For that the effects of contact time, initial pH, adsorbent dosage and YB initial concentration on the dye adsorption onto TiO<sub>2</sub> nanoparticles has been investigated at batch conditions. The adsorptions kinetics were found to follow rather a pseudo-second order kinetic with a determination coefficient (0.9906 &lt; R<sup>2</sup> &lt; 0.9968). Several models have been documented for describing the experimental data obtained for the adsorption processes. The results indicate the adsorption follows well the Langmuir equation, providing a better fit of the equilibrium adsorption data (R<sup>2</sup> = 0.998, SSE = 0.0006). Under optimized conditions, up to 14.705&#xa0;mg/g at 25&#xa0;°C is removed from the solution, this finding was attributed to the formation of smaller nanoparticles (approximately 32&#xa0;nm), which provided a greater specific surface area. The photocatalytic degradation rate was favored for high concentrations of solution in agreement with Langmuir–Hinshelwood (L–H) model. The values <i>k</i>c and <i>K</i> for the photocatalytic degradation of YB were found to be 1.992 mgL/min and 0.2906 L/mg respectively. The degradation rate was found to be dependent on pH and temperature with a high degradation rate for pH 4 and a rise in temperature. The TiO<sub>2</sub> nanoparticles have a better activity for the YB degradation, compared to the various commercial catalysts, and others nanoparticles (Fe<sub>2</sub>O<sub>3</sub>, SnO<sub>2</sub>, CoFe<sub>2</sub>O<sub>4</sub>,…) already available in the literature.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Depollution of water contaminated by Yellow Bezacryl (YB) using TiO2 nano photocatalyst: kinetic study, isotherms modeling and adsorption mechanism

  • 期刊论文

  • 发表日期：

    2025年1月7日

查看全文
  • Moussa Abbas

摘要

Progress in industrial and agricultural activities, as well as the discharge of insufficiently treated effluents, notably dyes and heavy metals, have amplified the polluting load on the environment. Global concern over water contamination by pollutants requires innovative and sustainable remediation technologies. These pollutants compounds pose considerable challenges in drinking water and a serious health and environmental threat to the ecosystem. Although adsorption using nanoparticle has proven to be an ideal technique for the treatment of these dye contaminants from aqueous solutions. The literature shows that nanocomposites and nanomaterials are a class of materials that have flourished significant consideration, especially concerning water treatment. In adsorption technology, nanoparticles act as absorbents, prominent to enhance their removal efficiency towards contaminants. The main objective of this work was to find the optimal conditions that result in maximum adsorption capacity for the elimination of YB from wastewater by TiO2 nanoparticles and suggests a likely mechanism for this process. For that the effects of contact time, initial pH, adsorbent dosage and YB initial concentration on the dye adsorption onto TiO2 nanoparticles has been investigated at batch conditions. The adsorptions kinetics were found to follow rather a pseudo-second order kinetic with a determination coefficient (0.9906 < R2 < 0.9968). Several models have been documented for describing the experimental data obtained for the adsorption processes. The results indicate the adsorption follows well the Langmuir equation, providing a better fit of the equilibrium adsorption data (R2 = 0.998, SSE = 0.0006). Under optimized conditions, up to 14.705 mg/g at 25 °C is removed from the solution, this finding was attributed to the formation of smaller nanoparticles (approximately 32 nm), which provided a greater specific surface area. The photocatalytic degradation rate was favored for high concentrations of solution in agreement with Langmuir–Hinshelwood (L–H) model. The values kc and K for the photocatalytic degradation of YB were found to be 1.992 mgL/min and 0.2906 L/mg respectively. The degradation rate was found to be dependent on pH and temperature with a high degradation rate for pH 4 and a rise in temperature. The TiO2 nanoparticles have a better activity for the YB degradation, compared to the various commercial catalysts, and others nanoparticles (Fe2O3, SnO2, CoFe2O4,…) already available in the literature.