Scholarlink

This study aimed to assess the photocatalytic processes for removing lead (Pb2+) in a batch system utilising grape leaves titanium dioxide nanoparticles (GL-TiO2 NPs) with an average size of ~44 nm and a specific surface area of 50.4 m2/g, produced through a green synthesis method. The results indicated that increasing the TiO2 dosage and H2O2 concentration enhanced lead removal efficiency. The optimal lead removal of 94.35% was achieved with a TiO2 dosage of 200 mg/L at a pH of 7. The adsorption of Pb2+ ions onto the synthesised TiO2 NPs extracted from grape leaves conformed to the Langmuir adsorption isotherm (R2 = 0.948). This favourable correlation indicates that the adsorption process matches effectively with the assumptions of the Langmuir isotherm, which posits that there is monolayer adsorption on a surface with a limited number of identical sites, allowing Pb(II) to adsorb up to 35.66 mg/g of metal. Furthermore, the pseudo-first-order kinetics model showed R2 values exceeding 88% for GL-TiO2, confirming that chemisorption is the dominant process.

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

Using Biosynthesis of TiO2 for the Photocatalytic Removal of Lead (II) Ions from Aqueous Solutions in a Batch System Utilising Advanced Oxidation Processes

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Hasanain Hafedh Khlaif,
  • Zainab Bahaa Mohammed,
  • Adnan Abbas Al-Samawi

摘要

This study aimed to assess the photocatalytic processes for removing lead (Pb2+) in a batch system utilising grape leaves titanium dioxide nanoparticles (GL-TiO2 NPs) with an average size of ~44 nm and a specific surface area of 50.4 m2/g, produced through a green synthesis method. The results indicated that increasing the TiO2 dosage and H2O2 concentration enhanced lead removal efficiency. The optimal lead removal of 94.35% was achieved with a TiO2 dosage of 200 mg/L at a pH of 7. The adsorption of Pb2+ ions onto the synthesised TiO2 NPs extracted from grape leaves conformed to the Langmuir adsorption isotherm (R2 = 0.948). This favourable correlation indicates that the adsorption process matches effectively with the assumptions of the Langmuir isotherm, which posits that there is monolayer adsorption on a surface with a limited number of identical sites, allowing Pb(II) to adsorb up to 35.66 mg/g of metal. Furthermore, the pseudo-first-order kinetics model showed R2 values exceeding 88% for GL-TiO2, confirming that chemisorption is the dominant process.