Scholarlink

<p>To select ideal substrates for constructing wetlands, the phosphorus adsorption characteristics of four substrates, i.e., shale, red soil, anthracite, and coal cinder, were systematically evaluated through isothermal adsorption and adsorption kinetics experiments. The results showed that shale exhibited the highest adsorption efficiency of phosphorus, followed by coal cinder, anthracite, and red soil. Phosphorus removal efficiency varied significantly with the different mixing ratios of the substrates. Among the tested mixtures, the combination of shale, anthracite, and coal cinder at a mass ratio of 3:1:2 achieved the highest phosphorus removal efficiency. The adsorption behavior of phosphorus on each substrate was well described by the Langmuir and Freundlich models. Additionally, higher temperatures, higher phosphorus concentrations, and lower particle size enhanced the equilibrium adsorption capacity of the mixed substrates. The adsorption process of phosphorus by the mixed substrates fitted the pseudo-first-order kinetic model and pseudo-second-order kinetic model, while higher temperatures decreased the pseudo-first-order kinetic adsorption rate constants. Ultimately, the mixed substrate composed of shale, anthracite and coal cinder at a mass ratio of 3:1:2 was selected as the optimal choice for future wetland construction.</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

Adsorption of phosphorus on different substrates of constructed wetlands

  • 期刊论文

  • 发表日期：

    2025年3月13日

查看全文
  • X. Liu,
  • M. Tang,
  • C. Lin,
  • H. Zhu,
  • Z. Xu,
  • H. Zhai,
  • X. Tan

摘要

To select ideal substrates for constructing wetlands, the phosphorus adsorption characteristics of four substrates, i.e., shale, red soil, anthracite, and coal cinder, were systematically evaluated through isothermal adsorption and adsorption kinetics experiments. The results showed that shale exhibited the highest adsorption efficiency of phosphorus, followed by coal cinder, anthracite, and red soil. Phosphorus removal efficiency varied significantly with the different mixing ratios of the substrates. Among the tested mixtures, the combination of shale, anthracite, and coal cinder at a mass ratio of 3:1:2 achieved the highest phosphorus removal efficiency. The adsorption behavior of phosphorus on each substrate was well described by the Langmuir and Freundlich models. Additionally, higher temperatures, higher phosphorus concentrations, and lower particle size enhanced the equilibrium adsorption capacity of the mixed substrates. The adsorption process of phosphorus by the mixed substrates fitted the pseudo-first-order kinetic model and pseudo-second-order kinetic model, while higher temperatures decreased the pseudo-first-order kinetic adsorption rate constants. Ultimately, the mixed substrate composed of shale, anthracite and coal cinder at a mass ratio of 3:1:2 was selected as the optimal choice for future wetland construction.