Scholarlink

<p>Here in this research, activated carbon derived from susbine biomass was prepared and incorporated into polyvinyl alcohol and sodium alginate. To prepare composite beads, the gel was added into 4% CaCl<sub>2</sub> solution. The CaCl<sub>2</sub> was used as cross-linking agents. After cross-linking, the composite beads were successfully synthesized and used to adsorb methylene blue from water. For characterization of the composite beads, various analyses like FTIR, SEM, EDX, and TGA were used. Various adsorption variables such as pH (2–11), dose of composite beads (0.0025–0.020&#xa0;g), concentrations (100–600&#xa0;mg/L), time (30–300&#xa0;min), and temperature (25–45&#xa0;°C) were investigated. The current study showed that maximum MB adsorption on composite beads was 1428.25&#xa0;mg/L at pH 10. Moreover, the results of MB adsorption studies on composite beads indicated that it best followed pseudo-second kinetic model (<i>R</i><sup>2</sup> 0.999), whereas the data best fitted to the Langmuir isotherm (<i>R</i><sup>2</sup> 0.999). Thermodynamic study revealed that the adsorption process was endothermic (∆<i>H</i>° = 1.21&#xa0;J/mol), while the negative value of ∆<i>G</i>° (− 2.028&#xa0;J/mol at 298&#xa0;K) described that MB is spontaneously adsorbed on composite beads.</p> Graphical Abstract <p></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

Fabrication of activated carbon, polyvinyl alcohol–based alginate composite beads for the removal of methylene blue

  • 期刊论文

  • 发表日期：

    2025年4月15日

查看全文
  • Nasim Ullah,
  • Zarshad Ali,
  • Amir Sada Khan,
  • Bushra Adalat,
  • Asma Nasrullah,
  • Ruqyyia Shaheen

摘要

Here in this research, activated carbon derived from susbine biomass was prepared and incorporated into polyvinyl alcohol and sodium alginate. To prepare composite beads, the gel was added into 4% CaCl2 solution. The CaCl2 was used as cross-linking agents. After cross-linking, the composite beads were successfully synthesized and used to adsorb methylene blue from water. For characterization of the composite beads, various analyses like FTIR, SEM, EDX, and TGA were used. Various adsorption variables such as pH (2–11), dose of composite beads (0.0025–0.020 g), concentrations (100–600 mg/L), time (30–300 min), and temperature (25–45 °C) were investigated. The current study showed that maximum MB adsorption on composite beads was 1428.25 mg/L at pH 10. Moreover, the results of MB adsorption studies on composite beads indicated that it best followed pseudo-second kinetic model (R2 0.999), whereas the data best fitted to the Langmuir isotherm (R2 0.999). Thermodynamic study revealed that the adsorption process was endothermic (∆H° = 1.21 J/mol), while the negative value of ∆G° (− 2.028 J/mol at 298 K) described that MB is spontaneously adsorbed on composite beads.

Graphical Abstract