Scholarlink

<p>Palm oil fuel ash (POFA) is a waste byproduct from the combustion of oil palm biomass in power generation. While it does not have the heavy metal leaching issues found in coal fly ash, its production presents challenges related to landfill space and management costs. To address this, POFA can be repurposed as an adsorbent, reducing disposal volumes. In this study, POFA's adsorption properties were enhanced by modifying it with Mg/Fe layered double hydroxides through co-precipitation and hydrothermal treatment. The resulting POFA-Mg/Fe LDH (P-LDH 1.0) was extensively characterized using scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray diffraction and Fourier-transform infrared spectroscopy, confirming the successful integration of crystalline LDH onto POFA matrix. Batch adsorption experiments were conducted to evaluate the removal efficiency of P-LDH 1.0 against Reactive Orange 16 (RO16) and Crystal Violet (CV), achieving maximum adsorption capacities of 444.07 mg/g and 1048.69 mg/g, respectively. Adsorption performance was influenced by solution pH, dye concentration, adsorbent dosage, and ionic strength. Isotherm and kinetic analyses indicated that the adsorption of P-LDH 1.0 favored Redlich-Peterson isotherms (R<sup>2</sup> &gt; 0.99), and pseudo-second-order kinetic models (R<sup>2</sup> &gt; 0.97). Moreover, P-LDH 1.0 demonstrated high removal efficiencies for a variety of anionic and triarylmethane dyes, as well as satisfactory treatment of actual industry effluents, including raw textile wastewater and palm oil mill effluent, achieving color, chemical oxygen demand (COD) and total organic carbon reductions ranging between 41.4–94.2%, 26–63.8% and 28.8–57.3%, respectively. Compared to unmodified POFA, pristine LDHs, and other modified fly ashes, the P-LDH 1.0 composite exhibited markedly superior adsorption performance, highlighting its potential as a cost-effective, eco-friendly material for dye-laden wastewater treatment and broader water pollution remediation applications.</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

Transforming Palm Oil Fuel Ash into High-Performance Biosorbents: One-Pot Synthesis of Layered Double Hydroxide Composites for Efficient Removal of Hazardous Dyes from Textile Wastewater

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月25日

查看全文
  • Mohd Amir Asyraf Mohd Hamzah,
  • Norhaniza Yusof,
  • Juhana Jaafar,
  • Ahmad Fauzi Ismail,
  • Woei Jye Lau,
  • Wan Norharyati Wan Salleh,
  • Farhana Aziz

摘要

Palm oil fuel ash (POFA) is a waste byproduct from the combustion of oil palm biomass in power generation. While it does not have the heavy metal leaching issues found in coal fly ash, its production presents challenges related to landfill space and management costs. To address this, POFA can be repurposed as an adsorbent, reducing disposal volumes. In this study, POFA's adsorption properties were enhanced by modifying it with Mg/Fe layered double hydroxides through co-precipitation and hydrothermal treatment. The resulting POFA-Mg/Fe LDH (P-LDH 1.0) was extensively characterized using scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray diffraction and Fourier-transform infrared spectroscopy, confirming the successful integration of crystalline LDH onto POFA matrix. Batch adsorption experiments were conducted to evaluate the removal efficiency of P-LDH 1.0 against Reactive Orange 16 (RO16) and Crystal Violet (CV), achieving maximum adsorption capacities of 444.07 mg/g and 1048.69 mg/g, respectively. Adsorption performance was influenced by solution pH, dye concentration, adsorbent dosage, and ionic strength. Isotherm and kinetic analyses indicated that the adsorption of P-LDH 1.0 favored Redlich-Peterson isotherms (R2 > 0.99), and pseudo-second-order kinetic models (R2 > 0.97). Moreover, P-LDH 1.0 demonstrated high removal efficiencies for a variety of anionic and triarylmethane dyes, as well as satisfactory treatment of actual industry effluents, including raw textile wastewater and palm oil mill effluent, achieving color, chemical oxygen demand (COD) and total organic carbon reductions ranging between 41.4–94.2%, 26–63.8% and 28.8–57.3%, respectively. Compared to unmodified POFA, pristine LDHs, and other modified fly ashes, the P-LDH 1.0 composite exhibited markedly superior adsorption performance, highlighting its potential as a cost-effective, eco-friendly material for dye-laden wastewater treatment and broader water pollution remediation applications.