Scholarlink

<p>This research addresses the issues of inadequate treatment efficiency and significant pollution of subsequent ultrafiltration membranes caused by traditional inorganic–organic composite flocculants in the treatment of humic acid wastewater. The mechanism by which palygorskite as an auxiliary in enhancing the efficacy of humic acid removal and controlling membrane contamination was systematically investigated. As auxiliaries of inorganic–organic compound flocculants for humic acid removal from water bodies, palygorskite was added into simulated humic acid wastewater with different raw turbidity. By adjusting the dosage of flocculants, the ideal combination for humic acid removal was determined. Results revealed that turbidity/HA removal increased by &gt; 25% in low-turbidity water (&lt; 10 NTU), achieving 90% reduction. Floc size grew 55% with 11% higher density, accelerating settling by 41%. UF flux decline dropped 63% due to denser flocs and reduced pore-blocking precursors. Furthermore, Mechanistically, palygorskite provided nucleation sites for sweep flocculation, enhanced charge neutralization (zeta potential: -0.8 mV), and enabled 50% PFC dosage reduction. Critically, benefits plateaued beyond 10 mg/L, and efficacy declined in high-turbidity scenarios. Certain dosage of palygorskite (10 mg/L) can also reduce the internal and external membrane resistance forces. Palygorskite optimizes coagulation-UF for low-turbidity HA removal but requires strict dosage control. It offers significant operational savings (reduced coagulant/membrane maintenance) when tuned to water matrix constraint. These results demonstrate palygorskite’s dual role as both a coagulant aid and anti-fouling agent, offering a cost-effective, sustainable alternative to synthetic polymers for membrane-based water treatment. Its natural abundance and chemical stability position it as a viable solution for scaling up fouling-resistant filtration systems.</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

Effects of Palygorskite on Coagulation of Humic Acid Simulated Wastewater and Membrane Fouling in Following Ultrafiltration Process

  • 期刊论文

  • 发表日期：

    2025年8月19日

查看全文
  • Houquan Tang,
  • Chunli Xue,
  • Xiaomei Lu,
  • Yanpeng Chen,
  • Fengzhe Yan,
  • Shuai Zhang

摘要

This research addresses the issues of inadequate treatment efficiency and significant pollution of subsequent ultrafiltration membranes caused by traditional inorganic–organic composite flocculants in the treatment of humic acid wastewater. The mechanism by which palygorskite as an auxiliary in enhancing the efficacy of humic acid removal and controlling membrane contamination was systematically investigated. As auxiliaries of inorganic–organic compound flocculants for humic acid removal from water bodies, palygorskite was added into simulated humic acid wastewater with different raw turbidity. By adjusting the dosage of flocculants, the ideal combination for humic acid removal was determined. Results revealed that turbidity/HA removal increased by > 25% in low-turbidity water (< 10 NTU), achieving 90% reduction. Floc size grew 55% with 11% higher density, accelerating settling by 41%. UF flux decline dropped 63% due to denser flocs and reduced pore-blocking precursors. Furthermore, Mechanistically, palygorskite provided nucleation sites for sweep flocculation, enhanced charge neutralization (zeta potential: -0.8 mV), and enabled 50% PFC dosage reduction. Critically, benefits plateaued beyond 10 mg/L, and efficacy declined in high-turbidity scenarios. Certain dosage of palygorskite (10 mg/L) can also reduce the internal and external membrane resistance forces. Palygorskite optimizes coagulation-UF for low-turbidity HA removal but requires strict dosage control. It offers significant operational savings (reduced coagulant/membrane maintenance) when tuned to water matrix constraint. These results demonstrate palygorskite’s dual role as both a coagulant aid and anti-fouling agent, offering a cost-effective, sustainable alternative to synthetic polymers for membrane-based water treatment. Its natural abundance and chemical stability position it as a viable solution for scaling up fouling-resistant filtration systems.