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<p>With increasing global water scarcity, there is an increasing need for developing low-cost efficient natural adsorbents for water purification. The discharge of methylene blue (MB) organic dye from wastewaters is a significant issue due to its huge waste production and hazardous impacts on environment and health. In this study, the primary mineral found in bone and tooth tissues, Hydroxyapatite (HA)-based nanoceramics were investigated for MB adsorption potential. Having exhibits exceptional mechanical strength, chemical resistance, hydrophilicity as well as its biocompatibility and bioactivity, HA has high stability and notably eco-friendly when benchmarked against alternative adsorbents, such as activated carbon. To improve adsorption potential of HA, it was enriched with natural zeolite, clinoptilolite (CLP) with integrated mesoporous structure. HA-CLP nanoceramics were synthesized by sol-gel method, and their dried and sintered forms were investigated for MB removal efficiencies. With initial experiments, the most efficient two compositions were chosen as dried HA-CLP and its sintered form at 800 ℃ having porous interconnected morphologies. The influence of pH(2–12), adsorbent concentration (0.1–1.5&#xa0;g/L), dye concentration(5–25&#xa0;mg/L), and contact time(2–120&#xa0;min) were examined, and kinetic studies were executed with the chosen compositions. MB adsorption on nanoceramics was confirmed elementally by Energy Dispersive X-Ray (EDX) analyses. The optimal pH for both compositions was determined as pH 7. MB removal efficiency has constantly improved reaching a saturation after 90&#xa0;min, and the maximum removal efficiency after 120&#xa0;min with HA-CLP adsorbent was reached to 90.3 ± 0.8%. Therefore, HA-CLP nanoceramics can be potential adsorbent materials for the removal of MB for wastewater treatments.</p>

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Natural zeolite doped hydroxyapatite nanoceramics as adsorbents for removal of methylene blue dye

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Fatma Zehra Koçak,
  • Şennur Merve Yakut,
  • Nilüfer Küçükdeveci

摘要

With increasing global water scarcity, there is an increasing need for developing low-cost efficient natural adsorbents for water purification. The discharge of methylene blue (MB) organic dye from wastewaters is a significant issue due to its huge waste production and hazardous impacts on environment and health. In this study, the primary mineral found in bone and tooth tissues, Hydroxyapatite (HA)-based nanoceramics were investigated for MB adsorption potential. Having exhibits exceptional mechanical strength, chemical resistance, hydrophilicity as well as its biocompatibility and bioactivity, HA has high stability and notably eco-friendly when benchmarked against alternative adsorbents, such as activated carbon. To improve adsorption potential of HA, it was enriched with natural zeolite, clinoptilolite (CLP) with integrated mesoporous structure. HA-CLP nanoceramics were synthesized by sol-gel method, and their dried and sintered forms were investigated for MB removal efficiencies. With initial experiments, the most efficient two compositions were chosen as dried HA-CLP and its sintered form at 800 ℃ having porous interconnected morphologies. The influence of pH(2–12), adsorbent concentration (0.1–1.5 g/L), dye concentration(5–25 mg/L), and contact time(2–120 min) were examined, and kinetic studies were executed with the chosen compositions. MB adsorption on nanoceramics was confirmed elementally by Energy Dispersive X-Ray (EDX) analyses. The optimal pH for both compositions was determined as pH 7. MB removal efficiency has constantly improved reaching a saturation after 90 min, and the maximum removal efficiency after 120 min with HA-CLP adsorbent was reached to 90.3 ± 0.8%. Therefore, HA-CLP nanoceramics can be potential adsorbent materials for the removal of MB for wastewater treatments.