Scholarlink

<p>Industrial effluents contain numerous pollutants, including heavy metals, which pose serious environmental and health risks when discharged untreated into water bodies such as rivers, lakes, and groundwater. This study explores the production of biosurfactants from native actinomycetes cultivated on agro-industrial wastes. The produced biosurfactants were evaluated for removing and recovering heavy and precious metals from various industrial and mining effluents through the ion flotation technique. The results revealed that biosurfactant production reached 1.64&#xa0;g/L and 1.32&#xa0;g/L using mineral salt culture medium supplemented with 5% waste vegetable frying oil and 2.1% whey and a combination of oil industrial wastewater with 4.5% waste vegetable oil and 0.5% whey, respectively. LC-MS analysis identified peaks corresponding to surfactin lipopeptide. The produced biosurfactants effectively reduced the surface tension of water to 37 mN/m, with a critical micelle concentration of 80&#xa0;mg/L. Utilizing the ion flotation technique, these biosurfactants efficiently removed hazardous metals from industrial effluents, achieving maximum removal rates of 99.99% for silicon, 99% for boron, 98.29% for iron, and 98.25% for cadmium from textile effluents, and 99.93% for cadmium, 96.6% for cobalt, 95.9% for nickel, and 95% for lead from paint effluents. Additionally, a gold recovery rate of 82.13% was obtained from the Sukari mine in Egypt. These findings demonstrate that biosurfactants produced from actinomycetes are promising agents for the removal of heavy metals from industrial effluents and the recovery of precious metals.</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

Biosurfactant production from actinomycetes using agro-industrial wastes and applications in heavy metal removal and precious metal recovery

  • 期刊论文

  • 发表日期：

    2025年8月13日

查看全文
  • Nada Hesham,
  • Sami Ibrahim,
  • Hesham Abdulla,
  • Heba Taher

摘要

Industrial effluents contain numerous pollutants, including heavy metals, which pose serious environmental and health risks when discharged untreated into water bodies such as rivers, lakes, and groundwater. This study explores the production of biosurfactants from native actinomycetes cultivated on agro-industrial wastes. The produced biosurfactants were evaluated for removing and recovering heavy and precious metals from various industrial and mining effluents through the ion flotation technique. The results revealed that biosurfactant production reached 1.64 g/L and 1.32 g/L using mineral salt culture medium supplemented with 5% waste vegetable frying oil and 2.1% whey and a combination of oil industrial wastewater with 4.5% waste vegetable oil and 0.5% whey, respectively. LC-MS analysis identified peaks corresponding to surfactin lipopeptide. The produced biosurfactants effectively reduced the surface tension of water to 37 mN/m, with a critical micelle concentration of 80 mg/L. Utilizing the ion flotation technique, these biosurfactants efficiently removed hazardous metals from industrial effluents, achieving maximum removal rates of 99.99% for silicon, 99% for boron, 98.29% for iron, and 98.25% for cadmium from textile effluents, and 99.93% for cadmium, 96.6% for cobalt, 95.9% for nickel, and 95% for lead from paint effluents. Additionally, a gold recovery rate of 82.13% was obtained from the Sukari mine in Egypt. These findings demonstrate that biosurfactants produced from actinomycetes are promising agents for the removal of heavy metals from industrial effluents and the recovery of precious metals.