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废旧塑料浮选分离中气泡黏附行为的影响

赵 钺 黄 佳 李彦鹏 刘 珺 孟庆龙

赵 钺, 黄 佳, 李彦鹏, 刘 珺, 孟庆龙. 废旧塑料浮选分离中气泡黏附行为的影响[J]. 环境科学研究, 2015, 28(4): 582-588.
引用本文: 赵 钺, 黄 佳, 李彦鹏, 刘 珺, 孟庆龙. 废旧塑料浮选分离中气泡黏附行为的影响[J]. 环境科学研究, 2015, 28(4): 582-588.
ZHAO Yue, HUANG Jia, LI Yanpeng, LIU Jun, MENG Qinglong. Research on Bubble Attachment Behavior in the Flotation Process of Waste Plastics[J]. Research of Environmental Sciences, 2015, 28(4): 582-588.
Citation: ZHAO Yue, HUANG Jia, LI Yanpeng, LIU Jun, MENG Qinglong. Research on Bubble Attachment Behavior in the Flotation Process of Waste Plastics[J]. Research of Environmental Sciences, 2015, 28(4): 582-588.

废旧塑料浮选分离中气泡黏附行为的影响

基金项目: 流体动力与机电系统国家重点实验室开放基金项目(GZKF-201026);中央高校基本科研业务专项基金项目(2013G2291013)

Research on Bubble Attachment Behavior in the Flotation Process of Waste Plastics

  • 摘要: 塑料浮选作为一种基于表面活性剂的废旧塑料分选技术,是解决废旧塑料环境污染的有效方法. 为深入考察塑料浮选过程中气泡的黏附行为及影响因素,运用高速摄影技术结合气泡黏附时间模型,对比分析纯水中气泡与亲/疏水材料的黏附效果,重点比较不同溶液〔纯水、鼠李糖脂和SDS(十二烷基硫酸钠)溶液〕中气泡与疏水材料的黏附时间变化,并探讨其影响机制. 结果表明:气泡在纯水中只与疏水材料发生黏附,表面活性剂及其浓度对气泡与疏水材料的黏附时间影响显著. 在c(鼠李糖脂)和c(SDS)(二者均为0.03 mmol/L)均较低的溶液中,气泡与疏水材料的黏附时间由纯水中的158 ms分别降至120和140 ms,而二者较高(10.00 mmol/L)时黏附时间分别增至1 134和338 ms. 基于黏附时间模型分析表明,黏附时间是气泡尺寸、接触角、溶液黏度及表面张力等参数的函数,通过控制这些参数可以调控气泡在目标塑料表面的黏附时间,实现浮选效率的优化.

     

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  • 刊出日期:  2015-04-25

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