School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 Hunan, China.
School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 Hunan, China.
Waste Manag. 2017 Sep;67:20-26. doi: 10.1016/j.wasman.2017.05.009. Epub 2017 Jun 2.
Surface treatment with Fenton was applied to flotation separation of acrylonitrile-butadienestyrene (ABS) and polyvinylchloride (PVC). After treatment, the floatability of ABS has a dramatic decrease, while the floatability of PVC is not affected. Fourier transform infrared spectroscopy (FT-IR) spectra and X-ray photoelectron spectroscopy (XPS) spectra were recorded to ascertain the mechanism of Fenton treatment. FT-IR and XPS analysis confirms that the introduction of oxygen-containing group occurs on the surface of ABS. The optimum conditions are molar ration (HO:Fe) 10000, HO concentration 0.4M/L, pH 5.8, treatment time 2min and temperature 25°C, frother concentration 15mg/L and flotation time 3min. Particle sizes and mixing ratios were also investigated. Plastic mixtures of ABS and PVC with different particle sizes and mixing ratios can be effectively separated. The purity of ABS and PVC are up to 100% and 99.78%, respectively; the recovery of ABS and PVC are up to 99.89% and 100%, respectively. A practical, environmentally friendly and effective reagent, namely Fenton, was originally applied to surface treatment of ABS and PVC waste plastics for flotation separation of their mixtures.
采用芬顿试剂对丙烯腈-丁二烯-苯乙烯共聚物（ABS）和聚氯乙烯（PVC）的浮选分离进行了表面处理。处理后，ABS 的浮选性能显著下降，而 PVC 的浮选性能不受影响。记录了傅里叶变换红外光谱（FT-IR）谱和 X 射线光电子能谱（XPS）谱，以确定芬顿处理的机理。FT-IR 和 XPS 分析证实，含氧基团在 ABS 表面上的引入。最佳条件为摩尔比（HO:Fe）10000、HO 浓度 0.4M/L、pH 值 5.8、处理时间 2min 和温度 25°C、起泡剂浓度 15mg/L 和浮选时间 3min。还研究了颗粒大小和混合比。不同粒径和混合比的 ABS 和 PVC 塑料混合物可以有效地分离。ABS 和 PVC 的纯度分别达到 100%和 99.78%；ABS 和 PVC 的回收率分别达到 99.89%和 100%。最初将一种实用、环保、有效的试剂——芬顿试剂应用于 ABS 和 PVC 废塑料的表面处理，用于浮选分离其混合物。
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